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1.2888 X20CoCrWMo10-9 Forged Forging Round Bars Hollow Bars Square rectangular rectangle Blocks Discs Disks Plates Flat Bars
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We are professional 1.2888 X20CoCrWMo10-9 Forged Forging Round Bars Hollow Bars Square rectangular rectangle Blocks Discs Disks Plates Flat Bars from china

Chemical Composition ( in weight %)

 

CSiMnCrWOthers
0.200.250.509.505.50Co: 10.0

 

 

Description

Special high alloy hot work steel. Extreme retention of hardness, suitable for all applications where particular resistance to high temperature wear and melt 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. Nop water cooling.

Physical properties (average values) at ambient temperature

Modulus of elasticity [10x N/mm2]: 215

Density [g/cm3]: 8.08

Soft Annealing

Heat to 760-840℃, cool slowly in furnace. Time is 4-6 hours. This will produce a maximum Brinell hardness of 320.

Stress Relieving

Stress relieving to remove machining stresses should be carried out by heating to 600-650℃, 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 1100-1150℃ followed by air, oil quenching or vacuum quenching. Hardness after quenching is about 52 HRC.

Coefficient of Linear Thermal Expansion 10-6-1

 

20-10020-20020-30020-40020-50020-60020-700
12.112.112.412.913.514.0

14.1

 

Soft Annealing

Heat to 800-840℃, cool slowly in furnace. This will produce a maximum Brinell hardness of 250.

 

Stress Relieving

Stress relieving to remove machining stresses should be carried out by heating to 650℃, 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 1020-1060℃ followed by oil, air or warm bath quenching. Hardness after quenching is 49-53 HRC.

Tempering

 

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

 

Tempering Temperature (℃) vs. Hardness (HRC)

5005506000650700750
565655.55448

42.3

 

Forging

Hot forming temperature: 1100-900℃.

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