AMS 5629 - Ph 13/8MO Stainless Steel

Typical Applications

Fasteners

Valves

Fittings

Petrochemical Components

Aircraft Structural parts

PH 13/8 MO is a precipitation hardening stainless steel alloy that conforms to the AMS 5629, AMS 5864, AMS 5862 specifications.

This material is characterised by excellent strength, corrosion resistance, and toughness at both room and elevated temperatures.

PH 13/8 MO (uns s13800) is often used in aerospace, chemical processing, and power generation applications where high strength and corrosion resistance are essential. The material is not particularly easy to work with due to its high strength and toughness, which can make cutting and machining difficult. However, with the proper equipment and techniques, it is possible to fabricate and form PH 13/8 MO into complex shapes and components.

It is a medium to high strength material achieved through appropriate ageing treatments (see table below) and contains very good resistance to stress corrosion. PH 13/8MO stainless steel is produced by Vacuum Induction Melting (VIM) followed by Vacuum Arc Remelting (VAR).

Related Products

Technical specification

Related Specifications

AMS 5629
AMS 5862
UNS S13800
W.Nr 1.4534

Specific Gravity

7.76 g/cm3

Chemical Composition (WT %)

 
Min  
Max  
C  
-  
0.05  
Si  
-  
0.10  
Mn  
-  
0.10  
P  
-  
0.01  
S  
-  
0.008  
Cr  
12.24  
13.25  
Mo  
2.00  
2.50  
Ni  
7.50  
8.50  
AI  
0.90  
1.35  
N  
-  
0.010  
Fe  
Bal  
-  

Typical Mechanical Properties in the Annealed Condition

 
-  
-  
H950
H1000
H1025
H1050
H1100
H1150
0.2% Proof Stress  
MPA  
Min  
1413
1310
1207
1138
931
621
Tensile Strength  
MPA  
Min  
1517
1413
1276
1207
1034
931
Elongation  
%  
Min  
10
10
11
12
14
14
Reduction of area  
%  
Min  
45
60
50
50
50
50
Reduction of area  
%  
Min  
35
40
45
45
50
50
Hardness  
HRC  
Min  
45
43
41
40
34
30

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