18CrMo4 - UNI 8550-1984

Grade	18CrMo4
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

18CrMo4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.15	0.15	0.6	-	-	0.85	0.15
Maximum Value	0.21	0.4	0.9	0.035	0.035	1.15	0.25

18CrMo4 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	1130~1420	≥880	≥8	KCU ≥25
11<d≤25	835~1130	≥590	≥9	≥30
25<d≤50	735~980	≥540	≥10	≥30

18CrMo4 Corresponding Standards(Same grade name, different standards)

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