18NiCrMo5 - UNI 8550-1984

Grade	18NiCrMo5
Corresponding Standard	UNI 8550-1984 Specification Unalloyed and Alloyed Steel Finished Products, Open Die and Drop Forged, for Case Hardening - Qualities, Requirements and Tests
Classification	Alloy Steel

18NiCrMo5 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.15	0.15	0.6	-	-	0.7	1.2	0.15
Maximum Value	0.21	0.4	0.9	0.035	0.035	1	1.5	0.25

18NiCrMo5 Mechanical Properties

thickness/diameter t/d mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
d≤11	1225~1520	≥980	≥8	KCU ≥30
11<d≤25	1030~1325	≥785	≥9	≥32.5
25<d≤40	930~1230	≥735	≥9	≥32.5
40<d≤100	785~1080	≥590	≥10	≥35

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