A730 Grade D A236,D - ASTM A 730-1993(R1999)

Grade	A730 Grade D
Old Grade
Corresponding Standard	ASTM A 730-1993(R1999) Standard Specification for Forgings, Carbon and Alloy Steel, for Railway Use
Classification	Carbon Steel

A730 Grade D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.4	0.15	0.6	-	-
Maximum Value	0.55	-	0.9	0.045	0.05

A730 Grade D Mechanical Properties

Diameter or Thickness d/t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
d/t≤203	Annealed, normalized, or normalized and tempered ①	≥550	≥275	≥22	≥35
203＜d/t≤356	Annealed, normalized, or normalized and tempered ①	≥550	≥275	≥21	≥33

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