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 5864
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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