Incoloy 925 bar
Incoloy 925 (UNS N09925) is an age-hardenable nickel based alloy with additions of molybdenum, copper, titanium and aluminum. Alloy 925 offers corrosion resistance comparable with that of alloy 825, but with higher strength obtained by age hardening. The combination of nickel and chromium renders protection in both oxidizing and reducing atmospheres. The high nickel content also gives resistance to chloride ion stress-corrosion cracking. Pitting and crevice corrosion resistance is also excellent.
Specifications
| Grade | UNS | JIS |
| Incoloy 925 | N09925 | NCF 925 |
Chemical composition
| % | Ni | Cr | Fe | C | Mn | Si | Cu | S | Al | Ti | P | Mo | Nb |
| min | 42 | 19.5 | Bal | 1.5 | 0.10 | 1.9 | 2.5 | ||||||
| Max | 46 | 23.5 | 0.03 | 1 | 0.5 | 3 | 0.03 | 0.50 | 2.4 | 0.03 | 3.5 | 0.50 |
Physical Properties
| Desity | Melting Range | Tensile Strength
σb/MPa |
Yield Strength σp0.2/MPa |
Elongation σ5 /% |
| 8.08 g/cm3 | 1311-1366℃ | 650 | 300 | 30 |
Features:
Incoloy 925 is a precipitation-hardenable nickel-iron-chromium alloy. It combines high strength with Incoloy 825’s excellent corrosion resistance. Incoloy 925 is particularly resistant to sulfide-induced stress cracking and stress-corrosion cracking.
Applications:
Down-hole and surface well components for sour (containing hydrogen sulfide) crude oil and natural gas production.
