Incoloy 925
Introduction
Overview of Incoloy 925 Alloy
Incoloy alloy 925 (UNS N09925) is an agehardenable nickel-iron-chromium alloy with additions of molybdenum, copper, titanium and aluminum. The titanium and aluminium are specifically added to give a strengthening of the alloy during ageing, as Ni3(Al, Ti) gamma (‘ϒ’) prime precipitates form throughout the alloy matrix and greatly increases the hardness and strength in a similar way to alloy 718 and 725.
The alloy is designed to provide a combination of high strength and
excellent corrosion resistance. The nickel content is sufficient for protection against chloride-ion stresscorrosion cracking.
Incoloy 925 Alloy Applications
Incoloy alloy 925 is used in various applications requiring a combination of high strength and corrosion resistance. Because of the alloy’s resistance to sulfide stress cracking and stress-corrosion cracking in “sour” (H2S containing) crude oil and natural gas, it is used for down-hole and surface gaswell components including tubular products, valves, hangers, landing nipples, tool joints and packers.
The alloy is also useful for fasteners, marine and pump shafting and high-strength piping systems.
Incoloy 925 Alloy Tags
- UNS Number: N09925
- Werkstoff Number: /
- Standards: ASTM B409/ASTM A240
Incoloy 925 Alloy Quality Products
Technical Data
| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN | OR |
| Alloy 925 | / | N09925 | – | – | – | – | – | – |
| Cr | Ni | Mo | Co | Nb (+Ta) | Ti | W | Cu | C | Mn | N | Si | P | S | Fe | Al | |
| Min | 19.5 | 42 | 2.5 | 0.08 | 1.9 | 1.5 | 0.1 | |||||||||
| Max | 22.5 | 46 | 3.5 | 0.5 | 2.4 | 3 | 0.025 | 1 | 0.35 | 0.02 | 0.003 | Bal | 0.5 |
| 0.2% Proof Stress | 758-965 N/mm2 | 110-140 ksi |
| Tensile Strength | 965 N/mm2 | 140 ksi |
| Elongation, 5.65√S0 and 4D | 18% | |
| Reduction of Area | 25% | |
| Hardness | 38 HRC max. | |
| Impact Strength(-60oC) Longitudinal | 47J av (43J min) | 35 ft.lb av (32 ft.lb min) |
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