60AT - CSA G40.21-2004

Grade	60AT
Corresponding Standard	CSA G40.21-2004 Structural Quality Steel
Classification	Alloy Steel

60AT 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	-	-	-	-	-	0.2
②	Maximum Value	0.2	0.4	1.65	0.03	0.03	0.7	0.9	0.6

60AT Mechanical Properties

thickness t in	Tensile Strength σ_b ksi	Yield Point σ_s ksi	Elongation or Extension Rate δ %
t≤2-1/2①	75~100	≥60	L0=8in: long.: ≥18 tr.: ≥15 L0=2in: long.: ≥21 tr.: ≥18
Rolled shapes and sheet piling；common shape size group 2	75~100	≥60	L0=8in: ≥18② L0=2in: ≥21
Hollow section	75~100	≥60	L0=2in: ≥20

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