Alloy Wire International
Datasheet: Inconel® 625
Inconel® 625
A Nickel-Chromium-Molybdenum alloy with excellent corrosion resistance in a wide range of corrosive media, being especially resistant to pitting and crevice corrosion. Inconel® 625 provides resistance to stress corrosion cracking to chloride ions, making it a favourable choice for sea water applications. The alloy also provides commendable oxidation resistance, with its high strength a result of the stiffening combination of Molybdenum and Niobium on the alloy’s Nickel-Chromium base.
Available in all profile options
Key Features
Inconel® 625 offers the following key features:
Excellent corrosion resistance in a wide range of corrosive media
Especially resistant to pitting and crevice corrosion
Good for sea water applications
Typical Applications
Inconel® 625 is known to be suitable for the following applications:
Marine Industries
Aerospace Industries
Chemical Processing
Nuclear Reactors
Pollution Control
Designations
W.NR 2.4856
UNS N06625
AWS 012
Specifications
AMS 5666
ASTM B446
BS 3076 NA 21
ISO 15156-3
(NACE MR 0175)
Chemical Composition
The chemical composition of Inconel® 625 is indicated in the table below:
| 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 |
Alloy Details
Inconel® 625 density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 8.44 g/cm³ | 1350 °C | 12.8 μm/m °C (20 – 100 °C) | 79 kN/mm² | 205.8 kN/mm² |
| 0.305 lb/in³ | 2460 °F | 7.1 x 10-6 in/in °F (70 – 212 °F) | 11458 ksi | 29849 ksi |
Heat treatment of finished parts
The typical heat treatment of Inconel® 625:
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Annealed or Spring Temper | Stress Relieve | 260 – 370°C (500 – 700°F) | 0.5 – 1hr | Air |
Properties
The typical mechanical properties of Inconel® 625:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | < 1050 N/mm² | < 152 ksi |
| Approx. operating temperature | -200 to +340 °C | -330 to +645 °F |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 1300 – 1600 N/mm² | 189 – 232 ksi |
| Approx. operating temperature | up to +200 °C | up to +395 °F |
The above tensile strength ranges are typical. If you require different please ask.
*Trade name of Special Metals Group of Companies
