AMS 5604 is a sub-type of 17-4PH, a martensitic precipitation-hardening stainless steel. It has a high concentration of chromium and nickel, along with copper and niobium. Parts made of AMS 5604 possess many favorable characteristics, including excellent corrosion resistance, high strength, and very good mechanical properties.
Moreover, AMS 5604 is easy to machine and manufacture while also possessing excellent weldability. Various heat treatments can be used to achieve different strengths and hardness. Anita Steel & Metals offers in plate, sheet, and strip, which are already solution heat treated. AMS 5604 is precipitation hardenable.
Parts made from AMS 5604 find use in many fields, including the petroleum and chemical industry, food processing equipment, aerospace industry, nuclear waste processing and storage, paper and pulp industry.
AMS 5604 reacts best to hot forming at temperatures ranging from 1742 to 2192 °F (950 to 1200 °C), followed by annealing at 76 °F (25 °C) and aging. However, cold forming should only be used on AMS 5604 plates and sheets in the annealed condition, although to improve corrosion resistance, a re-aging process is required.
AMS 5604 plates, sheets, and strips come in the solution annealed condition. However, eight other states can be achieved using various heat treatment methods: H 900, H 925, H 1025, H 1075, H 1100, H 1150 + 1150, H 1150-M. The number specifies the temperature in °F, except H 1150-M, where the heat treatment starts at 1400 °F. Air cooling is required in all heat treatments.
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