08Cr4Mo A30081 - GB /T 37618-2019

08Cr4Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.04	0.17	0.85	-	-	3.7	-	-	0.4
Maximum Value	0.12	0.37	1.2	0.03	0.03	4.3	0.3	0.3	0.6

08Cr4Mo Mechanical Properties

test size d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
d=25	Quenching temperature 940~960°C, water cooling; tempering temperature 620~660°C, water or oil cooling	≥800	≥700	≥14	Normalizing + Tempering, Annealing or High Temperature Tempering Condition Delivered Steel Rod ≤220	≥35

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