Inconel 625 Ni-Cr-Mo Alloy Welding Wire
Inconel 625 Ni-Cr-Mo Alloy Welding Wire Introduction
Inconel 625 is a nonmagnetic, corrosion – and oxidation-resistant, nickel-based alloy. Its outstanding strength and toughness in the temperature range cryogenic to 2000°F (1093°C) are derived primarily from the solid solution effects of the refractory metals, columbium, and molybdenum, in a nickel-chromium matrix. The alloy has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. Some typical applications for alloy 625 have included heat shields, furnace hardware, gas turbine engine ducting, combustion liners and spray bars, chemical plant hardware, and special seawater applications.
Inconel 625 is a Ni-Cr-Mo alloy that is used for its high strength, high toughness, and its oxidation and corrosion resistance. The strength of alloy 625 is derived from the stiffening effect of molybdenum and niobium on its nickel-chromium matrix. Although the alloy was developed for high-temperature strength, its highly alloyed composition provides a high level of general corrosion resistance. Applications include and are not limited to aircraft ducting systems, aerospace, jet engine exhaust systems, engine thrust-reverser systems, specialized seawater equipment, chemical process equipment.
Standard Wire Finishes
Extra Clean: (XC) Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”
Grease (round wire only): Drawn in a heavy grease produces an “Ultrabright” finish for decorative applications
Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation. A soap finish is available in tempered products.
Plated: Many plating options are available.
Inconel 625 Ni-Cr-Mo Alloy Welding Wire Specification
| Standard | Inconel 625 |
| UNS | N06625 |
| WERKSTOFF NR. | 2.4856 |
| AFNOR | NC22DNB4M |
| JIS | NCF 625 |
| GOST | XH75MТ |
| BS | NA 21 |
| EN | NiCr22Mo9Nb |
Inconel 625 Ni-Cr-Mo Alloy Welding Wire Typical Chemical Composition
| Element | Min % | Max % |
| C | – | 0.10 |
| Mn | – | 0.50 |
| Si | – | 0.50 |
| P | – | 0.015 |
| S | – | 0.015 |
| Cr | 20.00 | 23.00 |
| Co | – | 1.00 |
| Mo | 8.00 | 10.00 |
| Fe | – | 5.00 |
| Al | – | 0.40 |
| Ti | – | 0.40 |
| Ni | 58.00 | – |
| Nb/Cb | 3.15 | 4.15 |
| Ta | – | 0.05 |
| Cu | – | 0.5 |
Inconel 625 Ni-Cr-Mo Alloy Welding Wire Typical Properties
Mechanical Properties
| Condition | Approx. tensile strength | Approx. operating temperature | |
| N/mm² | ksi | °C | |
| Annealed | 800 – 1000 | 116 – 145 | -200 to +340 |
| Spring Temper | 1300 – 1600 | 189 – 232 | up to +200 |
Physical Properties
| Density | 8.44g/cm³ | 0.305 lb/in³ |
| Melting Point | 1350°C | 2460°F |
| Coefficient of Expansion | 12.8 μm/m °C (20 – 100°C) | 7.1 x 10-6 in/in °F (70 – 212°F) |
| Modulus of Rigidity | 79 kN/mm² | 11458 ksi |
| Modulus of Elasticity | 205.8 kN/mm² | 29849 ksi |
Please note that the above specifications are “general specifications” that pertain to the majority of our production. These specifications should only be used for general, informational purposes. All dimensions and specifications are nominal and are subject to normal manufacturing tolerances. All specifications are subject to change without prior notice. All pictures shown are for illustration purposes only. Actual product may vary.
INCONEL® is a registered trademark of the Special Metals Corporation group of companies.
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