MA625
Ni-21.5Cr-9Mo-2.5Fe-3.7Cb+Ta(mass%)
Nickel chrome alloy featuring outstanding aspects both in corrosion resistance and heat resistance.
Aerospace & Energy Materials Dept.
Main Features
This alloy has particularly excellent corrosion and oxidation resistance. It shows high level of strength, rupture strength and fatigue strength qualities at wide specter of temperatures - from very low up 1100°C.
MA625 is a nonmagnetic alloy. It is a Ni-Cr type alloy with Mo and Cb added to improve strength and corrosion resistance. It especially shows successful results in stress corrosion cracking sensitivity induced by chloride ions. It is mainly used for Jet engine parts, aircraft materials, chemical industry parts, special sea water equipment, heat furnace material, evaporators.
Weldability/Workability
MA625 is not suitable for oxy-acetylene method. However, other welding methods are applicable and it has weldability close to that of 18Cr-8Ni Stainless steel. Welding congelation cracking sensitivity is lower than the 25Cr-20Ni Stainless steel type alloys, and only a little higher than the MA-X alloys.
Available Product Forms
Various shapes, such as flat-rolled plates, forgings, welding wires, wires, welded pipes and tubes, seamless pipes and tubes can be manufactured.
Specifications
Information on specifications to which MA625 alloy can be ordered.
ASTM UNS N06625
| Plates | Bars, Forgings | Pipes and Tubes | Joints |
|---|---|---|---|
| B443 | B446 | B444 | B366 |
| B564 | B704 | ||
| B705 |
ASME UNS N06625
| Plates | Bars, Forgings | Pipes and Tubes | Joints |
|---|---|---|---|
| SB-443 | SB-446 | SB-444 | SB-366 |
| SB-564 | SB-704 | ||
| SB-705 |
JIS NCF625
| Plates | Bars | Pipes and Tubes |
|---|---|---|
| G4902 | G4901 | G4903 |
| G4904 |
AMS UNS N06625
| Plates | Bars | Pipes and Tubes |
|---|---|---|
| 5599 | 5666 | 5581 |
Mechanical Properties
An example of MA625 mechanical properties
| Shape | Tensile strength (kgf/mm2) | 0.2%offse (kgf/mm2) | Elongation (%) | Hardness |
|---|---|---|---|---|
| Round(60φ) | 95(≧84.4) | 45(≧42.2) | 56(≧30) | HB192 |
| Cold Roll(1.2t) | 97(≧84.4) | 50(≧42.2) | 40(≧30) | HRC 23 Hv 251 |
| Hot roll(20t) | 91(≧84.4) | 44(≧42.2) | 46(≧30) | HRC21 |
Corrosion Resistance
Corrosion resistance of MA625
