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1.2080 Cold Work Tool Steel

D3 is an oil hardening, high carbon/chromium type tool steel with very high wear resistance. It hardens with a very slight change in size. The alloy possesses very high compressive strength and is deep hardening.

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Properties：

● Has high wear resistance and harden-ability, not easy to deform.

Applications：

● Typical applications include forming rolls, drawing dies, and powder compaction molding dies.

Parameters

Grade		Chemical Composition (%)
Grade		C	Si	Mn	Cr	V	P	S
GB	Cr12	2.00~2.30	≦0.40	≦0.40	11.50~13.00	-	≦0.03	≦0.03
ASTM	D3	2.00~2.35	0.10~0.60	0.20~0.60	11.00~13.00	≦1.00	≦0.03	≦0.03
DIN	1.2080	1.90~2.20	0.10~0.40	0.15~0.45	11.00~12.00	-	≦0.03	≦0.03
JIS	SKD1	1.80~2.40	≦0.40	≦0.60	12.00~15.00	<0.30	≦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
		Ø12~Ø50		Ø50~Ø250		Ø50~Ø650		width	80~610	610max

Physical properties (average values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: 210
Density [g/cm³]: 7.67
Thermal conductivity [W/m.K]: 20.0
Electric resistivity [Ohm mm²/m]: 0.65
Specific heat capacity[J/g.K]: 0.46

Soft Annealing

Heat to 800-840^oC, cool slowly. This will produce a maximum Brinell hardness of 250. To secure uniform softness.

Stress Relieving

Stress relieving to remove machining stresses should be carried out by heating to 650^oC, 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 940-980^oC followed by oil quenching or warm bath approx. 400^oC. Hardness after quenching is 64-66 HRC.

For small parts up to thickness 30 mm. Harden from a temperature of 960-1000^oC followed by air, comompressed air quenching. Hardness after quenching is 63-65 HRC.

Tempering

Tempering temperature: 150-400^oC.

Tempering Temperature (^oC) vs. Hardness (HRC)