400 Series Cold Rolled Stainless Steel Sheet with 2B Surface Finish and 3mm - 12mm Thickness

Standard: ASTM A240, ASTM A480, ISO, JIS G4305, EN Standard

Grade: 410, 420, 430, 439, 409L Full 400 Series

Density: 7.75 × 10³ Kg/m³

Width: 1000mm, 1219mm, 1500mm, 1800mm, 2000mm

Length: 2000mm, 2438mm, 6000mm, Custom Cut Length

Thickness: 3.0mm - 12mm Custom Tolerance Available

Manufacturing Process: Fully Cold Rolled

Surface Finish: 2B Polished Surface, Uniform Smooth Finish

This high-quality 400 series cold rolled stainless steel sheet and plate is supplied by direct manufacturer, featuring complete thickness specifications from 3.0mm to 12mm with standard industrial 2B smooth surface. Utilizing refined cold rolling integrated production process, the steel plate offers flat and smooth surface, uniform internal structure, stable dimensional tolerance, and excellent flatness.

All raw materials are strictly screened, produced, and inspected in full accordance with ASTM, ISO, and JIS international industrial standards. The product features stable chemical composition, uniform hardness, and is free from surface scratches, oxidation spots, and plate deformation. It serves as the preferred raw material for batch supporting in mechanical manufacturing and general industrial processing industries, offering stable quality and strong batch consistency.

430 Ferritic Stainless Steel: C≤0.12, Si≤1.00, Mn≤1.00, P≤0.040, S≤0.030, Cr: 16.00-18.00, Ni: Residual

410 Martensitic Stainless Steel: C≤0.15, Si≤1.00, Mn≤1.00, Cr: 11.50-13.50 - Good hardness and wear resistance

409L Special Industrial Grade: Low carbon design, excellent high-temperature oxidation resistance, stable mechanical structure - suitable for heavy-duty mechanical supporting parts

The overall density of 400 series cold rolled stainless steel sheet is 7.75g/cm³, featuring low thermal expansion coefficient, stable thermal conductivity, and reliable elastic modulus. The entire plate exhibits uniform physical performance and good structural stability under normal temperature and conventional working environments.

With strong pressure resistance, the material resists bending and deformation during long-term mechanical assembly use, fully matching the physical load requirements of mechanical manufacturing equipment accessories.

400 series stainless steel offers excellent atmospheric oxidation resistance and moderate acid and alkali corrosion resistance. The cold rolled 2B closed protective surface effectively isolates air oxidation, preventing surface rust and discoloration in indoor and conventional outdoor industrial environments.

The material provides good anti-rust effect in dry workshops, mechanical processing workshops, and general atmospheric environments. It features stable performance, no pitting corrosion, and significantly reduces later maintenance costs of mechanical parts.

This batch of 3.0-12mm cold rolled stainless steel plate offers high tensile strength, stable yield strength, and good surface hardness. Compared with ordinary steel plates, it provides stronger wear resistance, pressure resistance, and impact resistance.

The compact and uniform internal structure provides good fatigue resistance, making it suitable for mechanical structural parts, fixed supporting parts, and hardware accessories for long-term use without breaking or deforming under conventional mechanical loads.

400 series cold rolled stainless steel sheet with 2B surface offers excellent comprehensive processing performance. It is suitable for all conventional deep processing technologies including laser cutting, fixed-size shearing, bending stamping, drilling, and edge finishing.

The plate features moderate toughness and hardness, with no edge cracking or surface damage during processing. This results in high finished product yield, facilitating factory rapid batch processing and assembly production while significantly improving production efficiency.

Cold rolling process provides tighter internal grain structure, higher surface smoothness, and more accurate dimensional tolerance compared to hot rolled plates. The finished 2B matte smooth surface is neat and beautiful, requiring no secondary polishing and is ready for direct assembly and use, saving processing time and labor costs.

The entire plate features uniform thickness and excellent flatness, making it ideal for high-precision mechanical matching parts.

Widely used in mechanical equipment manufacturing, industrial hardware accessories, engineering structural parts, equipment shell stamping, workshop auxiliary facilities, electrical cabinet panels, general anti-rust metal parts, and other industrial fields.

The conventional 3.0-12mm thickness range represents the most commonly used supporting specification for mechanical processing, allowing direct cutting into various special-shaped parts to meet diversified production needs of manufacturers.

We are a professional 400 series stainless steel direct sales factory with complete production lines and sufficient spot inventory of 3.0-12mm cold rolled 2B surface sheets available year-round. All products undergo strict quality inspection before delivery and include complete test reports.

We support customized size cutting, customized processing, and fast door-to-door delivery. By adhering to factory direct sales, we eliminate intermediate price differences and provide the most competitive ex-factory prices with standard export packaging. Welcome global mechanical manufacturing buyers to contact us for real quotations and sample testing!