410L vs 409
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
410L
Stainless Steel
410L is a low-carbon 12% chromium ferritic stainless: reducing carbon below 0.03% keeps it soft, weldable and free of the hardening seen in 410. It is a workhorse for containers, transport and structural applications in mildly corrosive environments.
Standards: DIN 1.4003 · AISI 410L · JIS SUS410L · GB 022Cr12
409
Stainless Steel
409 is a titanium-stabilised 11% chromium ferritic stainless developed for automotive exhaust systems. It offers enough oxidation and corrosion resistance for exhaust service at the lowest cost of any stainless family member.
Standards: DIN 1.4512 · AISI 409 · JIS SUS409L (close) · GB 06Cr11Ti
Chemical composition compared (%)
| Element | 410L | 409 |
|---|---|---|
| C | ≤0.03 | ≤0.08 |
| Si | ≤1.00 | ≤1.00 |
| Mn | ≤1.00 | ≤1.00 |
| P | ≤0.040 | ≤0.045 |
| S | ≤0.030 | ≤0.045 |
| Cr | 11.00–13.00 | 10.50–11.75 |
| Ni | ≤0.60 | ≤0.50 |
| Ti | — | 6×C–0.75 |
Properties compared
| Property | 410L | 409 |
|---|---|---|
| Delivery condition | Annealed | Annealed |
| Hardness | ≤183 HB (annealed) | ≤183 HB (annealed) |
| Tensile strength | 360–540 MPa | 380–550 MPa |
| Density | 7.70 g/cm³ | 7.70 g/cm³ |
| Magnetic | Yes | Yes |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 410L · 409. Substitution decisions for certified parts stay with the design authority.