Seamless Steel Pipe

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ASTM A519 4130 Honed Steel Tubing For Hydraulic Cylinder

ASTM A519 4130 Honed Steel Tubing for Hydraulic Cylinders is a seamless American standard steel tube made from 4130 alloy steel through cold drawing or cold rolling. It features high dimensional precision and a superior surface finish, making it suitable for precision components in mechanical structures, hydraulic equipment, and other applications.
1. Standard: ASTM A519
2. Materials: 4130
3. Technical: Cold-drawn seamless
4. Technology: Honed & SRB (Skived and Roller Burnished).
5. Application: Used in hydraulic cylinders for heavy machinery, cranes, excavators, and forklifts.
6. OD: 4-260mm WT: 5-25mm

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ASTM A519 GR.4130 Seamless Alloy Steel Tube

ASTM A519 GR.4130 Seamless Alloy Steel Tube is a seamless chromium-molybdenum alloy structural steel tube specified in the ASTM standard “Seamless Carbon and Alloy Steel Tubes for Machine Use” (A519/A519M). “4130” is the SAE/AISI steel grade (UNS G41300), specifically designed for manufacturing mechanical parts subjected to high stress and requiring good comprehensive mechanical properties.

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ASTM A519 GR.4140 Seamless Alloy Steel Tube

ASTM A519 GR.4140 Seamless Alloy Steel Tube is an American standard medium-carbon chromium-molybdenum alloy seamless steel tube, corresponding to the domestic grade 42CrMo. It possesses high strength, high hardenability, and good toughness. This material is commonly used to manufacture high-load-bearing mechanical parts, such as drive shafts, gears, and oil drilling tools.

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ASTM A53 Steel Pipe

ASTM A53 Steel Pipe is a carbon steel pipe standard developed by the American Society for Testing and Materials (ASTM). Its full name is “ASTM A53 – Seamless and Welded Steel Pipe.” It is primarily classified into two types:
1. ASTM A53 Steel Pipe Seamless (Type S): Produced through hot rolling or cold drawing, it has no welds and offers enhanced pressure resistance, making it suitable for high-pressure applications.
2. ASTM A53 Steel Pipe Welded (Type E/F): Type E is electric resistance welded (ERW), while Type F is furnace welded. These are lower-cost and primarily used for low-pressure fluid transportation.

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Cold Drawn Carbon Steel Hexagonal Tube

Cold Drawn Carbon Steel Hexagonal Tube is a type of hexagonal steel tube. Hexagonal tube, also known as hexagonal steel tube, is a special-shaped steel tube with a hexagonal cross-section made of steel. This tube is widely used in mechanical accessories, building structures, automobile and shipbuilding, etc., covering a specification system with a cross-sectional size of 12.7-400mm and a wall thickness of 0.6-20mm.

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DIN2391 ST52 Honed Tube and Pipes

DIN2391 ST52 Honed Tube and Pipes are high-precision cold-drawn seamless steel tubes widely used in hydraulic systems, construction machinery, and automotive precision components. They conform to DIN2391-1 or GB3639-83 standards. Made primarily of carbon steel, DIN2391 ST52 Honed Tube and Pipes undergo cold drawing/cold rolling, pickling, and phosphating processes. They exhibit high precision (inner diameter accuracy up to ±0.02-0.05mm) and low surface roughness, and are capable of withstanding high pressures and resisting deformation.

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EN 10305-1 E355 Hydraulic Cylinder Honed Steel Pipe

EN 10305-1 E355 Hydraulic Cylinder Honed Steel Pipe is processed through cold drawing and hot rolling, achieving high precision and strength, making it suitable for mechanical structural components and hydraulic equipment. Hydraulic Cylinder Honed Steel Pipe is available in a wide range of specifications, with inner diameters ranging from 20mm to 400mm and wall thicknesses ranging from 3mm to 50mm.

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Galvanized Rectangular Tube

Galvanized rectangular tube are also called flat tubes, flat square tubes or square flat tubes. They are hollow long steel strips with rectangular cross-sections. They belong to cold-bent hollow steel sections.

Galvanized rectangular tubes are made of strip steel. After unpacking, flattening, curling, and welding into round tubes, they are rolled into square rectangles. The surface galvanized layer can form an oxide protective layer.

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Galvanized Square Steel Tube

Galvanized Square Steel Tube is a hollow square section steel tube with square cross-section shape and size made of hot-rolled or cold-rolled galvanized strip steel or galvanized coil as blank, cold-bent and then welded by high-frequency welding, or a galvanized square tube made of pre-made cold-bent hollow steel tube by hot-dip galvanizing.

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Honed Steel Tube

Our factory produces and sells various specifications and models of honed steel tube, including precision honed steel tubing, Hydraulic Cylinder Steel Pipe, Hydraulic Honing Steel Pipe, large-diameter honed steel tubes, and small-diameter honed steel pipe.
Our factory has six honed steel tube production lines capable of processing 12-1100mm honed steel tube (for model aircraft and cylinder tubes). The honed steel tubes (for model aircraft and cylinder tubes) produced by our factory typically achieve a roughness of Ra ≤ 0.08μm, correct roundness, and ovality ≤ 0.01mm. This improves surface hardness, eliminates stress-induced deformation, and increases hardness to HV ≥ 4°. A residual stress layer is formed after processing, increasing fatigue strength by 30%, improving fit quality, reducing wear, and extending component life.

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Hydraulic Cylinder Steel Pipe

Hydraulic cylinder steel pipe, also known as honing pipe, is a core component for transmitting high-pressure fluids in hydraulic systems. It is a cold-drawn or cold-rolled precision seamless steel pipe. Hydraulic cylinder steel pipe is primarily made of carbon steel (such as ST35 and ST45), alloy steel, and 304L stainless steel. It is widely used in hydraulic cylinders, pneumatic cylinders, construction machinery, and automotive precision components.

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Hydraulic Honing Steel Pipe

Hydraulic Honing Steel Pipe is a precision pipe manufactured through a honing process. Its interior surface undergoes a special treatment, resulting in exceptionally high smoothness and dimensional accuracy. Honing is a combined grinding and polishing process that effectively removes microscopic irregularities on the pipe’s interior surface, resulting in a mirror-like finish. Hydraulic Honing Steel Pipe is typically made from high-quality alloy steel or stainless steel and undergoes multiple processing steps to meet the needs of diverse industrial applications.

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Inner Hexagonal Steel Pipe

Inner Hexagonal Steel Pipe is a seamless steel pipe with a circular outer surface and a hexagonal inner surface. It is mainly used to connect, support and fix various mechanical equipment, with high strength, rigidity and stability. Inner Hexagonal Seamless Steel Pipe has a wide range of uses, including but not limited to structural support (such as bridges, high-rise buildings and industrial facilities), automobile manufacturing (such as chassis, suspension systems and engine mounts), aerospace (such as aircraft frames and rocket engine mounts), shipbuilding, pipeline support, agricultural machinery and decoration industries, etc.

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Oval Carbon Steel Pipe

Oval Carbon Steel Pipe is a kind of carbon steel pipe with an oval cross section. When manufacturing Oval Carbon Steel Pipes, the steel in a high temperature state is first molded into an oval shape, and then processed into a tubular product. Compared with ordinary round steel pipes, Oval Carbon Steel Tube is more beautiful in appearance and has higher bending strength and compressive strength.

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Pipeline Steel Pipe

Pipeline steel pipes are pressure-bearing steel pipes specifically designed for transporting fluids such as oil, natural gas, and water. Their core characteristics are high strength, high toughness, good weldability, and corrosion resistance.

Pipeline steel pipes are mainly divided into seamless pipes and welded pipes (straight seam/spiral welded pipes), conforming to API SPEC 5L or GB/T 9711 standards, with steel grades such as X42–X120 (yield strength 290–830 MPa).

API SPEC 5L-2011 (Specification for Line Pipe), compiled and published by the American Petroleum Institute, is commonly used around the world. The main material of the pipe is L245, L290, L360, L415, L480, GR.B, X42, X46, X56, X65, X70, X80, X100 and other steel grades

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Rectangular Steel Pipe

Rectangular Steel Pipe is a hollow long steel tube, also known as flat tube, flat square tube or square flat tube (as the name implies). When the bending and torsional strengths are the same, the weight is lighter, so Rectangular Steel Tube is widely used in the manufacture of mechanical parts and engineering structures.
Classification of Rectangular Steel Pipes: Steel pipes are divided into seamless steel pipes and welded steel pipes (seam pipes), hot-rolled seamless square pipes, cold-drawn seamless square pipes, extruded seamless square pipes, and welded square pipes.

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Schedule 40 Steel Pipe

Schedule 40 Steel Pipe is a commonly used wall thickness grade in American Standard piping systems. It has clear pressure standards and application specifications and is widely used in industries such as the petroleum and chemical industries. SCH40 Steel Pipe is available in welded, seamless, and galvanized versions, depending on the production standards and intended use.

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Seamless Steel Pipe

Seamless steel pipes are long, hollow steel strips without weld seams, renowned for their high strength, pressure resistance, corrosion resistance, and structural uniformity. They are classified by manufacturing process into hot-rolled seamless steel pipes and cold-drawn (rolled) seamless steel pipes, and by application and material into various types such as structural, fluid transport, boiler, petroleum cracking, and stainless steel.

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SHS Steel Square Hollow Section

SHS Steel Square Hollow Section is a steel pipe with a square cross-section.
Square steel pipe, a steel pipe with a square cross-section, plays an important role in many fields such as construction, machinery manufacturing and steel structure engineering. There are many types of square steel pipes, which can be divided into many types according to different manufacturing processes and specific uses. These different types of square steel pipes can show unique functions and advantages in their specific applications, providing reliable support and protection for various projects.

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Special-shaped Steel Pipe

Special-shaped steel pipe are seamless steel pipes made of various special shapes by cold drawing. Special-shaped seamless steel pipes are the general term for seamless steel pipes with other cross-sectional shapes except round pipes. According to the different cross-sectional shapes and sizes of steel pipes, they can be divided into equal wall thickness special-shaped seamless steel pipes, unequal wall thickness special-shaped seamless steel pipes, and variable diameter special-shaped seamless steel pipes.

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