ALLOYS
904L
904L tubing is a low carbon high alloy austenitic stainless steel, originally developed to resist corrosion in dilute sulfuric acid. Because of the combination of relatively high contents of chromium, nickel, molybdenum and copper, this grade has greatly improved resistance to strong reducing acids, particularly sulfuric acid. 904L tubing is also extremely resistant to chloride attack from both pitting/crevice corrosion and stress corrosion cracking. Alloy 904L tubing is non-magnetic in all conditions, possesses amazing toughness, and has good formability and weldability.
UNS: N08904
Stock Sizes: 1/8” – 1” OD
Specifications:
- Seamless Tube: ASTM A213/A269/B677/A312
- NACE MR0175/MR0103
Available Processing:
- Cold Worked and Bright Annealed
Common Testing: Eddy Current, Flare, Flattening, Positive Material Identification
Chemical Composition (%)
| Chemical | Percentage |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 19-23% |
| Nickel (Ni) | 23-28% |
| Molybdenum (Mo) | 4-5% |
| Manganese (Mn) | 2% Max |
| Silicon (Si) | 1% Max |
| Copper (Cu) | 1-2% Max |
| Carbon (C) | 0.020% Max |
| Chemical | Percentage |
|---|---|
| Sulfur (S) | 0.030% Max |
| Phosphorus (P) | 0.040% Max |
| Nitrogen (N) | 0.10% Max |
| – | – |
| – | – |
| – | – |
| – | – |
| – | – |
Physical Properties
| Property | Measurement |
|---|---|
| Density (lb/in3) | 0.285 |
| Elongation (min %) | 35 |
| Minimum Yield (psi) | 31,000 |
| Minimum Tensile (psi) | 71,000 |
| Max Hardness (HRB) | 90 |