Introduction |
Inconel 625 is a Nickel-Chromium-Molybdenum alloy with excellent corrosion resistance in a wide range of corrosive media, being especially resistant to pitting and crevice corrosion. It is a favourable choice for sea water applications.
Chemical Composition of Inconel 625
The compositional range for Inconel 625 is provided in the table below.
Element |
Content |
Ni |
58% min |
Cr |
20 - 23% |
Mo |
8 - 10% |
Nb+Ta |
3.15 - 4.15% |
Fe |
5% max |
Typical Properties of Inconel 625
Typical properties of Inconel 625 are covered in the following table.
Property |
Metric |
Imperial |
Density |
8.44 g/cm3 |
0.305 lb/in3 |
Melting point |
1350 °C |
2460 °F |
Co-Efficient of Expansion |
12.8 μm/m.°C
(20-100°C) |
7.1x10-6 in/in.°F
(70-212°F) |
Modulus of rigidity |
79 kN/mm2 |
11458 ksi |
Modulus of elasticity |
205.8 kN/mm2 |
29849 ksi |
Properties of Supplied Materials and Heat Treated Materials
Condition of Supply |
Heat Treatment (After Forming) |
Annealed/Spring Temper |
Stress relieve at 260 - 370°C (500 - 700°F) for 30 - 60 minutes and air cool. |
Condition |
Approx Tensile Strength |
Approx Service Temp. |
Annealed |
800 - 1000 N/mm2 |
116 - 145 ksi |
-200 to +340°C |
-330 to +645°F |
Spring Temper |
1300 - 1600 N/mm2 |
189 - 232 ksi |
up to +200°C |
up to +395°F |
Relevant Standards
Inconel 625 is covered by the following standards:
• BS 3076 NA 21
• ASTM B446
• AMS 5666
Equivalent Materials
Inconel 625 is the tradename of Special Metals Group of Companies and equivalent to:
• W.NR 2.4856
• UNS N06625
• AWS 012
Applications of Inconel 625
Inconel 625 typically finds application in:
• Marine
• Aerospace industries
• Chemical processing
• Nuclear reactors
• Pollution control equipment |
Key Specifications/Special Features:
Introduction
Super alloy VLX800H is a slightly modified version of incoloy 800 with the 800H grade possessing higher creep and rupture strength. This modification is possible because of the closely controlled carbon content and modified heat treatment.
Other designations
Equivalent materials to super alloy VLX800H are provided below:
ASTM B163
ASTM B407
ASTM B408
ASTM B409
ASTM B514
ASTM B564
DIN 1.4876
DIN 1.4958