Alloy 625
Introduction :
Nickel Alloy 625 is used both for its high strength and outstanding aqueous corrosion resistance. The strength of Nickel Alloy 625 is primarily a solid solution effect from molybdenum and columbium. Nickel Alloy 625 has excellent weldability.
What are the Features of Alloy 625?
- Outstanding resistance to chloride pitting and crevice corrosion cracking
- Immune to chloride ion stress corrosion cracking
- Resistant to caustics
- Resistant to seawater, in both flowing and stagnant • conditions, and under fouling
Chemical Composition for Alloy 625:-
| Chemistry, % | AMS 4967 | |
|---|---|---|
| Min | Max | |
| Chromium | 20.00 | 23.0 |
| Nickel | 58.00 | Balance |
| Molybdenum | 8.00 | 10.00 |
| Cobalt | – | 1.00 |
| Columbium + Tantalum | 3.15 | 4.15 |
| Aluminum | – | 0.40 |
| Titanium | – | 0.40 |
| Carbon | – | 0.10 |
| Iron | – | 5.00 |
| Manganese | – | 0.50 |
| Silicon | – | 0.50 |
| Phosphorus | – | 0.015 |
| Sulfur | – | 0.015 |
Applications of Alloy 625:-
- Chemical process equipment handling mixed acids both oxidizing and reducing
- Flue gas desulfurization scrubbers
- Evaporators for wet-process phosphoric acid containing H2SO4, HF and ferric salts
- Weld Overlay
Physical Properties for Alloy 625:-
| Density: | 0.305 lb/inch3 |
|---|---|
| Melting Range: | 2350-2460°F |
Mechanical Properties for Alloy 625:-
| Property | Value |
|---|---|
| Ultimate Tensile Strength | 120 ksi |
| 0.2% Yield | 60 ksi |
| Elongation (2”) | 30% |
Alloy 601 Avaliability
- Alloy 625 Welded Pipe 1/2” – 24”
- Alloy 625 Butt-Weld Fittings 1/2” – 8”
- Alloy 625 Flanges 1/2” – 24”
- Alloy 625 Bar 1/8” – 11”
- Alloy 625 Seamless Pipe 1/4” – 8”
- Alloy 625 Plate 1/8” – 3”
- Alloy 625 Seamless Tube 1/8” – 1”
- Alloy 625 Pressure Fittings 1/4” – 2”
Alloy 601 Specifications
- ASTM B443, B705, B366, B446, B564
- ASME SB443, SB705, SB366, SB446, SB564
Alloy 601 Tensile Requirements
- Tensile Strength (KSI) 120
- Yield Strength (KSI) 60
- KSI can be converted to MPA (Megapascals) by multiplying by 6.895.