Alloy31 is one kind of azotic contenting iron nichrome molybdenum alloy, the performance is situated between the super austenite stainless steel and the nickel base alloy, The presence of copper increases its resistance to sulfuric acid. The alloy is used in the chemical and petrochemical processing industry . Alloy tubes are cold worked to high strength levels for downhole service in moderately corrosive deep sour gas wells.
Alloy |
% |
Ni |
Cr |
Fe |
Mo |
N |
C |
Mn |
Si |
S |
Cu |
P |
Alloy31 |
Min. |
30.0 |
26.0 |
Bal |
6.0 |
0.15 |
|
|
|
|
1.0 |
|
Max. |
32.0 |
28.0 |
7.0 |
0.2 |
0.015 |
2.0 |
0.3 |
0.01 |
1.4 |
0.02 |
Density
|
8.10 g/cm³
|
Melting point
|
1350-1370 ℃
|
Status
|
Tensile strength
Rm N/mm² |
Yield strength
Rp 0. 2N/mm² |
Elongation
As % |
Brinell hardness
HB
|
Solution treatment
|
650
|
350
|
35
|
≤363
|
ASTM B 668, B709, B 829,ASME SB-668, SB-709, SB-829
Alloy31 is one kind of azotic contenting iron nichrome molybdenum alloy, the performance is situated between the super austenite stainless steel and the nickel base alloy
1.workability
2.High tensile strength,endurance strength,creep strength and rupture strength at 700℃.
3.High inoxidability at1000℃.
4.Steady mechanical performance in the low temperature.
Alloy 31 suit applies in chemistry and the petroleum chemical industry, the environment project and the oil,gas,and so on industrial fields..