ASTM A240 304 2B Stainless Steel Coil
Surface Treatment: Polished
Technique: Cold Rolled
Surface: 2b, Ba
Thickness: 0.02-3.0mm
Thickness Tolerance: +/-5%
Transport Package: Standard Export Packing
China 304 2B Stainless Steel Coil Supplier
304 Cold-Rolled Stainless Steel Coil Specifications
| Grade | 304 (UNS S30400, 1.4301) |
| Thickness | 0.3mm–6.0mm (common: 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm) |
| Width | 1000mm, 1219mm (48"), 1250mm, 1500mm, 2000mm (customizable) |
| Length | Coil (continuous) – typically 2000–6000mm per loop; slit to length upon request |
| Surface Finish | 2B (mill finish), BA (bright annealed), No.4 (matte), 8K (mirror), embossed, etc. |
| Standard | ASTM A240, EN 10088-2, JIS G4305, GB/T 1220 |
| Coil Weight | 1–25 metric tons (depending on thickness and width) |
Chemical Composition (ASTM A240)
| Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | Chromium (Cr) | Nickel (Ni) | Nitrogen (N) |
| Value (%) | ≤ 0.08 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 18.0 – 20.0 | 8.0 – 10.5 | ≤ 0.10 |
Mechanical Properties (Annealed Condition)
| Property | Metric Value | Imperial Value |
| Tensile Strength (min) | ≥ 515 MPa | ≥ 75 ksi |
| Yield Strength (0.2% Offset, min) | ≥ 205 MPa | ≥ 30 ksi |
| Elongation (% in 50mm, min) | 40% | 40% |
| Hardness (Rockwell B, max) | 92 HRB | 92 HRB |
| Hardness (Brinell, max) | 201 HBW | 201 HBW |
What is the difference between 304 and 304L?
The primary difference lies in the carbon content. 304 has a maximum carbon content of 0.08%, whereas 304L has a maximum of 0.03% (the "L" stands for "Low Carbon").
When welding thick plates, 304L prevents "carbide precipitation" during the welding process, ensuring that the weld zone retains its corrosion resistance without the need for post-weld annealing.
How do you calculate the weight of a 304 stainless steel coil?
The standard formula for calculating weight is:
Weight (kg) = Thickness (mm) × Width (m) × Length (m) × Density (7.93)
Example: For a sheet with a thickness of 1.0 mm, a width of 1219 mm, and a length of 2438 mm, the weight is: 1.0 × 1.219 × 2.438 × 7.93 ≈ 23.57 kg.
GNEE 304 Stainless Steel Coil Types
- 304 Stainless Steel BA Finish Coil
- 304 Stainless Steel 2B Finish Coil
- 304 Stainless Steel Mirror Finish Coil
- 304 Stainless Steel Polished Coil
- 304 Stainless Steel HR Finish Coil
- 304 Stainless Steel CR Finish Coil
If you have requirements for 304 stainless steel coils, we welcome your orders. Please contact our factory immediately; we offer competitive prices and excellent service.
Quality Control
GNEE implements a comprehensive quality control system for every batch of 304 stainless steel coils to ensure compliance with ASTM A240 and ASTM A480 standards. Prior to shipment, each coil undergoes chemical composition analysis, PMI (Positive Material Identification), measurements of thickness and width, surface inspection, flatness verification, hardness testing, and mechanical property testing.
Professional Stainless Steel 304 Coil Packaging
For export packaging, each coil is wrapped in moisture-proof kraft paper and anti-rust PVC film, and secured with steel edge protectors and reinforced steel strapping. The coils are mounted on fumigation-free wooden pallets or export-grade wooden bases to prevent shifting or deformation during transit. This packaging system effectively protects the material against moisture, corrosion, impact damage, and surface scratches, ensuring the coils remain in pristine condition throughout long-distance ocean and inland transportation.
Customer Feedback
Client: A European manufacturer of high-end kitchenware.
Application: Laser cutting for the production of commercial dishwasher casings and inner liners.
Procurement Specification: ASTM A240 304 2B, 1.5mm x 1219mm x Coil.
After the shipment arrived at the client's facility in Germany, the Purchasing Director sent an email with photos:
"We just opened the containers for the 304 2B coils. Honestly, this is the most professional packaging we've seen in years. Not a single scratch on the edges, and the 2B finish is as bright as it just left the mill. No moisture, no rust. This saves us at least 2 days in material inspection and preparation."
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