GB 5310 High pressure boiler tube

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

(EN 10216-2:2002, Seamless steel tubes for pressure purposes-Technical delivery conditions-Part2: Non-alloy and alloy steel tubes with specified elevated temperature properties，NEQ)

20G seamless steel pipe is a high-quality carbon structural steel, boiler material, the carbon content of 0.17-0.24%, tensile strength of 410Mpa, yield point 230-250Mpa. Is our main production of steel, we can provide 20G Seamless pipe with high quality and competitive price. Here to introduce you to our 20G seamless pipe basic chemical properties and mechanical properties.

Chemical Compositions(%) of GB 5310-2008:

Steel Grade	C	Si	Mn	S	P	Cr	Mo	V	Ti	B	W	Ni	Al	Nb	N
20G	0.17-0.23	0.17-0.37	0.35-0.65	0.015	0.025
20 MnG	0.17-0.24	0.17-0.37	0.70-1.00	0.015	0.025
25 MnG	0.22-0.27	0.17-0.37	0.70-1.00	0.015	0.025
15 MoG	0.12-0.20	0.17-0.37	0.40-0.80	0.015	0.025		0.25-0.35
20 MoG	0.15-0.25	0.17-0.37	0.40-0.80	0.015	0.025		0.44-0.65
12CrMoG	0.08-0.15	0.17-0.37	0.40-0.70	0.015	0.025	0.40-0.70	0.40-0.55
15CrMoG	0.12-0.18	0.17-0.37	0.40-0.70	0.015	0.025	0.80-1.10	0.40-0.55
12Cr2MoG	0.08-0.15	≤0.60	0.40-0.60	0.015	0.025	2.00-2.50	0.90-1.13
12Cr1MoVG	0.08-0.15	0.17-0.37	0.40-0.70	0.010	0.025	0.90-1.20	0.25-0.35	0.15-0.30
12Cr2MoWVTiB	0.08-0.15	0.45-0.75	0.45-0.65	0.015	0.025	1.60-2.10	0.50-0.65	0.28-0.42	0.08-0.18	0.002-0.008	0.30-0.55
10Cr9Mo1VNbN	0.08-0.12	0.20-0.50	0.30-0.60	0.010	0.020	8.00-9.50	0.85-1.05	0.18-0.25				≤0.040	≤0.040	0.06-0.10	0.03-0.07

Mechanical Properties of GB5310-2008：

Grade	Tensile strength (Mpa)	Yield point(Mpa) not less than	Elongation(%) not less than	Impact(J) not less than
20G	410-550	245	24/22	40/27
25MnG	485-640	275	20/18	40/27
15MoG	450-600	270	22/20	40/27
20MoG	415-665	220	22/20	40/27
12CrMoG	410-560	205	21/19	40/27
12 Cr2MoG	450-600	280	22/20	40/27
12 Cr1MoVG	470-640	255	21/19	40/27
12Cr2MoWVTiB	540-735	345	18	40/27
10Cr9Mo1VNb	≥585	415	20	40
1Cr18Ni9	≥520	206	35
1Cr19Ni11Nb	≥520	206	35

The W.T. tolerance of GB5310：

W.T.(S)		Tolerance of W.T.
<3.5		+15%(+0.48mm min)
		-10%(+0.32mm min)
3.5-20		+15%,-10%
>20	D<219	±10%
	D≥219	+12.5%,-10%

Additional Condition

• UT(Ultrasonic examination),
• AR(As Hot Rolled only)
• TMCP(Thermal Mechanical Control Processing)
• N(Normalized)
• Q+T(Quenched and Tempered)
• Z Direction Test(Z15,Z25,Z35)
• Charpy V-Notch Impact Test
• The Third Party Test (such as SGS Test)
• Coated or Shot Blasting and Painting.

GB 5310 High pressure boiler tube Application

• GB5310 20G seamless steel pipes are mainly used for pressure vessels, machinery, pipe fittings, oil and chemical industry.
• GB 5310 High pressure boiler tube Other Name
• GB 5310 High pressure boiler tube, 20G boiler steel pipe, 20G boiler pipe

Boiler tubing is used in these industries:

• Steam Boilers
• Power Generation
• Fossil Fuel Plants
• Electric Power Plants
• Industrial Processing Plants
• Cogeneration Facilities