Structural Seamless Pipe

Categories	Mechanical Structure Pipe
Brand Name:	Hengxin Zhicheng
Model Number:	Structural Seamless Pipe
Certification:	ASTM, GB, ISO, etc.
Place of Origin:	CHINA
MOQ:	1 PCE
Price:	Negotiation
Payment Terms:	L/C,T/T
Delivery Time:	10 to 35 days
Packaging Details:	Default bare pipe bundling, or packaging according to customer requirements, such as oil cloth packaging, wooden box packaging, frame packaging

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Wuxi Hengxin Zhicheng International Trade Co., LTD

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Structural Seamless Pipe

Structural Seamless Pipe
Standards:

GB/T8162 —— China national standards
ASTM A53 —— American Materials and Testing institution standards
ASME SA53 —— American Boiler and Pressure Vessel norms

Uses:
For the seamless steel pipes for containers, equipment, pipe, mechanical structures

No. of main production:
10,20,35,45,Q345,15CrMo,12Cr1MoV,A53A,A53B,SA53A,SA53B ect.

Dimensional tolerance:

Pipe types	Outer-caliber(D)		Thickness(S)
	Pipe outer-caliber(mm)	Allowable warp(mm)	Pipe thickness(mm)	Allowable warp(mm)
Hot-rolled pipes	＞219	±1.0％	＞20	±10％

Mechanical Properties:

Standards	Steel pipes No.	Tensile strength(MPa)	Bend strength(MPa)	Elongation(％)
GB/T8162	10	≥335	≥205	≥24
	20	≥390	≥245	≥20
	35	≥510	≥305	≥17
	45	≥590	≥335	≥14
	Q345	≥490	≥325	≥21
	15CrMo	≥440	≥295	≥22
	12Cr1MoV	≥490	≥245	≥22
ASTM A53 ASME SA53	A	≥330	≥205	Table View ASTM A53 Table View ASTM SA53
ASTM A53 ASME SA53	B	≥415	≥240	Table View ASTM A53 Table View ASTM SA53

Chemical composition:

Standards	Steel pipes No.	Chemical composition(％)
Standards	Steel pipes No.	C	Si	Mn	P	S	Cu	Ni	Mo	Cr	V
GB/T8162	10	0.07～0.14	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.15	/
	20	0.17～0.24	0.17～0.37	0.35～0.65	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	35	0.32～0.40	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	45	0.42～0.50	0.17～0.37	0.50～0.80	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	Q345	0.12～0.20	0.20～0.55	1.20～1.60	≤0.035	≤0.035	≤0.25	≤0.25	/	≤0.25	/
	15CrMo	0.12～0.18	0.17～0.37	0.40～0.70	≤0.035	≤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	≤0.035	≤0.25	≤0.30	0.25～0.35	0.90～1.20	0.15～0.30
ASTMA53 ASMESA53	A	≤0.25	/	≤0.95	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08
ASTMA53 ASMESA53	B	≤0.30	/	≤1.20	≤0.05	≤0.06	≤0.40	≤0.40	≤0.15	≤0.40	≤0.08

Structural tubing is a category of hollow steel sections (HSS) manufactured to specific sizes, shapes, and mechanical properties for use in load-bearing applications within construction and various industries. Unlike solid bars, its tubular design offers an exceptional strength-to-weight ratio, making it a fundamental and efficient material for building frameworks, supports, and architectural elements. It is designed to withstand high loads, including tension, compression, and torsional forces.

Materials and Grades

Structural tubing is primarily made from carbon steel, known for its high strength and durability. Common grades include:

ASTM A500: The most prevalent standard for structural tubing in North America, available in Grades A, B, C, and D, with increasing yield strength.

ASTM A1085: A newer standard that offers higher strength and tighter tolerances than A500, promoting more efficient and economical designs.

ASTM A53: A standard for both pressure and structural applications, though more common for piping.

Alloy Steel & Stainless Steel: Used for specialized applications requiring higher corrosion resistance or strength in extreme environments.

These materials can be further enhanced with protective coatings like galvanization (zinc coating) or paint to improve corrosion resistance.

Manufacturing Processes

There are two primary methods for manufacturing structural tubing:

Welded Tube (ERW): Electric Resistance Welded (ERW) tube is formed by rolling steel strip (skelp) into a cylindrical shape and then welding the seam using an electric current. This is a highly efficient process suitable for a wide range of sizes and is the most common type for structural

Applications:

Seamless Tube: Made by piercing a solid billet of steel to form a hollow shell, which is then elongated and rolled to achieve the desired size and wall thickness. Seamless tubing offers superior uniformity in strength around its circumference and is used for highly critical applications but is generally more expensive.

Structural Seamless Pipe

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