A355 Class D - ASTM A355-1989(R2012)

Grade	A355 Class D
Corresponding Standard	ASTM A355-1989(R2012) Steel Bars, Alloys, for Nitriding
Classification	Alloy Steel

A355 Class D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	Al
Minimum Value	0.33	0.15	0.5	-	-	1	0.15	0.95
Maximum Value	0.38	0.35	0.7	0.035	0.04	1.3	0.25	1.3

A355 Class D Mechanical Properties

Heat Treatment or Condition	Hardness HBW
quenching + temper- ing	Range1: HBW: 223~269 HRC: 19~28 HRB: 98~104 Range2： HBW: 248~302 HRC: 24~32 HRB: 101~107

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