AISI 304L / UNS S30403 (Austenitic) Stainless Steel
Chemistry, mechanical properties, physical properties, and practical selection notes for rolled AISI 304L products.
Performance & Use Notes
- Low-carbon 304 for improved weldability and reduced sensitization risk (preferred for welded assemblies).
Standards & Designations
ASTM A240 ♦ UNS s30403
Data Tables
- Low-carbon 304 for improved weldability and reduced sensitization risk.
| Chemical composition (wt%) | Limits |
|---|---|
| C | 0.030 max |
| Cr | 18.0–20.0 |
| Ni | 8.0–12.0 |
| Mn | 2.00 max |
| Si | 1.00 max |
| P | 0.045 max |
| S | 0.030 max |
| N | 0.10 max |
| Mechanical (annealed) | Requirements (min / max) |
|---|---|
| YS | 25 ksi min |
| UTS | 70 ksi min |
| Elongation | 40% min |
| Hardness | B92 max |
Values shown are typical/spec limits at room temperature unless noted; requirements vary by product form, size, and specification.
304L stainless steel from Source21 is a widely used austenitic stainless steel grade valued for its excellent corrosion resistance clean appearance and superior weldability. Featuring low carbon content Type 304L minimizes the risk of intergranular corrosion making it an ideal choice for welded and fabricated components exposed to demanding environments. It offers excellent formability and deep drawing capability while meeting strict hygiene requirements for food processing medical and sanitary applications. Common uses include tanks sinks kitchen and medical equipment marine fittings architectural panels and electrical enclosures where durability and long term performance are critical.
Source21 supplies 304L stainless steel in coil, strip, sheet, foil, bar, and plate with finish options including 2B, BA, number 4, and mirror, all produced to meet ASTM A240, ASTM A666, and AMS 5511 standards.
Contact the Source21 team to place an order explore available forms and finishes or receive expert guidance supported by reliable supply and responsive service.