Carbon Steel Pipe

Carbon steel pipes are tubular products made from carbon steel, a type of steel that contains carbon as the main alloying element. They are produced through various manufacturing processes, such as seamless, welded (ERW, LSAW, SSAW), and are available in various sizes and thicknesses to suit different applications. These pipes offer a good balance of strength, ductility, and toughness, making them suitable for high-stress environments.


Product NameCarbon steel pipe
Outer Diameter

Round, Hexagonal, Square, Flat, other shapes can be customized

Rectangular pipe: 20*40mm~300*500mm

Wall ThicknessSquare and rectangular pipe: 0.8~20mm
Length3-12M according to client requirement
StandardHollow section: ASTM A500, EN10219, EN10210, JIS3466, GB/T 6728
MaterialGr.A, Gr.B, Gr.C, S235, S275, S355, A36, SS400, Q195, Q235, Q345
CertificateISO 9001:2008, BV, CCIC etc

Typical Chemistry:

The chemical composition of carbon steel pipes can vary, but generally includes:

  • Carbon (C): 0.04% to 0.30%
  • Manganese (Mn): 0.30% to 1.65%
  • Silicon (Si): 0.10% to 0.50%
  • Phosphorus (P): ≤ 0.05%
  • Sulfur (S): ≤ 0.05%
  • Additional Elements: Trace amounts of elements like copper (Cu), chromium (Cr), molybdenum (Mo), and nickel (Ni) may be present to enhance specific properties.

Physical Properties:

The physical properties of carbon steel pipes depend on the grade and manufacturing process, but typically include:

  • Tensile Strength: 340 MPa to 620 MPa.
  • Yield Strength: 205 MPa to 450 MPa.
  • Elongation: 20% to 30%, indicating good ductility.
  • Hardness: Generally between 100-180 HB (Brinell hardness).
  • Density: Approximately 7.85 g/cm³.
  • Thermal Conductivity: Around 50 W/m·K.
  • Modulus of Elasticity: Approximately 210 GPa.

Available Grade List:

Carbon Steel International Standard Applications
Standard Grade
Hot Rolled Mild Steel JIS G3131 SPHC Suitable for the manufacture of cold formed parts.
DIN 1614 (EN10111) StW22 (DD11)
STW23 (DD12)
StW24 (DD13)
General Structural Steel JIS G3101 SS 330 Used for general structural parts such as buildings, bridges, ships, vehicles, etc.
SS 400
SS 490
SS 540
DIN 17100 (EN10025) St 33 (S185)
St 37-2 (S235JR)
St 37-3 (S235JO)
St 44-2 (S275JR)
St 50-2 (E295)
St 52-3 (S355JO)
Welded Structural Steel JIS G3106 SM400A It is used for structural parts requiring excellent welding performance such as buildings, bridges, ships, vehicles, petroleum tanks, engineering machinery, etc.
NSC Welten590RE Weldable high-strength steel plates are used for pressure vessels, oil tanks, engineering machinery, mining machinery, pressure water pipes, etc.
Mechanical Structural Steel DIN 17200 C22 It is used for mechanical structural parts that have been processed by cutting and heat treatment.
JIS G4501 C35
Fine Grained Structural Steel DIN 17102 StE255 Fine grain structural steel suitable for welding.
Steel Strip For Steel Pipe JIS G3132 SPHT1 For welded steel pipes.
Automobile Structural Steel JIS G3113 SAPH 310 Used for automobile structural parts such as automobile frames and wheels that require formability and processing performance.
SAPH 370
SAPH 400
SAPH 440
SEW 092 (EN10149-2) QStE 340TM Hot-rolled grain steel for cold deformation is used for structural parts such as automobile girders that require good cold forming performance and high or high strength requirements.
QStE 380TM
QStE 420TM (S420MC)
QStE 460TM (S460MC)
QStE 500TM (S500MC)
Steel For Boilers And Pressure Vessels DIN 17155 (EN10028-2) HII (P265GH) In addition to ensuring normal temperature performance, it also ensures mechanical properties at higher temperatures. It is suitable for steam boiler equipment, pressure vessels with higher operating temperatures and similar structural parts.
19Mn6 (P355GH)
JIS G3103 SB410
JIS G3116 SG295 Welding steel plates for gas cylinders.
Steel For Hull Structure LR,BV A It can be supplied according to the specifications of classification societies of various countries.
ABS ship regulations D
Atmospheric Corrosion Resistant Steel SEW087 (EN10155) WTSt37-2 (S235J2W) It is used to manufacture structural parts such as containers, railway vehicles, oil derricks, engineering machinery, etc. that require resistance to atmospheric corrosion, interception and fuel.​
WTSt52-3 (S355J2G1W)
NAW 490
Sulfuric Acid Corrosion Resistant Steel NSC S-ten2 Used to make containers containing hydrogen sulfide media, etc.
Seawater Corrosion Resistant Steel Mariloy G41A Used for structural components such as oil production platforms, ships, and harbor buildings.
Mariloy S50A
Case-Hardened Steel DIN 17210 C10 High-purity low-carbon steel is used for surface carburizing or nitriding and then quenching and hardening to produce structural parts with high hardness and wear resistance on the surface and high toughness in the core.
JIS G4051 S09CK
High Toughness Pipeline Steel API 5L X60 High-toughness pipeline steel for spiral welding production of hot-rolled wide-band steel for oil pipelines
Straight Seam Welded Casing Steel API 5CT J55 For manufacturing straight seam welded petroleum casing pipes
Hot Rolled Coils For Pipelines API 5L Grade A,B For oil and natural gas transmission pipes


Key features of carbon steel pipes include:

  • High Strength: Capable of withstanding high pressure and heavy loads.
  • Good Ductility: Can be bent and formed into various shapes without breaking.
  • Versatility: Suitable for a wide range of applications in different industries.
  • Durability: Resistant to wear and tear, providing long service life.
  • Cost-Effectiveness: Generally cheaper than alloy and stainless steel pipes, offering good value for money.
  • Weldability: Can be easily welded, allowing for strong and secure joints.
  • Machinability: Can be easily cut, drilled, and machined to required dimensions.
  • Availability: Widely available in various sizes, lengths, and grades to meet specific needs.

Our Certifications

Packaging and Shipping

1. Wood pallet packing cover with water-proof paper
2. Steel pallet packing cover with water-proof paper
3. Wood box packing
4. Steel pallet packing cover with steel box
5. In bundles with steel strip no extra packing

package and shipment


  • High Precision Dimension: The carbon steel profile has excellent processing technology good molding and easy welding. Thickened material, stable performance, and high hardness, not easy to rust.
  • Low Friction: Low dissipation factor. More durable than most ordinary domestic bearings. Lower operating costs​
  • Life Is Long: High-quality steel through strict quality inspection, quality control layer-by-layer detection, and reliable quality, long service life.
  • Customization: Drawings and samples can be processed and customized. Conventional large-scale spot, non-standard customization.
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