HN 20 Chromium, 25 Nickel A297/A297M

HN 20 A297/A297M

GradeHN (CENT, INVEST, SAND)

Type20 Chromium, 25 Nickel

Chemical RequirementsComposition, %):

Carbon:0.20–0.50

Manganese, max:2.00

Silicon, max:2.00

Phosphorus, max:0.04

Sulfur, max:0.04

Chromium Nickel:19.0–23.0

Nickel:23.0—27.0

Molybdenum, max:0.50

Tensile Requirements

Tensile Strength, min

ksi :63

[MPa]:435

Yield Point, min

Ksi:

[MPa]:

Elongation in 2 in. [50 mm], min, % :8

 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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