422 stainless steel

422 stainless steel forgings are critical for high-stress, high-temperature environments, offering a unique combination of martensitic strength, thermal stability, and corrosion resistance. Their compliance with aerospace and industrial standards ensures reliability in turbines, power plants, and oil/gas equipment.

Descriptions

1. Chemical Composition

The composition of 422 stainless steel includes chromium, molybdenum, and tungsten to enhance high-temperature strength and oxidation resistance:

2. Mechanical Properties

422 stainless steel forgings achieve optimal performance after heat treatment (quenching and tempering). Properties vary between annealed and heat-treated conditions:

Annealed Condition

Heat-Treated Condition (Quenched & Tempered)

3. Common Forging Product

Forged Turbine Blades

Forged Compressor Disks

Forged Valve Bodies

Forged Shafts

Forged Fasteners

4. Key Advantages

High-Temperature Stability: Retains strength and resists creep at temperatures up to 650°C.

Oxidation Resistance: Forms a protective chromium oxide layer.

Machinability: Can be machined in the annealed condition and hardened post-processing.

5. Industry standards

Standard	Scope
ASTM A565/A565M	Martensitic stainless steel bars for high-temperature service.
AMS 5619	Aerospace-grade 422 stainless steel bars and forgings.
ASTM A473	Stainless steel forgings (general applications).
ASME SA565	ASME Boiler and Pressure Vessel Code compliance.
EN 10088-3	Technical delivery conditions for semi-finished products.