ALLOYS
6MO / Alloy 254
6MO / Alloy 254 is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media. It has a high resistance to pitting and crevice corrosion typically associated with higher alloys such as Alloy 625.
UNS: S31254
Stock Sizes: 1/4” – 1” OD
Specifications:
- Seamless Tube: ASTM A213/A269
- NACE MR0175/MR0103
- NORSOK M-650
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) | 19.5-20.5% |
| Nickel (Ni) | 17.5-18.5% |
| Molybdenum (Mo) | 6.0-6.5% |
| Manganese (Mn) | 1% Max |
| Silicon (Si) | 0.80% Max |
| Copper (Cu) | 0.50-1.00% Max |
| Carbon (C) | 0.020% Max |
| Chemical | Percentage |
|---|---|
| Sulfur (S) | 0.010% Max |
| Phosphorus (P) | 0.030% Max |
| Nitrogen (N) | 0.18-0.22% Max |
| – | – |
| – | – |
| – | – |
| – | – |
| – | – |
Physical Properties
| Property | Measurement |
|---|---|
| Density (lb/in3) | 0.289 |
| Elongation (min %) | 35 |
| Minimum Yield (psi) | 45,000 |
| Minimum Tensile (psi) | 95,000 |
| Max Hardness (HRB) | 96 |