50B A70502 - GB /T 3077-2015

50B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	B
Minimum Value	0.47	0.17	0.6	-	-	-	-	-	-	0.0008
Maximum Value	0.55	0.37	0.9	0.03	0.03	0.3	0.3	0.3	0.1	0.0035

50B Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d=25	Quenching + Tempering	≥785	≥540	≥10	≥45	≤207	≥39

50B Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!