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Mat.No. 1.2888/DIN X20CoCrWMo10-9

Special high alloy hor work steel. Extreme retention of hardness; suitable for all applications where particular resistance to high temperature wear and melt of of metal is required. 
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  • Mat.No. 1.2888/DIN X20CoCrWMo10-9

Special high alloy hor work steel. Extreme retention of hardness; suitable for all applications where particular resistance to high temperature wear and melt of of metal is required. Applications Extrusion tools for copper, copper alloys and steel, including special dies, die casting tools of all kind for brass, goosenecks and chambers for magnesium die casting, extrusion tools for steel. No water cooling.

Designation by Standards

Mat. No.DINENAISI
1.2888X20CoCrWMo10-9--


Chemical Composition (in weight %)

CSiMnCrMoNiVWOthers
0.200.250.509.502.0--5.50Co: 10.0


Physical properties (average values) at ambient temperature

Modulus of elasticity [103 x N/mm2]: 215  
Density [g/cm3]: 8.08

Soft Annealing

Heats to 760-840oC, cool slowly in the furnace. Time is 4-6 hours. This will produce a maximum Brindle hardness of 320.

Stress Relieving

Stress relieving to remove machining stresses should be carried out by heating to 600-650oC, 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 air, oil quenching or vacuum quenching. Hardness after quenching is about 52 HRC.

Tempering

Tempering temperature: 600-750oC, to increase hardness, temper 2 or 3 times.

Tempering Temperature (oC) vs. Hardness (HRC)

500oC550oC600oC650oC700oC750oC
565655.5544842.3

Forging

Hot forming temperature: 1100-900oC.  

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 purposes. There is no representation that the recipient of this literature will receive updated editions as the become available.


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