Wholesale Carbon Steel Plate from China Manufacturer

Lingchuang's carbon steel plate factory regularly stocks Q235B ordinary carbon steel plate, Q355B low alloy manganese steel plate, 20# high-quality carbon steel plate, and 45# medium carbon steel plate. We also offer cold-rolled carbon steel plate, container plates, checkered plates, and other specialty plates to meet the needs of various applications in construction, machinery, chemical, and steel structure industries. As a leading manufacturer in China, we support carbon steel plate bending, forming, rolling, and end cap fabrication. We can process tanks, pipe fittings, irregularly shaped steel structures, and bridge embedded parts, providing one-stop forming and processing services.

Based on production processes and thickness, carbon steel plates can be divided into hot-rolled plates, cold-rolled plates, pickled plates, and plates of various thicknesses. Hot-rolled steel sheets are thick, affordable, and come in a wide range of sizes, including medium, medium-thick, and extra-thick plates. They are suitable for steel structures, tank fabrication, heavy equipment foundations, and irregular cutting. Cold-rolled steel sheets have a smooth surface, high precision, and good toughness. They are mostly thin sheets used for appliance housings, chassis and cabinets, hardware stamping parts, and automotive interior parts. Pickled steel sheets have no thick oxide scale and fall between hot-rolled and cold-rolled sheets. They are suitable for automotive parts, agricultural machinery parts, and mass-produced hardware processing. Different thicknesses of steel sheets cater to a full range of needs, from light decorative to heavy load-bearing applications.

Performance advantages and application comparison table

What are the differences between 20#, 45# carbon steel sheets and ordinary Q235 sheets?

Q235 is a common carbon structural sheet. It offers high cost-effectiveness, good plasticity, and excellent weldability, but its strength and hardness are average, and its impurity content is slightly higher. It is suitable for conventional structural applications such as building steel structures, embedded parts, guardrails, and ordinary equipment housings.

20# is a high-quality low carbon steel plate, with a purer material and lower sulfur and phosphorus impurities. Its toughness, ductility, and pressure resistance are far superior to Q235, and its processing performance is better. It is suitable for bending and stamping, boiler parts, pressure vessels, and precision mechanical parts.

45# is a medium-carbon steel plate, with the highest strength, hardness, and wear resistance. It can undergo quenching and tempering heat treatment and has strong load-bearing capacity, but its weldability is poor, making it unsuitable for large-area welding. It is mostly used for heavy-duty wear-resistant machined parts such as mechanical shafts, gears, flange blanks, and mold base plates.

What is the difference between carbon steel cut-out plates and original plates? Which is better?

Original plates are directly rolled by the steel mill, resulting in uniform thickness, a flat surface, low internal stress, and less deformation. The material properties are more stable, making them suitable for load-bearing structures, precision machining, and high-standard projects. However, they are more expensive. Cut-out plates are made by cutting hot-rolled steel coils. They offer flexible specifications, high cost-effectiveness, and convenient sourcing, but the thickness tolerance is slightly larger, the flatness is slightly inferior, and they are more prone to slight deformation. For ordinary construction and general material cutting, flat plates are sufficient. For important load-bearing projects, original flat plates should be prioritized.

What anti-corrosion treatment is required for carbon steel plates used outdoors?

For carbon steel plates used outdoors, hot-dip galvanizing is recommended for corrosion protection, ensuring a long service life. Standard treatment includes sandblasting for rust removal + anti-rust primer + outdoor topcoat application. In humid environments or near seas with salt spray, enhanced anti-corrosion measures are necessary. Avoiding direct exposure of bare plates effectively prevents rust and aging, significantly extending the lifespan of the plates.