Die Steel Bars and Sheets

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We are offering D3 Die Steel Round Bar to our clients. 

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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 T30405

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:

Physical Properties:
Mechanical Properties:

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We are offering Die Steel Round Bar to our clients. 

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Chemical composition:

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Soft Annealing:

• Protect the steel and heat through to 890°C (1630°F).
• Then cool in the furnace at 20°C (40°F) per hour to 850°C (1560°f), then at 10°C (20°F) per hour to 700°C (1290°F), then freely in air.

Stress-relieving:

• After rough machining the tool should be heated through to 650°C (1200°F), holding time 2 hours.
• Cool slowly to 500°C (930°F), then freely in air.

Hardening:

• Preheating temperature: 600-850°C (1110-1560°F)
• Austenitizing temperature: 1020-1050°C (1870-920°F), but usually 1020°C-1030°C (1870-1885°F).

Tensile strength at room temperature:

• The tensile strength values are to be considered as approximate only.
• All samples were taken from a bar (in the rolling direction) 25 mm (1″) diameter.
• Hardened in oil from 1025 ±10°C (1880 ±20°F) and tempered twice to the hardness indicated.

Welding:

• Good results when welding tool steel can be achieved if proper precautions are taken to elevated working temperature, joint preparation, choice of consumables and welding procedure.
• For best result after polishing and photo-etching use consumables with the same composition as in the mould.

Tempering:

• Choose the tempering temperature according to the hardness required by reference to the tempering graph.
• Temper minimum twice with intermediate cooling to room temperature.
• Lowest tempering temperature 250 °C(480 °F). Holding time at temperature minimum 2 hours

Chemical composition:
Mechanical Properties:

Hardened and tempered to 50 HRC. Data at room and elevated temperatures:

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We are offering DB2 Die Steel Square Bar to our clients. 

Chemical composition:

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We are offering OHNS Die Steel Round Bar to our clients. 

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To serve the requisite requirements of our precious customers, we are engaged in providing a qualitative range of Industrial Die Steel Flat Bar.

Features:

• Robustness
• High strength

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By leveraging upon our extensive market knowledge, we provide the best array of Die Steel Flat Bar.

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We have marked a dynamic position in the market by providing the finest quality range of D2 Die Steel Round Bar.

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Characteristics:

• With good hardenability and abrasion resistance.
• With high oxidation resistance, good corrosion protection after quenching and polishing and little deformation through heat treatment

Annealing:

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

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.

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.

Tempering:

• Tempering temperature: 150-550°C.

Chemical Composition:
Quenching Process:
Tempering Process:
Forging:

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We are offering Die Steel Rectangular Bar to our clients. 

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Oil Hardening Non Shrinking Die Steel Blanking and stamping dies, Punches, Rotary shear blades, Thread cutting tools, Milling cutters, Reamers, Measuring tools, Gauging tools, Wood working tools, Broaches, Chasers. An ideal type oil-hardened steel which is economical and dependable for gauging, cutting and blanking tools as well as can be relied for hardness and good cutting performance. O1 Tool Steel is an electric-furnace melted, oil-hardened, non-shrinking, general-purpose tool steel. It is chemically composed of approximately 0.95 percent carbon, 1.1 percent manganese, 0.6 percent chromium, 0.6 percent tungsten and 0.1 percent vanadium. The hardening temperature of O1 tool steel is between 790 degrees Celsius and 820 degrees Celsius. Uses O1 Tool Steel is not easily abraded, has high surface hardness post tempering, does not deform during hardening and can be machined well. Further, it also has a low hardening temperature (and, therefore, can be heat treated in homes and shops), and does not lose shape during quenching. It is inexpensive and readily available. O1 Tool Steel is ideal for making tools and knives, as it can be easily sharpened. Strength and Hardness Strength of a metal determines the extent to which it may deform when load is applied on it. Strength can be measured based on various parameters, such as the maximum ability to take strain, resistance to wear and tear, impact handling, or how the material performs when subjected to frequently changing load conditions. Strength generally increases as the carbon and manganese content increases. Given the high percentage of both of those, O1 Tool Steel is strong. Hardness of a material indicates its resistance to get indented that is not temporary (i.e.; it persists even after the load conditions are removed, as opposed to the strength that is an indication of its performance only when the load is applied), and carbon is also the primary hardening element in steel. The Rockwell method measures the hardness of O1 Tool Steel to be in the range of 64 RC to 58 RC (this is the most commonly used measurement technique).

Toughness and Brittleness:

• Toughness of a material determines whether it can be subjected to shock conditions, and the extent to which it may undergo deformity in shape but still not snap.
• If subjected to a proper treatment process, O1 Tool Steel tends to be very tough.
• As opposed to toughness, brittleness measures whether a material will snap instead of getting deformed, when load is applied.
• Alloy steels like O1 Tool Steel are less brittle than cast or pig iron because of the presence of magnesium.

Forming:

 

The following table shows the physical properties of P20 tool steels:

Product Details:

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. The D3 tool steel should be cooled to room temperature and should be tempered immediately.

Equivalent metals of D4 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 T30403Annealing

Product Details:

• Annealing of D4 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:

• D4 tool steel requires hardening and tempering to achieve maximum properties.
• For maximum accuracy, the parts of D4 tool steel should be stress relieved after roughing operations.
• Stress should be relieved at 648°C (1200°F) for one hour and cooled slowly.

Stress-relieving:

• After rough machining the tool should be heated through to 650°C (1200°F), holding time 2 hours.
• Cool slowly to 500°C (930°F), then freely in air.

Hardening:

• D4 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:

The following table shows the thermal properties of D4 steels:

Physical Properties:

The mechanical properties of D4 steels are tabulated below: