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DIN 1.2581 / AISI H21

DIN 1.2581 / AISI H21



Product Description

1.2581 / H21 Hot Work Tool Steel

Standards

DIN

AISI

JIS

ГОСТ

X30WCrV93

1.2581

H21

SKD5

3X2B8Φ

 

Chemical composition (typical analysis in %)

C

Si

Mn

P

S

Cr

W

V

0.25-0.35

0.15-0.30

0.20-0.40

≤0.030

≤0.030

2.50-2.80

8.00-9.00

0.30-0.40

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Steel properties :

Tungsten-chrome-vanadium steel for hardening in oil and possibly in air with very good hardenability, very high firmness during the heat and resistance to the tempering, high resistance to the hot tempering and good toughness. Further the steel has a lower resistance to tearing of thermal fatigue and higher sensitivity to quick changes of temperature. The steel is not appropriate for tools cooled by water. It is well-workable during the heat and well-workable in the soft-annealed state.

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Applications :

 

Tools for hot mechanical working such as highly stressed small pressing dies and die inserts especially for die forging of accurate products from the difficult-workable steels and copper alloys, thorns and jaws for forging presses, forgings for swaging, tools for production of rivets, nuts and screws, small extrusion dies (matrices), thorns, pressing discs for extrusion of alloys of non-ferrous metals.

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Size range :

Diameter (mm)

Thickness (mm)

Width (mm)

6 - 500

6 - 400

Max 810

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Delivery condition :

Soft annealed to max. 241 HB

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Heat Treatment:

Soft annealing

Temperature(°C)

Cooling

Hardness

740 - 780

furnace

max. 241 HB

 

Forging

Temperature(°C)

Cooling

 

 

850 - 1100

furnace

 

 

Hardening

Temperature(°C)

Cooling

Tempering

 

1140 - 1160

oil or air

see tempering diagram

 

 

 

Remarks: All technicial information is for reference only.

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