50A - CSA G40.21-2004

Grade	50A
Corresponding Standard	CSA G40.21-2004 Structural Quality Steel
Classification	Alloy Steel

50A Chemical Element Composition Content (%)

	Component	C	Si ^ⓑ	Mn ^ⓝ	P	S	Cr ^ⓟ	Ni ^ⓟ	Cu ^ⓓ
①	Minimum Value	-	0.15	0.75	-	-	-	-	0.2
①	Maximum Value	0.2	0.5	1.35	0.03	0.04	0.7	0.9	0.6

	Component	C	Si ^ⓑ	Mn ^*	P	S	Cr ^ⓟ	Ni ^ⓟ	Cu ^ⓓ
②	Minimum Value	-	0.15	0.75	-	-	-	-	0.2
②	Maximum Value	0.2	0.4	1.35	0.03	0.04	0.7	0.9	0.6

50A Mechanical Properties

thickness t in	Tensile Strength σ_b ksi	Yield Point σ_s ksi	Elongation or Extension Rate δ %
t≤4①	70~95	≥50	L0=8in: long.: ≥19 tr.: ≥17 L0=2in: long.: ≥21 tr.: ≥19
Rolled shapes and sheet piling；common shape size group 3	70~95	≥50	L0=8in: ≥19② L0=2in: ≥21
Hollow section	70~95	≥50	L0=2in: ≥21

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

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