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Chrome Moly P9

Penn Stainless offers Chrome Moly P9 in welded large diameter pipe.

Please click on each of the below tabs to learn more about Chrome Moly P9 grade stainless.

General Properties

Chrome Moly P9  stainless is designed for high temperature and pressure services.  Chrome Moly P9 is used in the power generation industry and the petro-chemical industry because of its tensile strength, corrosion resistance and high-temperature strength.  Chrome Moly P9 has a better strength to weight ratio than steel, allowing producers to reduce overall weight and create thinner walls. Also, this grade shows strong resistance to rupturing at high pressures and/or temperatures.  Lastly, Chrome Moly P9 is very  resistant to cracking from hydrogen attack and hot sulfide corrosion cracking. P9 is one of the less commonly used grades of Chrome Moly.

Common Applications

  • Petroleum, petro-chemical refinery process




  • Resistant to hot sulfide corrosion cracking
  • Strong resistance to rupturing at high temperatures and high pressures


  • Chrome moly P9 shows good weldability

Heat Treatment

  • Can be used for NACE Applications where sour environments are under high temp and pressure
  • Ideal for creep rupture applications
  • Can handle high temperatures with very low elasticity

Chemical Properties:

Element Composition
Carbon 0.15 max
Manganese 0.30-0.60
Chromium 8.00-10.00
Molybdenum 0.90-1.10

Physical Properties:

Grade Tensile Strength (k.s.i.) Yield Strength (k.s.i.) 0.2% offset Elongation %




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