A890 2A

ASTM

A890 2A

ASME

SA890 2A

Type

24Cr-10Ni-Mo-N

ACI

CE8MN

UNS -Cast

J93345

Overview

Grade 2A is a duplex stainless steel casting alloy designated under ASTM A890/A890M, designed for pressure-containing components requiring high strength and corrosion resistance in aggressive service environments. With a balanced austenitic-ferritic microstructure and alloying elements including chromium, nickel, molybdenum, and nitrogen, Grade 2A provides enhanced resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. This grade is particularly suitable for components exposed to seawater, brine, and a variety of chemical processing media. It offers an excellent combination of mechanical properties and corrosion performance, making it a popular choice for pump housings, valve bodies, heat exchangers, and other critical parts used in marine, oil and gas, and industrial processing systems.

Chemical Composition

Carbon

0.08% Max

0.08% Max

0.08% Max

Manganese

1.00% Max

Silicon

1.50% Max

Phosphorus

0.04% Max

Sulfur

0.04% Max

Chromium

22.50 - 25.50%

Nickel

8.00 - 11.00%

Molybdenum

3.00 - 4.50%

Nitrogen

0.10 - 0.30%

Mechanical Properties

Yield Strength

65 ksi Min

Tensile Strength

95 ksi Min

Elongation at 2 in

25% Min

Resources

ASTM Standard

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© Alloy Casting Industries Ltd 2025

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© Alloy Casting Industries Ltd 2025

Subscribe to our newsletter and stay in touch with us.

© Alloy Casting Industries Ltd 2025