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Home / Products / Steel Pipe / Seamless Steel Pipe / GB/T8162 Seamless Steel Pipe

GB/T8162 Seamless Steel Pipe

This standard applies to seamless steel tubes for general structural and mechanical structures. The main production of steel pipe grade includes Gr 10, Gr 20, Gr 35, Gr 45, Q345, 15CrMo, and 12Cr1MoV.

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PRODUCT PARAMETERS

Carbon Steel: Properties, Production, Examples and Applications

Name: GB/T8162 Seamless Steel Pipe
SKU: 0

Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.

Types of carbon steel and their properties

Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel . Their carbon content, microstructure and properties compare as follows:

Carbon content (wt.%)	Microstructure	Properties	Examples
Low-carbon steel	< 0.25	Ferrite, pearlite	Low hardness and cost. High ductility, toughness, machinability and weldability
Medium-carbon steel	0.25 – 0.60	Martensite	Low hardenability, medium strength, ductility and toughness
High-carbon steel	0.60 – 1.25	Pearlite	High hardness, strength, low ductility

Carbon Steel Description

Grade:

1)GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E

2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q

3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80

4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE

PRODUCT DETAILS

GB/T8162 is a standard seamless pipe, suitable for seamless pipes in general structures and mechanical structures. The parts after quenching and tempering of GB/T8162 seamless steel pipe have good comprehensive mechanical properties and are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads. However, the surface hardness is low and not wear-resistant. Quenching and tempering, as well as surface quenching can be used to improve the surface hardness of the parts.

Product Parameters

Product Name	GB/T8162 Seamless Steel Pipe
Standard	EN/DIN/JIS/ASTM/BS/ASME/AISI etc.
Outer Diameter	Seamless: 1/4"-36"	Welding: 21.3mm-3620mm
	Round Tube: 1/2"-10"	Square Tube/Rectangular Tube: 15x15mm-400x600mm
Wall Thickness	Seamless: 1.25mm-50mm	Welding: 1.65mm-65mm
Length	3-12 meters, Support customization
Surface Process	Bright, Polished, Black
Other Services	Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

Chemical Composition

Grade	C	Si	Mn	P, S	Cu	Ni	Mo	Cr
10	0.07-0.14	0.17-0.37	0.35-0.65	≤ 0.035	≤ 0.25	≤ 0.25	/	≤ 0.15
20	0.17-0.24	0.17-0.37	0.35-0.65	≤ 0.035	≤ 0.25	≤ 0.25	/	≤ 0.25
35	0.32-0.40	0.17-0.37	0.50-0.80	≤ 0.035	≤ 0.25	≤ 0.25	/	≤ 0.25
45	0.42-0.50	0.17-0.37	0.50-0.80	≤ 0.035	≤ 0.25	≤ 0.25	/	≤ 0.25
16Mn	0.12-0.20	0.20-0.55	1.20-1.60	≤ 0.035	≤ 0.25	≤ 0.25	/	≤ 0.25
12CrMo	0.08-0.15	0.17-0.37	0.40-0.70	≤ 0.035	≤ 0.25	≤ 0.30	0.40-0.55	0.40-0.70
15CrMo	0.12-0.18	0.17-0.37	0.40-0.70	≤ 0.035	≤ 0.25	≤ 0.30	0.40-0.55	0.80-1.10
12Cr1MoV	0.08-0.15	0.17-0.37	0.40-0.70	≤ 0.035	≤ 0.25	≤ 0.30	0.25-0.35	0.90-1.20

Mechanical Properties

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
10	≥ 335	≥ 205	≥ 24
20	≥ 390	≥ 245	≥ 20
35	≥ 510	≥ 305	≥ 17
45	≥ 590	≥ 335	≥ 14
16Mn	≥ 490	≥ 325	≥ 21
12CrMo	≥ 410	≥ 265	≥ 24
15CrMo	≥ 440	≥ 295	≥ 22
12Cr1MoV	≥ 490	≥ 245	≥ 22

Scope of Application

Seamless steel tubes for the manufacture of pipes, vessels, equipment, fittings and mechanical structures

PRODUCT DISPLAY

We adopt high standard production processes, select high-quality steel raw materials, and provide diverse product specifications and models. All steel products have passed strict quality testing, with smooth and even surfaces, precise dimensions, excellent compressive strength, corrosion resistance, and processability. Support customized thickness, length, and special process requirements to meet different usage standards in different scenarios. Clear display of high-definition detailed images and technical parameter tables of the physical object, ensuring transparent and visible quality.

PRODUCT APPLICATION

This product is widely used in the fields of building structures, mechanical manufacturing, automotive parts, energy equipment, and home hardware, and is suitable for scenarios such as load-bearing frames, precision parts, and industrial pipelines. With excellent physical performance and stability, it can easily meet the demands of high strength, high wear resistance, and extreme environments. Support collaboration with engineering teams to provide material selection suggestions and assist clients in efficiently implementing their projects.

PRODUCT PACKAGING

Adopting a professional industrial packaging solution that is moisture-proof and scratch resistant, each batch of steel is tied and fixed with customized wooden frames/steel strips, combined with anti rust coatings and cushioning pads to ensure zero damage during transportation. Clear product model, batch number, and storage identification on the outer packaging, supporting customized enterprise logos and information labels. Environmentally friendly and recyclable packaging materials practice green concepts, reducing transportation and disassembly costs.

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