鞍鋼q345e低溫管gb/t18984-2016

標(biāo)準(zhǔn)	外徑公差		壁厚公差
GB/T8163-1999	D<50mm	±0.50mm	+15/-12.5%	最�。�+0.45mm
	D≥50mm	±1%
最�。�-0.40mm

標(biāo)準(zhǔn)	牌號	C	Si	Mn	P≤	S≤	Ni≤	Cu≤	Cr≤
GB/T8163-1999	10	0.07-0.14	0.17-0.37	0.35-0.65	0.035	0.035	0.25	0.15	0.25
	20	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.25	0.25	0.25
	Q295 A	≤0.16	≤0.55	0.80-1.50	0.045	0.045	0.30	0.30	0.30
	Q295 B	≤0.16	≤0.55	0.80-1.50	0.040	0.040	0.30	0.30	0.30
	Q345 A	≤0.20	≤0.55	1.00-1.60	0.045	0.045	0.30	0.30	0.30
	Q345 B	≤0.20	≤0.55	1.00-1.60	0.040	0.040	0.30	0.30	0.30
	Q345 C	≤0.20	≤0.55	1.00-1.60	0.035	0.035	0.30	0.30	0.30
	Q345 D	≤0.18	≤0.55	1.00-1.60	0.030	0.030	0.30	0.30	0.30
	Q345 E	≤0.18	≤0.55	1.00-1.60	0.025	0.025	0.30	0.30	0.30