50B A70502 - GB /T 11251-2020

Grade	50B
China ISC	A70502
Corresponding Standard	GB /T 11251-2020 Alloy Structural Steel Plate and Strip
Classification	Alloy Steel

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

• The composition shall comply with the provisions of GB/T 3077-2015

50B Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
Annealing	550~750	≥16

• The surface Brinell hardness of steel plates delivered in a high-temperature tempered state shall comply with the provisions of GB/T 3077-2015

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"!