AMS 5659 (UNS S15500)

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AMS 5659 (UNS S15500) is a martensitic precipitation-hardening stainless steel alloy containing 4% copper. The material is also known as 15-5PH.

All the same advantages of AMS 5643 (UNS S17400) are present, as well as a single low-temperature treatment. AMS 5659 offers superior uniformity of properties with excellent traverse notch toughness and ductility. Compared with AMS 5643, the alloy displays superior forgeability and mechanical properties in large sections. Produced by the consumable electrode, vacuum arc re-melted route enhances the alloy's toughness and ductility.

Benefits:

Typical commercial applications include:

• Good forming characteristics
• Excellent transverse notch toughness
• Excellent weldability
• Heat treatment increases resistance to SCC

Welding & Forming

Our product offers excellent weldability by all commercial welding processes, while forming is also very good. Machinability is good in any of the heat-treated supply conditions utilised.

Applications

AMS 5659 precipitation-hardening stainless steel finds use in applications including aircraft and missile construction, valve parts, fasteners, shafts and gears, nuclear reactor components and aircraft landing gear. The alloy should be considered for applications requiring high transverse toughness and strength.

Material Specifications

1.4545, 15-5PH, AMS 5659, Z7CNU 15.05

Availability

We stock AMS 5659 stainless steel in round bars. We also provide dedicated billeting services where we utilise bar saws to cut your stainless steel round bars to specific lengths accurately.