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Test coupon from A297 HH melt.

A297 HH

Heat Resistant Stainless

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Comparative Classifications

ASTM Specification

A297

ASME Specification

SA297

UNS (Cast)

J93503

UNS (Wrought)

S30900

SAE

309

AISI

Carbon:

0.20 - 0.50%

Silicon:

2.00% Max

Phosphorus:

0.04% Max

Manganese:

2.00% Max

Sulfur:

0.04% Max

Chromium:

24.00 - 28.00%

Nickel:

11.00 - 14.00%

Molybdenum:

0.50% Max

Nitrogen:

Nitrogen + Carbon:

Vanadium:

Tungsten:

Aluminum

Titanium:

Copper:

Columbium:

Barium:

Boron:

Zirconium:

Cerium + Lanthanum:

Iron:

Residual Elements:

Tensile Strength:

75 ksi Min

Elongation at 2 in:

10% Min

Reduction of Area:

Yield Strength:

35 ksi Min

Chemical Composition

Physical Properties

Alloy Specification

Related Alloys

Frequently Asked Questions