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GB6479 Seamless Steel Pipe

2021-12-09

GB6479-2013
Standard Specification for seamless steel tubes for high pressure fertilizer equipment

GB6479-2013 Seamless steel pipe for high-pressure fertilizer equipment, suitable for high-quality carbon structural steel and alloy steel seamless steel pipe for chemical equipment and pipeline with working temperature of -40~400 °C and working pressure of 10~30Ma.

Application:

GB6479 steel pipe is mainly used for high-pressure fertilizer equipment and seamless steel pipe for pipelines.

Executive standard: GB6479-2013

Product Name: Seamless steel pipe for high pressure fertilizer

Steel grade:10, 20, Q345B/C/D/E, 12CrMo, 15CrMo, 12Cr2Mo, 12Cr5Mo, 10MoWVNb, 12SiMoVNb, etc.

GB6479 seamless steel pipe Quick Details

Type:Seamless Steel Pipe.

Material: 10, 20, Q345B/C/D/E, 12CrMo, 15CrMo, 12Cr2Mo, 12Cr5Mo, 10MoWVNb, 12SiMoVNb, etc.

Wall thickness(WT): 4.5-19mm.

Outer diameter (OD): 45-323mm

Length: 6M or specified length as required.

Ends: Plain End, Beveled End, Treaded

FOB Price: US $650-1400 / Ton | 1 Ton/Tons (Min. Order)

Additional Info

Port of Shipment: Tianjin, China

Payment Terms:T / T, LC

Delivery: 7-15 days after payment

Surface: Tubes will be varnished (Outside only) to prevent rust.

Marking: Standard + Steel Grade + Size + Heat No + Lot No

Package:Standard export package,suit for all kinds of transport, or as required

Chemical composition of GB6479 Seamless Steel Pipe

Standard	Grade	Chemical composition(%)
Standard	Grade	C	Si	Mn	P	S	Cr	Mo	Ni
GB 6479	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.030	≤0.030	/	/	/
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.030	≤0.030	/	/	/
	16Mn	0.12～0.20	0.20～0.60	1.20～1.60	≤0.030	≤0.030
	10MoWVNb	0.07～0.13	0.50～0.80	0.50～0.80	≤0.030	≤0.030	/	0.60～0.90	/
	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	/
	1Cr5Mo	≤0.15	≤0.50	≤0.60	≤0.030	≤0.030	4.00～6.00	0.45～0.60	≤0.60
	12 Cr2Mo	0.80～0.15	≤0.50	0.40～0.70	≤0.030	≤0.030	2.0～2.50	0.90～1.20

Note:
The residual element content of 10 is Ni≤0.25%, Cr≤0.15%, Cu≤0.20%

The residual element content of 20 is Ni≤0.25%, Cr≤0.25%, Cu≤0.20%, Mo≤0.15%, V≤0.08%

Other residual element content Ni≤0.30%, Cr≤0.30%, Cu≤0.20%

Mechanical properties of GB6479 Seamless Steel Pipe

Standard	Grade	Tensile strength (MPa)	Yield strength (MPa)	Elongation(%)	Impact work (J)	Low temperature impact Akv
GB6479	10	335～490	≥205	≥24	/	－20℃≥18
	20	410～550	≥245	≥24	≥39	－20℃≥18
	16Mn	490～670	≥320	≥21	≥47	－40℃≥21
	10MoWVNb	470～670	≥295	≥19	≥62
	15CrMo	440～640	≥235	≥21	≥47
	1Cr5Mo	390～590	≥195	≥22	≥94
	12 Cr2Mo	450～600	≥280	≥20	≥38

Tolerances of outer diameter and wall thickness

steel pipe	Outer diameter (OD)		wall thickness(WT)
cold drawn pipe	Outer diameter(mm)	tolerance	wall thickness(mm)	tolerance
	＞30～50	±0.3	≤30	±10％
	＞50～219	±0.8％	≤30	±10％
hot rolled pipe	＞219	±1.0％	＞20	±10％

Testing test

Tensile test, hydrostatic test, flattening test, flare test, cold bend test.

Steel pipe weight calculation formula: [(outer diameter - wall thickness) * wall thickness] * 0.02466 = kg / m (weight per meter)

Steel pipe production process: hot rolling, cold drawing

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