Mat.No. 1.2581, DIN X30WCrV93, AISI H21
Short Description:
Designation by Standards Mat. No. DIN EN AISI 1.2581 X30WCrV93 - H21 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.30 0.23 0.30 2.65 - - 0.35 8.50 - Description This alloy is one of the hot work, tungsten containing tool steels. The tungsten content is beneficial for hot strength at red heat, although toughness is somewhat reduced. Applications Used for hot working dies and tooling such as die casting, extrusion and hot forming of parts. Physical propertie...
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Designation by Standards
| Mat. No. | DIN | EN | AISI |
| 1.2581 | X30WCrV93 | - | H21 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.30 | 0.23 | 0.30 | 2.65 | - | - | 0.35 | 8.50 | - |
Description
This alloy is one of the hot work, tungsten containing tool steels. The tungsten content is beneficial for hot strength at red heat, although toughness is somewhat reduced.
Applications
Used for hot working dies and tooling such as die casting, extrusion and hot forming of parts.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 200
Density [g/cm3]: 8.26
Thermal conductivity [W/m.K]: 15.5
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-400oC | 20-600oC |
| 11.2 | 11.9 | 12.5 | 13.0 |
Soft Annealing
Heat to 820-840oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 240.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 1100-1150oC followed by oil quenching or warm bath quenching approx. 540oC. Hardness after quenching is 52 HRC.
Tempering
Tempering temperature: 580-700oC.
Tempering Diagram
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Diagram Tempering Temperature – Mechanical Properties
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Forging
Hot forming temperature: 1150-900oC.
Machinability
The tungsten content makes H21 somewhat difficult to machine. As compared to the W group of water hardening low alloy steels rated at 100% for machinability the H21 would rate 55%.
Corrosion Resistance
This is a steel alloy and does not have corrosion resistance. It will rust unless given protective treatment.
Welding
This alloy may be welded. Consult the supplier for details.
Forms manufactured: Please see the Dimensional Sales Program.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
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