Khaitan Steel Forgings
Khaitan Steel Forgings
Amraiwadi, Ahmedabad, Gujarat
GST No. 24AAMFK9555G1ZY
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High Carbon High Chromium Steel Bars

Pioneers in the industry, we offer d2 hchcr steel bar, d3 hchcr steel round bar, hchcr steel rectangular bar and hchcr steel bar from India.

D2 HCHCR Steel Bar

D2 HCHCR Steel Bar
  • D2 HCHCR Steel Bar
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Approx. Price: Rs 220 / KgGet Latest Price

Product Details:

Material GradeD2
Usage/ApplicationIndustrial
ShapeRectangular
Surface FinishGalvanized
Single Piece Length3-6 meter
MaterialHCHCR

D2 steel is an air hardening, high-carbon, high-chromium tool steel. It has high wear and abrasion resistant properties. It is heat treatable and will offer a hardness in the range 55-62 HRC, and is machinable in the annealed condition. D2 steel shows little distortion on correct hardening. D2 steel’s high chromium content gives it mild corrosion resisting properties in the hardened condition.Cold-work tool steels include the high-carbon, high-chromium steels or group D steels. These steels are designated as group D steels and consist of D2, D3, D4, D5, and D7 steels. These steels contain 1.5 to 2.35% of carbon and 12% of chromium. Except type D3 steel, all the other group D steels include 1% Mo and are air hardened. Type D3 steel is oil-quenched.

Other designations that are equivalent to T5 tungsten tool steels include:
  • DIN 1.2379
  • NI KU
  • B.S. BD 2
  • ASTM A681
  • FED QQ-T-570
  • SAE J437
  • SAE J438
  • UNS T30402

Heat Treatment:
  • D2 steels should be preheated very slowly to 815ºC (1500ºF) and then temperature can be increased to 1010ºC (1850ºF).
  • They are then held at 1010ºC (1850ºF) for 20 to 45 minutes and air cooled (air quenched).

Forging:
  • Forging of D2 steels can be done from 1065ºC (1950ºF) down to 954ºC (1750ºF).
  • Do not forge below 926ºC (1700ºF).

Annealing:
  • D2 is supplied in the annealed and machineable condition.
  • Re-annealing will only be necessary if the steel has been forged or hardened by the toolmaker.
  • To anneal, heat slowly and uniformly to 900°C.
  • Soak for three to four hours and allow to cool in the furnace to room temperature.
  • Re-heat to 800-1040°C and again soak for three to four hours.
  • Allow to cool in the furnace to room temperature.

Tempering:
  • D2 steels can be tempered at 204ºC (400ºF) for achieving Rockwell C hardness of 61 and at 537ºC (1000ºF) for a Rockwell C hardness of 54.

Chemical composition:
ElementMinMax
Carbon, C 1.55 1.75
Manganese, Mn 0.20 0.40
Silicon, Si 0.25 0.40
Molybdenum, Mo 0.50 0.70
Chromium,Cr 11.00 12.00
W 0.40 0.60
Vanadium, V 0.10 0.50
Co -- --

Thermal Properties:
Properties Conditions 
T (ºC) Treatment
Thermal expansion 10.4 x 10-6/ºC 20-100 -

Physical Properties:
Physical propertiesMetricImperial
Density 7.7 x 1000 kg/m3 0.278 lb/in3
Melting point 1421°C 2590°F

Mechanical Properties:
PropertiesMetricImperial
Hardness, Knoop (converted from Rockwell C hardness) 769 769
Hardness, Rockwell C 62 62
Hardness, Vickers 748 748
Izod impact unnotched 77.0 J 56.8 ft-lb
Poisson's ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30457 ksi
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D3 HCHCR Steel Round Bar

D3 HCHCR Steel Round Bar
  • D3 HCHCR Steel Round Bar
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Approx. Price: Rs 130 / KgGet Latest Price

Product Details:

Usage/ApplicationIndustrial
GradeD3
MaterialHCHCR
ShapeRound
Diameter2-5 inch
Length3-6 meter

Cold-work tool steels which include D2, D3, D4, D5, and D7 steels are high-carbon, high-chromium steels. Apart from D3 steel all group D steels have 1% Mo and are air hardened. Type D3 steel is oil-quenched; though small sections can be gas quenched after austenitization using vacuum. As a result, tools made with type D3 steel tend to be brittle during hardening. Type D2 steel is the most commonly used steel among the group D steels. The D3 steels contain 1.5 to 2.35% of carbon and 12% of chromium.

 

Equivalent metals of D3 steel are:

  • AFNOR Z 200 C 12
  • DIN 1.2080
  • UNI X 21O Cr 13 KU
  • JIS SKD1
  • B.S. BD 3
  • ASTM A681
  • FED QQ-T-570
  • SAE J437
  • SAE J438
  • UNS T30403

Annealing:
  • Annealing of D3 tool steel needs to be done in a controlled atmosphere furnace.
  • D3 tool steels should be heated thoroughly to 871°C (1600°F) and cooled slowly at a rate of not more than -6°C (20°F) per hour, until the furnace is black.
  • Then the material should be removed and air cooled.

Heat Treatment:
  • D3 tool steel requires hardening and tempering to achieve maximum properties.
  • For maximum accuracy, the parts of D3 tool steel should be stress relieved after roughing operations.
  • Stress should be relieved at 648°C (1200°F) for one hour and cooled slowly.
  • Tempering The D3 tool steel should be cooled to room temperature and should be tempered immediately.
  • The parts should be placed in the tempering furnace and increased slowly to the desired tempering temperature.

Hardening:
  • D3 tool steel should be heated properly since it is very sensitive to overheating and if not heated maximum hardness cannot be achieved.
  • The work should be directly placed in a furnace preheated to 954°C (1750°F) and soaked for 20-25 minutes, plus 5 minutes per inch of thickness, and then oil-quenched to harden it.

Chemical composition:
ElementMinMax
Carbon, C1.902.20
Manganese, Mn0.150.45
Silicon,Si0.100.40
Molybdenum, Mo----
Chromium,Cr11.0012.00
W----
V----
Co----

The following table shows the thermal properties of D3 steels:

PropertiesConditions
T (°C)
Max
Treatment
Thermal expansion 12 x 10-6/ºC20-100-

Physical properties of D3 tool steels are given below:

Physical propertiesMetricImperial
Density7.7 x 1000 kg/m30.278 lb/in3
Melting point1421°C2590°F

The mechanical properties of D3 steels are tabulated below:

PropertiesMetricImperial
Izod impact unnotched28.0 J20.7 ft-lb
Poisson's ratio0.27-0.300.27-0.30
Elastic modulus190-210 GPa27557-30457 ksi

Tempering for 1 hour per inch of thickness is required:
Tempering °C150200250300350400
HRC64/6363/6162/6061/6060/5959/58
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HCHCR Steel Rectangular Bar

HCHCR Steel Rectangular Bar
  • HCHCR Steel Rectangular Bar
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Approx. Price: Rs 130 / KgGet Latest Price

Product Details:

Usage/ApplicationIndustrial
GradeD5
ShapeRectangular
Surface FinishGalvanized
Single Piece Length3-6 meter
TechniqueHot Rolled
MaterialHigh Carbon High Chromium Steel
ThicknessUpto 50 mm

High Carbon High Chromium Die Steel (HCHCR)Thread rolling dies, Hobs, Cold extrusion tools and dies, Punches, Draw plates and dies, Cutters, Measuring tools, Pressure casting moulds, Blanking, Reamer, Finishing rolls for tyre mills. This type of steel has high dimensional stability with added wear resistance coupled with excellent edge holding qualities. Cold-work tool steels include the high-carbon, high-chromium steels or group D steels. These steels are designated as group D steels and consist of D2, D3, D4, D5, and D7 steels. These steels contain 1.5 to 2.35% of carbon and 12% of chromium. Except type D3 steel, all the other group D steels include 1% Mo and are air hardened. Type D3 steel is oil-quenched; though small sections can be gas quenched after austenitization using vacuum. This makes tools made with type D3 steel brittle during hardening. Type D2 steel is the most commonly used steel among the group D steels.

The other designations of D5 tool steels are:
  • ASTM A681
  • FED QQ-T-570
  • SAE J437
  • SAE J438
  • UNS

Heat Treatment:
  • D5 steels should be preheated very slowly up to 815°C (1500°F), then temperature should be increased to 1009°C (1850°F) and held for 20 to 45 minutes.
  • Then they are air quenched.

Forging:
  • Forging of D5 steels can be done at 1065°C (1950°F) down to 1750°F.
  • Do not forge below 926°C (1700°F).

Annealing:
  • Annealing of D5 steels should be done at 886°C (1627°F) followed by slow furnace cooling at 4°C (40°F) per hour or less.

Tempering:
  • D5 steels can be tempered at 204°C (400°F) for achieving Rockwell C hardness of 61 and at 537°C (1000°F) for a Rockwell C hardness of 54.

Chemical composition:
ElementMinMax
Carbon, C 1.40 1.60
Manganese, Mn 0.00 0.60
Silicon,Si 0.00 0.60
Nickel, Ni 0.00 0.30
Molybdenum, Mo 0.70 1.20
Chromium,Cr 11.00 13.00

Physical Properties:
Physical propertiesMetricImperial
Density 7.7 - 8.03 x 1000 kg/m3 0.278 - 0.290 lb/in3
Melting point 1426°C 2600°F

Mechanical Properties:
PropertiesMetricImperial
Poisson's ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30457 ksi
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HCHCR Steel Bar

HCHCR Steel Bar
  • HCHCR Steel Bar
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Approx. Price: Rs 250 / KgGet Latest Price

Product Details:

Usage/ApplicationIndustrial
ShapeRectangular
Surface FinishGalvanized
Thickness/Diameter2-5 inch
Single Piece Length3-6 meter
TechniqueHot Rolled
MaterialHigh Carbon High Chromium Steel

Soft Annealing:
  • Heat to 840-880°C, cool slowly.
  • This will produce a maximum Brinell hardness of 255. To secure uniform softness.

Stress Relieving:
  • Stress relieving to remove machining stresses should be carried out by heating to 650-700°C, holding for one hour at heat, followed by air cooling.
  • This operation is performed to reduce distortion during heat treatment.

Hardening:
  • Harden from a temperature of 1000-1040°C followed by oil, warm bath (500-550°C, cooling bath or air.
  • Hardness after quenching is 62-64 HRC.

Tempering:
  • Tempering temperature: 150-550°C.

Chemical Composition:
PropertiesMetricImperial
Hardness, Brinell (typical) 300 33
Hardness, Rockwell C (typical) 30 30
Tensile strength, ultimate 965-1030 MPa 140000-150000 psi
Tensile strength, yield
827-862 MPa 120000-125000 psi

Elongation at break (in 50 mm (2")) 20.0% 20.0%
Compressive strength 862 MPa 125000 psi
Charpy impact (V-Notch) 27.1-33.9 J 20.0-25.0 ft-lb
Poisson's ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30457 ksi

Thermal Properties:
PropertiesConditions
T (ºC) Treatment
Thermal expansion 10.6 x 10-6/ºC 20-260 -

Quenching Process:
PlanHeat TemperatureCoolingHardness HRC
First-time preheat Second-time preheat Quenching temperature
I 500 - 600 820 - 860 980 - 1040 Oil cooling or air cooling 60 - 65
II 500 - 600 820 - 860 1060 - 1100 Oil cooling or air cooling 60 - 65

Tempering Process:
PlanTempering TemperatureTimes of temperingHardness HRC
I 180 - 220 1 60 - 64
II 510 - 540 2 60 - 64

Forging:
ItemHeat TemperatureStart-forging temperatureFinish-forging temperatureCooling
Steel ingot 1120-1160 1050-1090 ≥850 Annealing with red hot state
Steel billet 1120-1140 1050-1070 ≥850 Annealing with red hot state or slow cooling
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Saket Khaitan (Partner)
Ajod Dairy Road, Opposite Gravity House, Near Keval Kanta Gujarat Bottling, Rakhial
Amraiwadi, Ahmedabad- 380023, Gujarat, India



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