Khaitan Steel Forgings
Khaitan Steel Forgings
Amraiwadi, Ahmedabad, Gujarat
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Alloy Steel

Our range of products include en 19 alloy steel, en24 alloy steel, en 353 alloy steel, en31 alloy steel, en36c alloy steel and alloy steel.

EN 19 Alloy Steel

EN 19 Alloy Steel
  • EN 19 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

GradeEN19
ApplicationIndustrial
Thickness/Diameter 1-2 inch
Single Piece Length 18 meter
MaterialAlloy Steel

EN19 is a high quality, high tensile steel usually supplied readily machine able in ‘T’ condition, giving good ductility and shock resisting properties combined with resistance to wear.

Applications

EN19T was originally introduced for the use in the machine tool and motor industries for gears, pinions, shafts, spindles and the like. Later its applications became much more extended and it is now widely used in areas such as the oil and gas industries. EN19T is suitable for applications such as gears, bolts, studs and a wide variety of applications where a good quality high tensile steel grade is suited

Forging

Pre heat carefully, then raise temperature to 850-1200°C for forging. Do not forge below 850°C. After forging cool slowly in still air.

 

Annealing:
  • Heat the EN19T slowly to 680-700°C. Cool in air.

Hardening:
  • This steel grade is commonly supplied ready heat treated.
  • If further heat treatment is required annealed EN19 should be heated slowly to 860-890°C and after adequate soaking at this temperature quench in oil.
  • Temper as soon as tools reach room temperature.

Tempering:
  • Heat carefully to a suitable temperature selected by reference to a tempering chart or table.
  • Soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air.
  • Tempering between 250-375°C is not advised as tempering within this range will reduce the impact value.

Heat Treatment:
  • Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component.
  • Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.
  • Please consult your heat treatment provider for full guidance on heat treatment of EN19T alloy steel.

 

Chemical Composition:
ElementMinMax
Carbon, C0.350.45%
Manganese, Mn0.500.80%
Silicon, Si0.100.35%
Nickel, Ni-.---.--
Molybdenum, Mo0.200.40%
Chromium,Cr0.901.50%
Sulfur, S-.--0.05
Phosphorous, P-.--0.05

Mechanical Properties:
Heat
Treatment
Tensile
Strength
Rm N/mm²
Yield
Stress
Re N/mm²
a% on
5.665ÖSo
Impact
Izod J
Impact
KCV J
Proof
Stress
rp0.2
Hardness
HB
Size
mm
R700/850495153428480201/225>100≤250
S775/925555132722540223/277>150≤250
S775/925585155450570223/277>63≤150
T850/1000680135450655248/302>29≤100
U925/1075755124742740269/331>13≤63
V1000/1150850124742835293/352>6≤29
W1075/1225940124035925311/375>6≤19
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EN24 Alloy Steel

EN24 Alloy Steel
  • EN24 Alloy Steel
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Approx. Price: Rs 80 / KilogramGet Latest Price

Product Details:

MaterialAlloy Steel
GradeEN24
ThicknessUpto 8 mm
ApplicationUsed to produce parts for heavy equipment such as locomotives, cranes, rolling mills

In order to cater to the numerous necessities of the patrons, we have been able to provide a wide range of EN24 Alloy Steel.

Features:

  • Seamless finish
  • Sturdy design
  • High strength
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EN 353 Alloy Steel

EN 353 Alloy Steel
  • EN 353 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Hardening840-870
Brinell Rockwell Hardness150-200
Tempering150-200
QuechingOil

En 353 steel has carbon content of 0.17% and the most common form of steel as it’s provides material properties that are acceptable for many automobile applications such as heavy duty gear, shaft, pinion, cam shafts, gudgeon pins [1,8]. It is neither externally brittle nor ductile due to its lower carbon content and lower hardness.


Chemical Analysis:
  • In order to ensure the material of the specimen is done with help of the optical emission spectroscope (OES).
  • The result is obtain from the chemical analysis, carbon – 0.171 %, silicon – 0.3 %, manganese – 0.56 %, phosphorus – 0.012 %, sulphur – 0.13 %, Chromium – 0.953 %, Nickel – 0.989 %, molybdenum – 0.16 % and remaining percentage is iron respectively.
  • A sample of 30 × 10 mm is polished using 60 grit papers and two sparks is introduced on the surface to find the chemical composition of the material.

Heat treatment Procedure for EN353:
  • CARBURISING Pack, salt or gas carburize at 910C, holding for sufficient time to develop the required case depth and carbon content, Slow cool from carburizing temperature and re-heat to 870C, hold until temperature is uniform throughout the section, quench as required in water, oil or air cool.

Hardness:
  • Vickers hardness measurement is done on the specimen as per the IS 1501-2002 procedures by using Vickers hardness tester (MH6).
  • Hardness measurement is made with 200 g loads, dwell time of 10 seconds and diamond indenter is used for test.

Analysis:
  • X-Ray Diffractometer is one of the most powerful techniques for material structural analysis.
  • Bruker AXS D8 Advance X-Ray diffractometer fit with vertical goniometers, low and high temperature attachment. The angle range is 360°, the maximum usable angular is 3° to 135° and wavelength is 1.5406 Å. X-ray diffraction analysis is carried out under the following condition: Cu radiation, 40 KV voltage, 35 mA current and maximum angular speed 30°/s.
  • When the x-ray is passed into the substrate and it is reflected back to the detector the angle made by the reflected ray to the substrate is denoted as . The value of is increased by changing the position of specimen by keeping the as reference β, D, ε, ρ are calculated. The different values are obtained by the varying value for certain range.

Tempering:
  • Re-heat to 780C – 820C, hold until temperature is uniform throughout the section, and quench in oil, Temper immediately while still hand warm.
  • Heat to 150C – 200C as required, Soak for 1 – 2 hours per 25mm of section, and cool in still air.

 

Chemical composition:

GradeMinMax
Carbon, C-.--0.20%
Manganese, Mn0.501.0%
Silicon, Si-.--0.35%
Nickel, Ni1.01.5%
Molybdenum, Mo0.080.15%
Chromium,Cr0.751.25%
Sulfur, S-.--0.05%
Phosphorous, P-.--0.05%
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EN31 Alloy Steel

EN31 Alloy Steel
  • EN31 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

GradeEN31
MaterialAlloy Steel
Applicationfabrication industry, manufacturing industry

Being a customer oriented enterprise, we are engaged in providing a wide array of EN31 Alloy Steel.

Features:

  • Sturdiness
  • Superior finish
  • Enhanced durability
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EN36c Alloy Steel

EN36c Alloy Steel
  • EN36c Alloy Steel
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Approx. Price: Rs 115 / KilogramGet Latest Price

Product Details:

MaterialAlloy Steel
GradeE36
ApplicationWidely demanded in various industries like mechanical, automobile, etc.

We have marked a remarkable position in the market by offering the best quality array of EN36c Alloy Steel.

Features:

  • Excellent finish
  • Sturdy construction
  • Durability
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Alloy Steel

Alloy Steel
  • Alloy Steel
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Approx. Price: Rs 60 / KilogramGet Latest Price

Product Details:

Spring Temper850 - 1050 N/mm2
Annealed400 - 600 N/mm2
Density8.8 g/cm3

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MS Bright Steel Bars

MS Bright Steel Bars
  • MS Bright Steel Bars
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Approx. Price: Rs 55 / KilogramGet Latest Price

Product Details:

Purity98%
Diameter1mm-600mm
Thickness/Diameter2-3 inch

With the assistance of our dedicated team of professionals, we are providing a premium quality range of MS Bright Steel Bars
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EN19 Alloy Steel

EN19 Alloy Steel
  • EN19 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

GradeE19
MaterialAlloy Steel
ApplicationWidely demanded in fabrication industry

Keeping in sync with the latest market norms and policies, we are indulged in providing a high quality range of EN19 Alloy Steel.

Features:

  • Corrosion proof
  • Flawless finish
  • Optimum strength
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EN 47 Alloy Steel

EN 47 Alloy Steel
  • EN 47 Alloy Steel
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Approx. Price: Rs 85 / KilogramGet Latest Price

Product Details:

MaterialAlloy Steel
GradeEN47
ApplicationIndustrial

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EN 353 Alloy Steel

EN 353 Alloy Steel
  • EN 353 Alloy Steel
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Approx. Price: Rs 80 / KilogramGet Latest Price

Product Details:

GradeEN 353
MateialAlloy Steel
ApplicationIndustrial

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SAE 4140 Alloy Steel

SAE 4140 Alloy Steel
  • SAE 4140 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

GradeSAE 4140
MaterialAlloy Steel
ApplicationIndustrial

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SAE And AISI 4340 Alloy Steel

SAE And AISI 4340 Alloy Steel
  • SAE And AISI 4340 Alloy Steel
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Approx. Price: Rs 80 / KilogramGet Latest Price

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GradeSAE And AISI 4340
MaterialAlloy Steel
ApplicationIndustrial

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DIN 42CrMo4 Alloy Steel

DIN 42CrMo4 Alloy Steel
  • DIN 42CrMo4 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

GradeDIN 42CrMo4
MaterialAlloy Steel
ApplicationIndustral

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Alloy Steel

Alloy Steel
  • Alloy Steel
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Approx. Price: Rs 60 / KilogramGet Latest Price

Product Details:

MaterialAlloy Steel
ThicknessUpto 8 mm
ApplicationIndustrial

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Forged Round Bars

Forged Round Bars
  • Forged Round Bars
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Approx. Price: Rs 60 / KilogramGet Latest Price

Product Details:

Minimum Order Quantity500 Kilogram
ApplicationManufacturing

We are manufacturers of forged round bars and ready stock always

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EN 31 Alloy Steel

EN 31 Alloy Steel
  • EN 31 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Imperial0.284 lb/in3
Metric7.85 g/cc
Hardening Temperature802- 860 C

EN31 is a high carbon Alloy steel which achieves a high degree of hardness with compressive strength and abrasion resistance.

Forging:
  • Forge at 1000°/1050°C.
  • Heat slowly, allowing sufficient time at the forging temperature for the steel to be thoroughly soaked through.
  • Re-heat as often as necessary to keep the temperature above 850°C.
  • After forging cool very slowly, preferably in a furnace.

Annealing:
  • Heat uniformly to 800°C, equalize, then furnace cool. (Hardness about 229 Brinell).

Stress Relieving:
  • If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalize, then cool slowly.

Hardening:
  • Heat uniformly to 800/820°C until heated through. Allow 30 minutes per inch of ruling section and quench immediately in oil.

Tempering:
  • Heat uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per inch of total thickness


Specifications:

Tempering °C100150200250300350
HRc64/6363/6262/6160/5957/5654/53

 

Product Details:
Name of Material Composition in % of Weight
CMnSiPMg
En-31 IS-103 Crl1.50.520.050.05

 

Production Description:
Thermal conductivity W/m-kDensity Kg/m^3Melting Point
46.678101540

 

Mechanical Properties:

ElementObjective
Tensile Strength750 N/mm²
Yield Stress450 N/mm²
Reduction of Area45%
Elongation30%
Modulus of elasticity215 000 N/mm²
Density7.8 Kg/m3
Hardness63 HRC

Heat Treatment of EN-31:
ElementObjective
Hardening Temperature802- 860 C
Quenching MediumOil
Tempering Temperature180- 225 C
Brinell-Rockwell Hardness59 - 65
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EN36c Alloy Steel

EN36c Alloy Steel
  • EN36c Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Reduction of Area50%
Carbon0.18%
Hardness341 HB

EN36C gives a hard case with a strong core, whilst retaining a remarkable degree of toughness.

Applications:
  • As a carburizing steel grade it is suitable for roller and ball bearings of extra light section, aero plane and motor crankshafts requiring hard surfaces for roller paths, connecting rods with case-hardened ends, as well as highly stressed gudgeon pins, gears and certain types of collets.

Carburizing / Case Hardening:
  • Case hardening will give a hard wear resisting surface and tough core strength to the steel.
  • Case hardening temperatures range from 860-960°C, followed by rapid quenching which will determine the resulting hardness.

Tempering:
  • For optimum toughness temper at low temperatures for a minimum of 2 hours.
  • The case hardness should be in the region of 60-62HRc.

 

Softening:

  • If it is necessary to soften the EN36 for machining between the carburising and subsequent heat treatment stages, heat to 640-650°C.
  • Soak at this temperature for 1 to 2 hours and cool slowly in the furnace or in air.

Heat Treatment:
  • Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each EN36 steel component.
  • Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.
  • Please consult your heat treatment provider for full guidance on heat treatment of EN36 case hardening steel.


Chemical Composition:

ElementMinMax
Carbon, C
0.120.18%
Manganese, Mn0.300.60%
Silicon, Si0.100.35%
Nickel, Ni3.003.75%
Molybdenum, Mo0.100.25%
Chromium,Cr0.601.1%
Sulfur, S-.--0.05%
Phosphorous, P-.--0.05%


Specifications:

Tensile Strength N/mm²Elongation %Impact Izod JReduction of Area %
1110154050
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EN 24 Alloy Steel

EN 24 Alloy Steel
  • EN 24 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Section250mm
Surface hardened typically58-60 HRC
Grades605M36, 708M40 or 709M40

Product Details:
Carbon(C)Directly influences the hardness and strength of the steel, decreases toughness.
Chromium(Cr)Improves Hardenability, high temperature strength, wear resistance and even corrosion resistance(Cr>14%).
Cobalt(Co)Improves retention of hardness at high temperatures.
Molybdenum(Mo)Increases yield point and strength. Improves Hardenability and wear resistance. Manganese Lowers effects of Iron sulphides, increases hardenability, wear resistance.
Nickel(Ni)Increases toughness at lower temperatures, slows the corrosion process. Improves toughness, grain structure, high temperature strength, wear resistance, etc.

Mechanical Properties:
Heat TreatmentTensile strength RmYield stress ReA min on 5.65ImpactKCV JHardness HBLimiting Ruling Section
MPaMPaIzod Ft.lbmm
T850/1000650133035248/302250

850/1000680134050248/302150
U925/1075755123542269/331100
V1000/1150850123542293/35263
W1075/1225940113035311/37529
X1150/13001020102528341/40129
Y1225/13751095101821363/42929
Z1550123558944429
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EN 47 Alloy Steel

EN 47 Alloy Steel
  • EN 47 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Thermal expansion10-10 e-6/k
Specific heat460-460 J/kg.k
Thermal conductivity25-25 W/m.k

EN47 is suitable for oil hardening and tempering. When used in the oil hardened and tempered condition EN47 spring steel combines spring characteristics with good wear and abrasion resistance. When hardened EN47 offers excellent toughness and shock resistance which make it a suitable alloy spring steel for parts exposed to stress, shock and vibration.


Applications:
  • EN47 is used widely in the motor vehicle industry and many general engineering applications.
  • Suitable for applications that require high tensile strength and toughness.
  • Typical applications include crankshafts, steering knuckles, gears, spindles and pumps.

 

Forging:

  • Preheat the steel carefully, then raise temperature to 1050°C for forging.
  • Do not forge below 840°C. After forging EN47 spring steel cool slowly, preferably in a furnace.

Annealing:
  • Heat slowly to 820-840°C, soak well. Cool slowly in the furnace.

Hardening:
  • Heat slowly to 650-700°C and thoroughly soak.
  • Continue to heat the steel to the final hardening temperature of 830-860°C and allow the component to be heated through. Quench in oil.

Tempering:
  • Temper the EN47 spring steel component immediately after quenching whilst tools are still hand warm.
  • Re-heat to the tempering temperature then soak for one hour per 25 millimetre of total thickness (2 hours minimum) Cool in air.
  • For most applications tempering of this grade will be between 400-600°C.

Welding:
  • We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding EN47 chrome vanadium spring steel.

Heat Treatment:
  • Heat treatment temperatures, including rate of heating, cooling and soaking times etc.
  • Will vary due to factors such as the shape and size of each component.
  • Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.
  • Please consult your heat treatment provider for full guidance on heat treatment of EN47.

 

Chemical composition:

ElementMin %Max %
Carbon, C0.450.55
Manganese, Mn0.500.80
Silicon, Si-.--0.50
Nickel, Ni-.---.--
Molybdenum, Mo-.---.--
Chromium,Cr0.801.20
Sulfur, S-.--0.05
Phosphorous, P-.--0.05
Vanadium0.15-.--

Mechanical Properties:
QuantityValueUnit
young's Modulus200000-200000MPa
Tensile strength650-880MPa
Elongation8-25%
Fatigue275-275MPa
Yield strength350-550MPa

Physical Properties:
QuantityValueUnit
Thermal expansion10-10e-6/k
Thermal conductivity25-25W/m.k
Specific heat460-460J/kg.k
Melting temperature1450-1510°C
Density7700-7700kg/m3
Resistivity0.55-0.55ohm.mm2/m
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SAE/AISI 4140 Alloy Steel

SAE/AISI 4140 Alloy Steel
  • SAE/AISI 4140 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Imperial0.284 lb/in3
Metric7.85 g/cm3
Chromium1.50

4140 is a 1% chromium-molybdenum medium harden ability general purpose high tensile steel-generally supplied hardened and tempered in the tensile range of 850-1000 Mpa (condition T). 4140 available, which greatly increases feeds and/or speeds, while also extending tool life without adversely affecting mechanical properties. Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening and by nit riding. 4140 is used extensively most industry sectors wide range applications: Adapters, Arbors, Axle Shafts Bolts, Crankshafts, Connection Rods, Chuck Bodies, Collets, Conveyor Pins & Rolls, Ejector Pins, Forks, Gears, Guide Rods, Hydraulic Shafts & Parts, Lathe Spindles, Logging Parts, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pins Various, Pinions, Pump Shafts, Rams, Sockets, Spindles, Sprockets, Studs, Tool Holders, Torsion Bars, Worms etc

Machinability:
  • AISI 4140 alloy steel has good machinability in the annealed condition

Forming:
  • AISI 4140 alloy steel has high ductility
  • It can be formed using conventional techniques in the annealed condition.
  • It requires more pressure or force for forming because it is tougher than plain carbon steels

Welding:
  • AISI 4140 alloy steel can be welded using all conventional techniques
  • However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.

 

Chemical composition:

ElementMinMax
Carbon, C0.350.45
Manganese, Mn0.500.80
Silicon, Si0.100.35
Ni-.---.--
Molybdenum, Mo0.200.40
Chromium0.901.50
Sulfur, S---0.05
Phosphorous, P---0.05

Physical Properties:
PropertiesMetricImperial
Density7.85 g/cm30.284 lb/in³
0.284 lb/in³1416°C2580°F

Mechanical Properties:
PropertiesMetricImperial
Tensile strength655 MPa95000 psi
Yield strength415 MPa60200 psi
Bulk modulus (typical for steel)140 GPa20300 ksi
Shear modulus (typical for steel)80 GPa11600 ksi
Elastic modulus190-210 GPa27557-30458 ksi
Poissons ratio0.27-0.300.27-0.30
Elongation at break (in 50 mm)25.70%25.70%
Hardness, Brinell197197
Hardness, Knoop (converted from Brinell hardness)219219
Hardness, Rockwell B (converted from Brinell hardness)9292
Hardness, Rockwell C (converted from Brinell hardness Value below normal HRC range, for comparison purposes only)1313
Hardness, Vickers (converted from Brinell hardness)207207
Machinability (based on AISI 1212 as 100 machinability)6565

Thermal Properties:
PropertiesMetricImperial
Thermal expansion co-efficient (@ 0-100°C/32-212°F)12.2 µm/m°C6.78 µin/in°F
Thermal expansion co-efficient (@ 0-100°C/32-212°F)42.6 W/mK296 BTU in/hr.ft².°F
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SAE / AISI 4340 Alloy Steel

SAE / AISI 4340 Alloy Steel
  • SAE / AISI 4340 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Yield strength470 MPa
Tensile strength108000 psi
Bulk modulus140 GPa

Machinability:
  • AISI 4340 alloy steel can be machined using all conventional techniques.
  • Machining process can be performed in the annealed or normalized and tempered conditions.

Forming:
  • AISI 4340 alloy steel has good ductility and formability in the annealed condition.
  • It can be bent or formed by pressing or spinning in the annealed state.

Welding:
  • AISI 4340 alloy steel can be welded using fusion or resistance welding methods.
  • Preheat and post heat weld procedures are followed while welding this steel by established methods.

Heat Treatment:
  • AISI 4340 alloy steel is heat treated at 830°C (1525°F) followed by quenching in oil.

Forging:
  • AISI 4340 alloy steel is forged at 427 to 1233°C (1800 to 2250°F).

Cold Working:
  • AISI 4340 alloy steel can be cold worked using all conventional methods in the annealed condition.
  • It has high ductility.

Annealing:
  • AISI 4340 alloy steel is annealed at 844°C (1550°F) followed by cooling the furnace.

Tempering:
  • AISI 4340 alloy steel should be in the heat treated or normalized and heat treated condition before tempering.
  • Tempering temperatures depend upon the desired strength level.

Hardening:
  • AISI 4340 alloy steel can be hardened by cold working or heat treatment.

 

Chemical Composition:

ElementMinMax
Carbon, C
0.350.45
Manganese, Mn
0.450.70
Silicon, Si
0.100.35
Nickel, Ni
1.31.8
Molybdenum, Mo
0.200.35
Chromium,Cr
0.901.40
Sulfur, S
-.--0.5
Phosphorous, P
-.--0.5

Mechanical Properties:
PropertiesMetricImperial
Tensile strength745 MPa108000 psi
Yield strength470 MPa68200 psi
Bulk modulus (typical for steel)140 GPa20300 ksi
Shear modulus (typical for steel)80 GPa11600 ksi
Elastic modulus190-210 GPa27557-30458 ksi
Poisson's ratio0.27-0.300.27-0.30
Elongation at break0.220.22
Reduction of area0.50.5
Hardness, Brinell217217
Hardness, Knoop (converted from Brinell hardness)240240
Hardness, Rockwell B (converted from Brinell hardness)9595
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)1717
Hardness, Vickers (converted from Brinell hardness)228228
Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel.)5050

Thermal Properties:
PropertiesMetricImperial
Thermal expansion co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper12.3 µm/m°C6.83 µin/in°F
Thermal conductivity (typical steel)44.5 W/mK309 BTU in/hr.ft².°F
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DIN 42 CrMo4 Alloy Steel

DIN 42 CrMo4 Alloy Steel
  • DIN 42 CrMo4 Alloy Steel
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Approx. Price: Rs 65 / KilogramGet Latest Price

Product Details:

Yield Strength900 min Mpa
Reduction of area40 mm
Tensile Strength1100-1300Mpa

DIN 41Cr4 and DIN 42CrMo4 materials have been widely used in automotive driving elements. Although 42CrMo4 is more expensive than 41Cr4, it is more preferable in terms of material properties. In this study, these two materials were heat treated by austenitizing in a continuous furnace at 850 °C and quenched in oil at 90 °C. After they were tempered at various temperatures, mechanical properties were determined for each tempering temperature. The material properties for both materials were compared with each other.


Heat Treatment:

  • Forging:Heat to 1150°C Hold until uniform.Minimum forging temperature 850°C.
  • Cool slowly in ashes or sand etc.
  • Annealing:Heat to 830°C – 850°C. Cool in furnace.
  • Normalising:Heat to 870°C – 900°C. Cool in still air.

Forging:
  • Heat to 1150°C Hold until uniform.Minimum forging temperature 850°C.Cool slowly in ashes or sand etc.
  • Annealing:Heat to 830°C – 850°C. Cool in furnace.
  • Normalising: Heat to 870°C – 900°C. Cool in still air. Weld ability
  • Readily welded in the annealed condition but avoid when possible if hardened and tempered due to the effect on the mechanical properties.
  • Welding in the nitrided, flame or induction hardened condition is not recommended.

 

Chemical Composition:

PropertiesMetricImperial
Hardness, Brinell (typical)30033
Hardness, Rockwell C (typical)3030
Tensile strength, ultimate965-1030 MPa140000-150000 psi
Tensile strength, yield
827-862 MPa120000-125000 psi

Elongation at break (in 50 mm (2"))20.0%20.0%
Compressive strength862 MPa125000 psi
Charpy impact (V-Notch)27.1-33.9 J20.0-25.0 ft-lb
Poisson's ratio0.27-0.300.27-0.30
Elastic modulus190-210 GPa27557-30457 ksi

Temperature °C:
Hot formingNarmalaizing+NQuenching+QQuenching+QTempering+TStress-relieving+SR
1100-850870air860 oil or polymer850 water540-68050°C under the temperature
Soft annealing+AIsothermal annealing+iSpheroidizing annealing+ACEnd Quench hardenability testPre heating weldingStress-relieving after welding
720 air(HP max 241)820 fumace cooling to 670,then air (HB max 200)840 water300550 fumace cooling
Ac1Ac3MsMf
745790335120

 

Mechanical Properties((Hardened and Tempered):

Dia Scope(mm)Tensile Strength Rm (Mpa)Yield Strength R2 (Mpa)Elongation (longitudinal direction) Al (%)Reduction of area (%)Impact Energy Joules (-20°C)
16 max1100-1300900 min10 min40 min30 min
16-401000-1200750 min11 min45 min35 min
40-100900-1100650 min12 min50 min35 min
100-160800-950650 min13 min50 min35 min
160-250750-900500 min14 min55 min35 min
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DIN 34 CrNiMo6 Alloy Steel

DIN 34 CrNiMo6 Alloy Steel
  • DIN 34 CrNiMo6 Alloy Steel
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Product Details:

Normalizing850-880
Quenching830-860
Soft Annealing650-680

34CrNiMo6, it is one kind of Quench and tempering special CrNiMo steel material, characterized by high tensile strength and high toughness. It is suitable to the manufacture of components of maximum thickness equal to 120 mm meanly or strongly stressed and even with acomplicated geometry (shafts, camshafts, axles, levers, connecting rods, rocker arms, gear wheels). Advised austenitic grain dimension > 5 according to UNI 3245 (similar to ASTM E 112-82).

  • Normalizing:
  • Normalizing temperature: 850.0°C

    Forging:
      • Hot forming temperature: 1100-900°C

      Corrosion Resitance:
      • This is a low alloy steel and rota corrosion resistant alloy
      • Prolect: Ne coating shoud be used

      Welding:
      • The alloy can be fusion or resistance welded. Preheat and post heat wed procedures should be followed when welding this alloy by established methods.

      Hardening:
      • Harden from a temperature of 830-860°C followed by oil quenching.
      • Quenching temperature in the end-quench test is 850°C

      Stress Relieving:
      • Stress relieving to remove machining stresses should be carried out by heating to approx. 650°C. holding for 1-2 hours at heat, followed by a, cooling
      • This operation is perform. to r.uce distortion during heat treatment


      Cold working:

      • The VCH1,10150 alloy may be cold worked, in the annealed condion, by conventional methods and tooling. Chas good ductility.

       

      Comparison of steel grades:

      JUS.5431
      DIN34CrNiMo6
      BS(816M40, 817M40)
      GOST(38H2N2MA)
      AISI(4337, 4340)
      NF35NCD6


      Chemical Composition:

      PropertiesMetricImperial
      Hardness, Brinell (typical)30033
      Hardness, Rockwell C (typical)3030
      Tensile strength, ultimate965-1030 MPa140000-150000 psi
      Tensile strength, yield
      827-862 MPa120000-125000 psi

      Elongation at break (in 50 mm (2"))20.0%20.0%
      Compressive strength862 MPa125000 psi
      Charpy impact (V-Notch)27.1-33.9 J20.0-25.0 ft-lb
      Poisson's ratio0.27-0.300.27-0.30
      Elastic modulus190-210 GPa27557-30457 ksi

      Physical Properties:
      Diameter(mm)0.2%proof stress(N/mm2)Tensile strength(N/mm2)Elongation of area(%)Reduction of area(%)Notch impact energy (ISO-V) (J)
      up to 169801180-138094041
      17-408851080-1280104548
      41-100785980-1180115048
      101-160685880-1180125548
      161-250590780-930135548


      Heat Treatment And Hot Plastic Deformation Temperatures:

      Temperature ° CCooling Medium
      Hot plastic deformation850-1100/
      Normalizing850-880air
      Soft Annealing650-680air
      Quenching830-860oil
      Tempering540-660air
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