主要成份％	C碳	Si矽	Mn锰	Cr（铬）	MO（钼）	V（钒）	P磷	S硫
	0.35-0.42	0.80-1.02	0.30-0.50	4.80-5.50	1.02-1.60	0.50-1.10	0.030	0.010以下

Forging: 1，050-850℃
Anneal: Heat up to 800-850℃ and stay for two hours in this temperature; then cool it slowly in furnace.
Quenching: Heat up to 550-600℃; then secondarily heat up to 850-900℃; and again heat up to a.l000—1.040℃。b.1.040-1．080℃ (oil quenching); (a. flexible tools; b. hot-work hardening tools)
Backfire: Heat up slowly to 550-680℃ and stay in this temperature; then cool in still air and back fire again.
Hardness: below HRC530℃;
Uses: This steel can be resistant to aluminum, magnesium and zinc corrosion, as well as sudden hot alteration, so it is adapted for making aluminum, magnesium and zinc alloy casting dies, hot-work reamers, rolling cutters, scissors and hot-forge punching heads, etc..
Specification: round (MM)
Flat (MM)
26X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
28X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
32X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
35X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
38X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
45X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
50X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
60X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
70X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
80X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
100X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460
200X32-38-45-50-65-75-90-105-130-155-185-205-260-305-360-410-460