HC  A297/A297M


Type28 Chromium

Chemical RequirementsComposition, %):

Carbon:0.5 max

Manganese, max:1.00

Silicon, max:2.00

Phosphorus, max:0.04

Sulfur, max:0.04

Chromium Nickel:26.0–30.0

Nickel:4.00 max

Molybdenum, max:0.50

Tensile Requirements

Tensile Strength, min

ksi :55



 Heat Treatment

Castings for heat-resistant service may be shipped in the as-cast condition without heat treatment. If heat treatment is required, the treatment shall be established by mutual agreement between the manufacturer and the purchaser and shall be so specified in the inquiry, contract, or order.

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