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    +44(0)1767 604555
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    +44(0)7710 107987
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We are specialists in engineering materials support to improve the aerospace MRO supply chain.

Smiths MRO is a sub-divsion of a larger business - Smiths Advanced Metals.

Smiths MRO focuses on raw material support for the global aircraft maintenance, repair and overhaul market. Our business is supported by a broad and diverse stock range with a dedicated team that provides outstanding service levels required for our industry.

We offer AOG support (Aircraft on the Ground).

15-5PH Bar (AMS 5659)

Precipitation Hardening Stainless Steel

15-5PH bars from Smiths MRO.

15-5PH stainless steel bar is a popular grade in aerospace applications and is known for its toughness and uniformity.

We stock VAR (Vacuum Arc Remelt) and ESR (Electro Slag Remelt) versions of 15-5PH, covered by the AMS 5659 specification.

15-5PH offers good machinability making the alloy ideal for producing intricate parts, especially where distortion from conventional heat treatment is an issue. Material weldability is excellent using traditional welding methods. Our product also benefits from increased toughness and ductility.

Heat Treatment Conditions

We stock a wide range of sizes and shapes, including round, and flat bars, in various conditions. The specification AMS 5659 covers 15-5PH steel in the following conditions:

  • Condition A / Solution Annealed
  • H900
  • H925
  • H1025
  • H1075
  • H1100
  • H1150

We arrange heat treatment to any of these tempers from our stock for you, or also to a range of required tensile or hardness results. We also process your bars in-house, supplying your product to accurately cut lengths.


15-5PH offers high strength with good corrosion resistance and therefore finds suitability in applications where such characteristics are critical. The material meets the demanding mechanical properties required for engineering applications in the aerospace sector.

Engineering applications in the aerospace MRO market sector include landing gear, instrumentation, shafts, gears and fasteners.

Corrosion Resistance

The corrosion resistance of 15-5PH is superior to straight chromium grades such as 410 & 431 stainless steel and almost comparable with chromium-nickel alloy grades. Whiles stress corrosion cracking improves after heat treatment, the corrosion resistance of the alloy may be adversely affected by surface treatment or aged heat treatment.

Product Features:

    15-8PH bars according to the AMS 5659 specification
    We predominantly supply to Condition A
    See content above for other tempers

    Landing gear

    Good corrosion resistance
    Good machinability
    Excellent weldability
    Increased toughness and ductility

Do you require
15-5PH Stainless Bar?

Smiths MRO

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