1.2436 Cold Work Tool Steel
Ledeburitic chromium steel with high durability and cutting performance; low distortion on hardening.
Properties：
● Very wear resistance, high compressive strength, very low hardenability, high tempering resistance.
Applications：
● Mainly used for punching, pressing, cutting die, dealing with hard sheet, ceramic, brick and tile and wear material, plastic, silicon steel sheet and so on.
Parameters
Grade | Chemical Composition (%) | |||||||||
C | Si | Mn | Cr | W | P | S | ||||
GB | Cr12W | 2.00~2.30 | ≦0.40 | ≦0.35 | 11.00~12.50 | 0.60~0.90 | ≦0.03 | ≦0.03 | ||
ASTM | D6 | 2.00~2.20 | 0.70~0.90 | 0.20~0.40 | 11.50~12.50 | 0.60~0.90 | ≦0.03 | ≦0.03 | ||
DIN | 1.2436 | 2.00~2.30 | 0.10~0.40 | 0.30~0.60 | 11.00~13.00 | 0.60~0.80 | ≦0.03 | ≦0.03 | ||
Specification | Round BarØ (mm) | Flat Bar (mm) | ||||||||
Hot Rolled | Hot Forged | EAF | ESR | |||||||
Ø12~Ø50 | EAF | ESR | Thickness | 20~200 | 20~450 | |||||
Ø50~Ø250 | Ø50~Ø650 | width | 80~610 | 610max | ||||||
Physical properties (average values) at ambient temperature
Modulus of elasticity [103x N/mm2]: 210
Density [g/cm3]: 7.77
Thermal conductivity [W/m.K]: 20.0, 20.5 (at 350oC), 24.1 (at 700oC)
Electric resistivity [Ohm mm2/m]: 0.65
Specific heat capacity[J/g.K]: 0.46
Soft Annealing
Heat to 800-840oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 255.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 650oC, 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 940-980oC followed by air,oil quenching or warm bath quenching 500-550oC. Hardness after quenching is 64 HRC.
Tempering Temperature (oC) vs. Hardness (HRC)
100oC | 200oC | 300oC | 400oC | 500oC | 600oC |
63 | 62 | 60 | 58 | 56 | 48 |
Forging
Hot forming temperature: 1050-850oC.
