320 Ship Used Seamless Steel Pipe

Detailed Description:
Size & Tolerance

Type	Outside Diameter		Wall Thickness
Hot Rolled	Outside Diameter(mm)	Tolerance(mm)	Wall Thickness(mm)	Tolerance(mm)
	>30-50	±-0.3	≤30	±10%
	>50-219	±0.8%
Cold Drawn	>219	±1.0%	>20	±10%

Mechanical Properties

Standard	Material	T.S(MPa)	Y.S(MPa)	L(%)
GB/T5312	320	320-410	≥195	≥25
	360	360-480	≥215	≥24
	410	410-530	≥235	≥22
	460	460-580	≥265	≥21
	490	490-610	≥285	≥21

Chemical Composition

Standard	Material	Chemical Composition(%)
		C	Si	Mn	P	S
GB/T5312	320	≤0.16	≤0.35	0.40-0.70	≤0.035	≤0.035
	360	≤0.17	≤0.35	0.40-0.80	≤0.035	≤0.035
	410	≤0.21	≤0.35	0.40-1.20	≤0.035	≤0.035
	460	≤0.22	≤0.35	0.80-1.40	≤0.035	≤0.030
	490	≤0.23	≤0.35	0.80-1.50	≤0.035	≤0.030