Seamless Carbon steel tubes for high-pressure boiler.
for the minimum wall thinking seamless carbon steel boiler and superheater tubes for high-pressure service.
Size: O.D.:6.0-114.0(mm) W.T.:1-15(mm) L.:max12000mm
	Composition
	C		Mn		P(min)	S(min)	Si(min)
	0.06-0.18		0.27-0.63		0.035	0.035	0.25
	Hardness Required
	Brinell Hardness Number			Rockwell Hardness Number
	WT≧5.1mm			WT≧5.1mm
	137 HRB			77HRB