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13-8 MO Stainless Steel

At Altemp Alloys, we offer a variety of stainless steel alloys, ideal for high temperature and extreme applications. 13-8 stainless steel is a martensitic, precipitation hardening stainless steel, meaning 13-8 MO has a high toughness and excellent resistance to stress corrosion cracking. These properties stem from a tight chemical composition control, plus a specialized melting for reducing impurities and minimizing segregation. Compared to other ferrous-based alloys, 13-8 MO offers high mechanical properties under severe, extreme conditions. Like many of our alloys, 13-8 MO is suitable for applications where high strength, toughness, corrosion resistance and stress resistance are required.

Common applications of 13-8 MO

13-8 MO has good fabrication characteristics, making it ideal for the following common applications:

  • Aircraft engine, landing gear and structural sections
  • Missile components
  • Injection moldig equipment
  • Fittings
  • Bolts
  • Pins
  • Screws
  • Fasteners
  • Valves
  • Shafts
  • Nuclear and petrochemical industry equipment

13-8 MO Stainless Steel Shapes

Altemp Alloys offers 13-8 MO Stainless Steel (PH13-8 MO UNS S13800) in:

13-8 MO Stainless Steel Shapes Specifications /
Additional Info
Plate AMS 5864
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Bar/Forgings AMS 5629
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Wire Vac Melted AMS 5840 Request a Quote


Carbon: 0.05
Silicon: 0.10
Chromium: 12.25-13.25
Nickel: 7.50-8.50
Nitrogen: .01
Sulfur: 0.008
Phosphorus: 0.01
Aluminum: 0.90-1.35
Molybdenum: 2.00-2.50

Altemp Alloys is also your source for a wide range of stainless steel alloys, including A-286, AM 350, 15-5 PH, 15-7 MO, 17-4 PH Stainless, 17-7 PH Stainless, 321 Stainless, 347 Stainless and 410 Stainless.

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