GB 5310 Seamless Boiler Pipe

GB 5310 seamless pipe’s main application is high pressure pipeline tube in boiler project (superheater tubes, reheater tubes, windpipe), it is featured with high strength and high resistance to corrosive conditions.

Chemical Compositions(%) of GB 5310-2008

Steel grade	C	Si	Mn	P	S	Cr	Mo	Cu	Ni	V
20G	0.17-0.24	0.17-0.37	0.35-0.65	≤0.030	≤0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
20MnG	0.17-0.24	0.17-0.37	0.70-1.00	≤0.030	≤0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
25MnG	0.18-0.24	0.17-0.37	0.80-1.10	≤0.030	≤0.030	≤0.25	≤0.15	≤0.20	≤0.25	≤0.08
15CrMo	0.12-0.18	0.17-0.37	0.40-0.70	≤0.030	≤0.030	0.80-1.10	0.40-0.55	≤0.20	≤0.30
12Cr2MoG	0.08-0.15	≤0.50	0.40-0.70	≤0.030	≤0.030	2.00-2.50	0.90-1.20	≤0.20	≤0.30
12Cr1MoV	0.08-0.15	0.17-0.37	0.40-0.70	≤0.030	≤0.030	0.90-1.20	0.25-0.35	≤0.20	≤0.30	0.15-0.30
12Cr2MoWVTiB	0.08-0.15	0.45-0.75	0.45-0.65	≤0.030	≤0.030	1.60-2.10	0.50-0.65	≤0.20	≤0.30	0.28-0.42
10Cr9Mo1VNb	0.08-0.12	0.20-0.50	0.30-0.60	≤0.020	≤0.010	8.00-9.50	0.85-1.05	≤0.20	≤0.40	0.18-0.25

Mechanical Properties of GB5310-2008：

Steel Grade	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)
20G	410-550	245	24
20MnG	≥415	240	22
25MnG	≥485	275	20
15MoG	450-600	270	22
12CrMoG	410-560	205	21
12Cr2MoG	450-600	280	20
12Cr1MoVG	470-640	255	21
12Cr2MoWVTib	540-735	345	18
10Cr9Mo1VNb	≥585	≥415	≥20