Anti-Corrosion Alloy
INFORMATION
Description:
Alloy 31 / N08031 / NS144 / 1.4562
Alloy 31 is an iron-nickel-chromium-molybdenum alloy with nitrogen addition. It has a pitting resistance in high chloride environments between those of super-austenitic stainless steels and nickel alloys. The alloy has very good corrosion resistance in mixed acid and high chloride environments. The material is approved in ISO 15156/ NACE MR0175 to test level VI for sour gas service.
Alloy 31 Mechanical Properties:
Alloy 31 Chemical Composition (% by weight):
Alloy 31 / N08031 / NS144 / 1.4562
Alloy 31 is an iron-nickel-chromium-molybdenum alloy with nitrogen addition. It has a pitting resistance in high chloride environments between those of super-austenitic stainless steels and nickel alloys. The alloy has very good corrosion resistance in mixed acid and high chloride environments. The material is approved in ISO 15156/ NACE MR0175 to test level VI for sour gas service.
Alloy 31 Mechanical Properties:
| Temper | Annealed | |
|---|---|---|
| Tensile Rm | 94 | ksi (min) |
| Tensile Rm | 650 | MPa (min) |
| R.p. 0.2% Yield | 41 | ksi (min) |
| R.p. 0.2% Yield | 280 | MPa (min) |
| Elongation (2.02 or 4D gl) | 40 | % (min) |
Alloy 31 Chemical Composition (% by weight):
| Element | Min | Max |
|---|---|---|
| C | - | 0.0015 |
| Si | - | 0.3 |
| Mn | - | 2 |
| P | - | 0.02 |
| S | - | 0.01 |
| Cr | 26 | 28 |
| Cu | 1 | 1.4 |
| Fe | Balance | |
| Mo | 6 | 7 |
| N | 0.15 | 0.25 |
| Ni | 30 | 32 |
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