904L is a high-alloy austenitic stainless steel with low carbon content. 904L has good resistance to general corrosion, particularly in sulfuric and phosphoric conditions. It has been application proved over many years and was originally developed to resist corrosion in dilute sulfuric acid.
904L Specification
| UNS | W.Nr |
| N08904 | 1.4539 |
904L Chemical composition
| Grade | % | Ni | Cr | Mo | Cu | Fe | C | Mn | P | S |
| 904L | Min | 24 | 19 | 4 | 1 | Bal. | ||||
| Max | 26 | 21 | 5 | 2 | 0.02 | 2 | 0.03 | 0.015 |
904L Mechanical properties: (Minimum value at 20℃)
| Tensile Strength
σb/MPa |
Yield Strengthσp0.2/MPa | Elongationσ5 /% |
| 490 | 215 | 35 |
904L Standard
| Bar | Forging | Sheet/Strip | Wire | Pipe | Welding wire |
| ASTM B649 | - | ASTM B625 | ASTM B649 | ASTM B677
ASTM B673 |
AWS A5.9
ER385 |
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