The 13-8PH alloy is a martensitic, precipitation hardening (maraging) stainless steel.
13-8PH Maraging Stainless Steel Alloy Industry Standard
The 13-8PH alloy complies with the AMS 6514 industry standard and is also known as UNS K44220.
Applications of 13-8PH Maraging Stainless Steel Alloy
The 13-8PH alloy is use for a wide range of applications including:
- Aircraft landing gear
- Aircraft Structural sections
- Aircraft valves and shafts
- Components in the petrochemical and nuclear industries
Heat Treatment of 13-8PH Maraging Stainless Steel Alloy
Condition A
Soak at 927°C (1700°F) and cool below 16°C (60°F) so that material is completely transformed to martensite. Normally, one hour hold at temperature is suggested.
H950, H1000, H1050, H1100, and H1150
Soak solution treated material for 4 hours at specified temperature, air cool.
Chemical Composition of 13-8PH Maraging Stainless Steel Alloy
The Super Alloys 13-8PH alloy has the following chemical composition that gives it its unique properties.
Table 1. Chemical composition of 13-8PH maraging stainless steel alloy
|
Chemical Elements
|
Min
|
Max
|
|
Nickel
|
7.5
|
8.5
|
|
Molybdenum
|
2.0
|
2.5
|
|
Carbon
|
-
|
0.05
|
|
Phosphorus
|
-
|
0.01
|
|
Sulfur
|
-
|
0.008
|
|
Silicon
|
-
|
0.1
|
|
Manganese
|
-
|
0.1
|
|
Iron
|
76.0
|
-
|
|
Chromium
|
12.25
|
13.25
|
|
Nitrogen
|
-
|
0.01
|
Mechanical Properties of 13-8PH Maraging Stainless Steel Alloy
The mechanical properties of the 13-8PH alloy following different heat treatments are outlined in the following tables.
Table 2. Mechanical properties under condition A
|
|
Metric
|
Imperical
|
|
Tensile Strength, Ultimate
|
1480 MPa
|
215 ksi
|
|
Tensile Strength, Yield
|
1415 MPa
|
205 ksi
|
|
Percent Elongation
|
|
|
|
Hardness
|
|
|
Table 3. Mechanical properties under condition H1150
|
|
Metric
|
Imperical
|
|
Tensile Strength, Ultimate
|
1000 MPa
|
145 ksi
|
|
Tensile Strength, Yield
|
725 MPa
|
105 ksi
|
|
Percent Elongation
|
|
|
|
Hardness
|
46 HRc
|
46 HRc
|
Physical Properties of 13-8PH Maraging Stainless Steel Alloy
The physical properties of the13-8PH alloy are outlined in the following table.
Table 4. Physical properties of 13-8PH maraging stainless steel alloy
|
|
Metric
|
Imperical
|
|
Thermal Expansion 21°C (70°F)
|
10.6 µm/m-°C
|
5.89 µin/in-°F
|
|
Thermal Expansion 250°C (482°F)
|
|
|
|
Thermal Expansion 500°C (932°F)
|
11.9µm/m-°C
|
6.61 µin/in-°F
|
|
Conductivity
|
14 W/m-°K
|
97.2 BTU-in/hr-ft2-°F
|
|
Melting Point
|
1405 - 1440°C
|
2560 -2620°F
|
Available Product Forms of 13-8PH Maraging Stainless Steel Alloy
13-8PH alloy is available in the forms of plate, bar, sheet, tube, billet, and forging
.jpg)
This information has been sourced, reviewed and adapted from materials provided by NeoNickel.
For more information on this source, please visit NeoNickel.