C 15 - UNI 8550-1984

Grade	C 15
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	Carbon Steel

C 15 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.12	0.15	0.3	-	-
Maximum Value	0.18	0.35	0.6	0.035	0.035

C 15 Mechanical Properties

thickness or 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	735~1180	≥440	≥9	KCU ≥22.5
11<d≤25	540~785	≥345	≥11	≥30
25<d≤40	490~735	≥295	≥14	≥35

C15 Corresponding Standards(Same grade name, different standards)

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