Inconel 625, also known as Alloy 625, with the UNS designation N06625 and W.Nr. 2.4856, is a high-strength, corrosion-resistant nickel-chromium-molybdenum-niobium alloy known for its exceptional performance in high-temperature and aggressive environments. It contains a significant amount of nickel, along with chromium and molybdenum, which contribute to its excellent resistance to oxidation and corrosion under a wide range of conditions. Inconel 625 is widely used in various industries, including aerospace, chemical processing, and marine engineering, due to its outstanding weldability, high tensile strength, and resistance to chloride-induced stress corrosion cracking. This versatile alloy is commonly employed in applications such as marine exhaust systems, chemical processing equipment, aerospace components, and oil and gas production.
Service temperatures of Inconel alloy 625 range from cryogenic to 1800°F (982°C).
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sales@cocessalloys.comChemical Composition
|
Nickel (Ni) |
58% min |
|
Chromium (Cr) |
20-23% |
|
Iron (Fe) |
5.0% max |
|
Molybdenum (Mo) |
8-10% |
|
Niobium+Tantalum (Nb+Ta) |
3.15-4.15% |
|
Carbon (C) |
0.1% max |
|
Manganese (Mn) |
0.5% max |
|
Silicon (Si) |
0.5% max |
|
Phosphorus (P) |
0.015 max |
|
Sulfur (S) |
0.015 max |
|
Aluminum (Al) |
0.4% max |
|
Titanium (Ti) |
0.4% max |
|
Cobalt (Co) |
1.0% max |
Physical Properties
|
Density |
lb/cu in |
0.305 |
|
gram/cc |
8.44 |
|
|
Melting Range |
°F |
2350-2460 |
|
°C |
1290-1350 |
|
|
Specific Heata |
Btu/lb°F (J/kg°C) |
|
|
0°F (-18°C) |
0.096 (402) |
|
|
70°F (21°) |
0.098 (410) |
|
|
200°F (93°C) |
0.102 (427) |
|
|
400°F (204°C) |
0.109 (456) |
|
|
600°F (316°C) |
0.115 (481) |
|
|
800°F (427°C) |
0.122 (511) |
|
|
1000°F (538°C) |
0.128 (536) |
|
|
1200°F (649°C) |
0.135 (565) |
|
|
1400°F (760°C) |
0.141 (590) |
|
|
1600°F (871°C) |
0.148 (620) |
|
|
1800°F (982°C) |
0.154 (645) |
|
|
2000°F (1093°C) |
0.160 (670) |
|
|
Permeability at 200 Oersted (15.9 kA/m) |
1.0006 |
|
|
Curie Temperature |
°F |
<-320 |
|
<-320 |
-196 |
Mechanical Properties
|
Temperature |
Yield strength |
Tensile strength |
Elongation |
|||
|
Rp 0.2 |
Rm |
A |
||||
|
°C |
°F |
MPa |
ksi |
MPa |
ksi |
% |
|
20 |
68 |
330 |
47.9 |
730 |
105.9 |
35 |
Inconel 625 is utilized in a wide range of applications due to its exceptional properties. Some typical applications of Inconel 625 include:
1. Aerospace industry: Aircraft ducting systems, engine exhaust systems, thrust-reverser systems, and rocket engine components.
2. Chemical processing industry: Equipment for handling and processing corrosive chemicals, such as chemical plant reactors, vessels, and piping systems.
3. Marine engineering: Propeller blades, shafts, and other components in seawater applications.
4. Oil and gas industry: Wellhead components, subsurface safety valves, and equipment for sour gas service.
5. Power generation industry: Steam turbine shroud rings, seals, and other components in high-temperature, high-pressure environments.
Specifications for Inconel 625 include the following:
|
Rod & Bar |
Forgings |
Plate, Sheet and Strip |
Seamless Pipe & Tube |
Welded Pipe & Tube |
Fittings |
|
ASTM B 446/ASME SB 446 |
ASTM B 564/ASME SB 564 |
ASTM B 443/ASTM SB 443 |
ASTM B 444/ASME SB 444 |
ASTM B 704/ASME SB 704, ASTM B 705/ASME SB 705 |
ASTM B 366/ASME SB 366 |
Standard product forms of Inconel 625 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at sales@cocessalloys.com for full information.
