304L stainless steel is an extra-low carbon variation of 304, containing 18–20% chromium and 8–12% nickel. The maximum carbon content is limited to 0.03% to minimize carbide precipitation during welding, thereby preventing intergranular corrosion. 304L is widely used in welded components that cannot undergo post-weld annealing. It is designated as 022Cr19Ni10 (GB/T, China), SUS304L (JIS, Japan), and 1.4307 (EN, Europe).
Chemical Composition
Maximum allowable content (% by mass) per ASTM A240 / EN 10088.
| Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | Type |
|---|---|---|---|---|---|
| 304L / 022Cr19Ni10 | ≤0.03 | 18–20 | 8–12 | — | Austenitic |
Note: 304L has a lower carbon content (≤0.03%) than standard 304, making it highly resistant to intergranular corrosion after welding.
Mechanical Properties
| Grade | Yield (MPa) | Tensile (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|---|---|
| 304L | ≥170 | ≥485 | ≥40 | ≤200 |
Available Sizes & Delivery
| Thickness | 0.3–100 mm |
| Width | 1000–3000 mm |
| Surface Finishes | 2B, BA, No.4, HL, 8K mirror, embossed |
| Forms Available | Plate, coil, sheet, round bar, pipe |
| Standard | GB/T 20878 / ASTM A240 / JIS G4304 / EN 10088 |
| Mill Test Certificate | EN 10204 3.1 with every shipment |
| MOQ | 3 Tons |
| Delivery Time | Within 7 days (≤500 tons) |
Why Order from Zhongtang Steel?
- Excellent Weldability — extra-low carbon prevents sensitization and intergranular corrosion
- EN 10204 3.1 MTC supplied with every shipment
- ISO 9001 certified manufacturer since 1998
- Mill-direct pricing — no trading company markup
- Global shipping — FOB, CFR, CIF available
Applications
- Heavy gauge welded components where post-weld annealing is not possible
- Food processing equipment and brewing tanks
- Chemical and pharmaceutical processing equipment
- Architectural trim and structural components
- Heat exchangers and piping systems
- Marine environments where 304 might be prone to stress corrosion cracking
Values are typical reference ranges per ASTM A240. Actual properties may vary by mill and production route. Mill test certificates (EN 10204 3.1) are supplied with every shipment — contact us for exact data sheets.
