Carbon Steel Bar

Carbon steel rails are long, continuous pieces of steel specifically shaped to support and guide trains. The steel used for rails is designed to withstand high stress, impact, and wear. Rails are typically produced through hot rolling processes and are available in various profiles and sizes to accommodate different types of rail systems and loads.

Our carbon steel rails are widely used in railways, ships, bridges, iron towers, coal mines, construction machinery, suspension machinery engineering projects, and we have established stable strategic partnerships with dozens of large enterprises.


Prdouct Name Carbon Steel Bar
Shape Round,Square,Flat,Rectangle,etc.
Material SPA-H, Q355NHB, Q355NHC, Q355NHD, Q355NHE, Q235NHB, 09CuPCrNi-A, Q450NQR1, Q355GNH, Q345NQR2, A588, A242Type1, A606, A871-65, A709-50W, 09CrCuSB, Q345NS, AR 400, AR 450, AR 500, Mn13, ASTM A128, 40Cr, 42Crmo, 65Mn, 15CrMo, 12Cr1mov, 45#, 20#, 35#, 50#, 50Mn, A36, A53GradeA/B, A500 GradeA/B/C/D, A501, A529 Grade50, A618, A992, A514 GradeB/S/H/Q/E/F/A/P, A1011 Grade45/50/70…, SPHC, SPHD, SS400, S235JR, SAE1006, AISI 1008, AISI 1045, C40, C45, C50, Q355qD, Q355qC, Q355qE, S355, S275, Q245R, Q345R, SA387Gr11, SA387Gr22, 15CrMoR, A516 Grade55/60/65/70, A537, TC128-Grade B, A612, A285
Surface Mild steel plain finish, hot dip galvanized, color coated, ect.
Size Tolerance ±3%
Processing method Bending, Welding, Decoiling, Cutting, Punching, Polishing or as customer’s request
Size OD from 10 – 400mm, length from 1m-12m or according to customer’s special request
Technology Hot roll, cold roll, cold drawn, ect.
Trade Term FOB,CIF,CFR,EXW,etc.
Payment T/T,L/C at sight
Lead time Small batch can be in 7 days, depending on the quantity
Certificate ISO9001

Typical Chemistry:

The chemical composition of carbon steel bars can vary depending on the grade and intended use, but generally includes:

  • Carbon (C): 0.05% 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) to enhance specific properties.

Physical Properties:

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

  • Tensile Strength: 400 MPa to 800 MPa.
  • Yield Strength: 250 MPa to 600 MPa.
  • Elongation: 15% to 25%, indicating good ductility.
  • Hardness: Generally between 120-180 HB (Brinell hardness).
  • Density: Approximately 7.85 g/cm³.
  • Thermal Conductivity: Around 50 W/m·K.
  • Modulus of Elasticity: Approximately 210 GPa.


Key features of carbon steel bars include:

  • High Strength: Capable of withstanding high stress and loads.
  • Good Ductility: Can be formed and shaped 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 bars, 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.
  • Surface Finish: Available in various finishes (hot-rolled, cold-drawn, forged) to meet specific requirements.

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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