ASTM D2 DIN 1.2379 JIS SKD11

ASTM D2 DIN 1.2379 JIS SKD11 General cold work die steel with good machinability,to be made die casting mold,extrusion and injection mold and ejector pins,ejector sleeve,punches,block gauge,measuring tools.
High wear resistance,high toughness,small deformation caused by heat treatment.
Have a high and uniform hardness after heat treatment,heat resisting,resistance to high temperature oxidation,good toughness,machinability and weldability.
Annealing ≤HB255,pre-hardened HRC 40-46/HRC50-55.

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Chemical Composition

Sort	Steel Grade	Chemical Composition，%
Sort	Steel Grade	C	Si	Mn	P	S	Cr	Ni	Mo
Plastic Mold Steel	M50C	0.47-0.53	0.17-0.37	0.5-0.8	≤0.03	≤0.03	——	——	——
	P20	0.36-0.42	0.2-0.8	0.6-1.2	≤0.025	≤0.015	1.4-2	——	0.3-0.55
	P768R	0.36-0.42	0.2-0.8	1-1.5	≤0.025	≤0.015	1.4-2	0.8-1.2	0.3-0.55
	P166R	0.35-0.45	≤1	≤0.8	≤0.025	≤0.015	12-14	——	——
Cold Work Steel	D2	1.4-1.6	0.1-0.6	0.1-0.6	≤0.03	≤0.03	11-13	——	0.7-1.2
	SKD11	1.4-1.6	≤0.4	≤0.6	≤0.03	≤0.03	11-13	——	0.8-1.2
	O1	0.85-1	0.1-0.5	1-1.4	≤0.03	≤0.03	0.4-0.7	——	——
Hot Work Steel	H13	0.32-0.45	0.8-1.25	0.2-0.6	≤0.03	≤0.03	4.75-5.5	——	1.1-1.75
High Speed Tool Steel	M2	0.8-0.9	0.2-0.45	0.15-0.4	≤0.03	≤0.015	3.8-4.4	——	4.5-5.5

V	W	Cu	Cu+Ni
——	——	≤0.3	≤0.55
——	——	≤0.3	≤0.55
——	——	≤0.3	——
——	——	≤0.3	≤0.55
0.5-1.1	——	——	≤0.75
0.2-0.5	——	≤0.3	≤0.55
≤0.3	0.4-0.6	——	≤0.75
0.8-1.2	——	——	≤0.75
1.75-2.2	5.5-6.75	≤0.3	≤0.55

Delivery Hardness

Steel Grade	Hardness HB（HRC）
Steel Grade	Quenched and Tempered Condition	Annealed Condition（Normal ized）
M50C	——	200-245HB
P20	285-330HB(30-36HRC)	≤235HB
P768R	285-330HB(30-36HRC)	≤235HB
P166R	285-330HB(30-36HRC)	≤229HB
D2	——	≤235HB
SKD11	——	≤235HB
O1	——	≤235HB
H13	——	≤235HB
M2	——	≤255HB

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