409 stainless steel: commonly used in automotive exhaust systems, combustion devices, and industrial pipelines due to its excellent high temperature resistance and corrosion resistance.
409L stainless steel: widely used in automotive exhaust treatment devices, building materials, and industrial equipment, especially in situations that require high corrosion resistance and welding performance.
409&409L Stainless Steel Sheets&Plates
| 409 | C % | Si % | Mn % | P% | S% | Cr% | Ni% |
| ASTM | ≤ 0.08 | ≤ 1.0 | ≤ 1.0 | ≤ 0.045 | ≤ 0.03 | 10.5-11.75 | ≤ 0.50 |
| JIS | ≤ 0.08 | ≤ 1.0 | ≤ 1.0 | ≤ 0.045 | ≤ 0.03 | 10.5-11.70 | ≤ 0.50 |
| EN | ≤ 0.08 | ≤ 1.0 | ≤ 1.0 | ≤ 0.045 | ≤ 0.03 | 10.5-12.50 | ≤ 0.50 |
| GB | ≤ 0.08 | ≤ 1.0 | ≤ 1.0 | ≤ 0.045 | ≤ 0.03 | 10.5-11.75 | ≤ 0.50 |
| 409L | C % | Si % | Mn % | P% | S% | Cr% | Ni% | N% |
| ASTM | ≤ 0.03 | ≤ 1.0 | ≤ 1.0 | ≤ 0.040 | ≤ 0.03 | 10.5-11.75 | — | — |
| JIS | ≤ 0.03 | ≤ 1.0 | ≤ 1.0 | ≤ 0.040 | ≤ 0.03 | 10.5-11.70 | — | — |
| EN | ≤ 0.03 | ≤ 1.0 | ≤ 1.0 | ≤ 0.040 | ≤ 0.015 | 10.5-12.50 | — | ≤ 0.030 |
| GB | ≤ 0.03 | ≤ 1.0 | ≤ 1.0 | ≤ 0.040 | ≤ 0.03 | 10.5-11.75 | — | — |
Mechanical Properties of 409&409L Stainless Steel Sheets&Plates
| Mechanical Properties | 409 Stainless Steel | 409 L Stainless Steel |
| T.S.(MPa) | ≥415 | ≥170 |
| Y.S.(MPa) | ≥240 | ≥415 |
| L.(%) | ≥20 | ≥25 |
| HB | ≤88 | ≤170 |
| HRB | ≤89 | ≤88 |
| HBW | ≤180 | ≤183 |
Physical Properties of 409&409L Stainless Steel Sheets&Plates
| Physical Properties | 409 Stainless Steel | 409 L Stainless Steel |
| Density (g/cm³) | 7.85 | 7.8 |
| Melting point (℃) | 1450-1510 | 1450-1510 |
| Thermal conductivity (W/m-K) | 26.1 | 26,3 |
| Elastic Modulus(GPa) | 0.6 | 0.6 |
| Coefficient of thermal expansion (10^-6/K) | 10.2 | 10.2 |
| Specific Heat Capacity, J/(g·K) | 0.46 | 0.46 |