422 (UNS S42200) Stainless Steel

422 (UNS S42200) Stainless Steel

422 (UNS S42200) Stainless Steel General Properties With better strength at higher temperatures, Type 422 (S42200) is an appealing alternative to Type 403. Type 422 is a hardenable martensitic stainless steel which is being widely used for high temperatures up to 1200°F. It is capable of being...
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Product Details

422 (UNS S42200) Stainless Steel

Applications:

  • Aircraft parts

  • Steam and gas turbine components

  • High heat components

  • Rotors


Corrosion Resistance:

  • Adaptable to applications where maximum resistance to corrosion is not required.

  • Resistant to the corrosive action of the atmosphere, fresh water, steam, and a variety of the milder acids and alkalies.


Oxidation Resistance:

  • Good resistance to destructive scaling or oxidation

  • Continuous service at temperatures up to 1250F.

  • Temperature will vary with the type of atmosphere, type of construction, and cycle of operation.


Machineability

  • Comparable to 18-8 but easier to machine

  • Help avoid galling with sharply ground tools

  • Maintain consistent speed and feed

  • Turning tools: 8-14° side rake

  • Drilling: 140° point

  • Threading: grind tools with 10-15° back rake

  • Cobalt high-speed tools: turn at 90-120 sfpm, drill at 40-75 sfpm, mill at 70-120 sfpm, ream at 20-60 sfpm, roughing and finishing at 200-400 sfpm


Workability

  • Initial forging and rolling at 2100° to 2150°F (1149° to 1177°C)

  • 1700°F (927°C) minimum to hot work


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