Stainless Steel Alloy - Martensitic Precipitation Hardening (Maraging) Stainless Steel

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

13%

 

Hardness

20 HRc

20 HRc

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

20 %

 

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)

11.2 µm/m-°C

6.22 µin/in-°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

This information has been sourced, reviewed and adapted from materials provided by NeoNickel.

For more information on this source, please visit NeoNickel.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    NeoNickel. (2019, May 01). Stainless Steel Alloy - Martensitic Precipitation Hardening (Maraging) Stainless Steel. AZoM. Retrieved on October 17, 2019 from https://www.azom.com/article.aspx?ArticleID=4372.

  • MLA

    NeoNickel. "Stainless Steel Alloy - Martensitic Precipitation Hardening (Maraging) Stainless Steel". AZoM. 17 October 2019. <https://www.azom.com/article.aspx?ArticleID=4372>.

  • Chicago

    NeoNickel. "Stainless Steel Alloy - Martensitic Precipitation Hardening (Maraging) Stainless Steel". AZoM. https://www.azom.com/article.aspx?ArticleID=4372. (accessed October 17, 2019).

  • Harvard

    NeoNickel. 2019. Stainless Steel Alloy - Martensitic Precipitation Hardening (Maraging) Stainless Steel. AZoM, viewed 17 October 2019, https://www.azom.com/article.aspx?ArticleID=4372.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit