Key Specifications/Special Features:
Introduction:
Alloy 31 is an iron-nickel-chromium-molybdenum alloy with nitrogen addition
It has a pitting resistance in high chloride environments between those of super-austenitic stainless steels and nickel alloys
Alloy has very good corrosion resistance in mixed acid and high chloride environments
Material is approved in ISO 15156/NACE MR0175 to test level VI for sour gas service
Typical applications:
Control lines
Control and instrumentation tubes
Heat exchangers
Chemical processing
Oil and gas
Typical wire chemistry:
C: 0.0015
Mo: 6-7
N: 0.2
Cr: 26-28
Ni: 30-32
Mn: 2
Si: 0.3
P: 0.02
Cu: 1.2
S: 0.01
Fe: Bal
| 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
• Pollution control equipment |
Company information:
Phone:+8613400008153
Tel: 0510-88222973
Fax: 0510-88222975
Web: taixie.en.made-in-china.com
Add:No.22, Xinfeng Road, Xinwu District, Wuxi, Jiangsu, China.
Over 16 years of specialist experience in Copper, Mould steel, steel alloy! Welcome to order and customized.
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