TECHNICAL PARAMETERS:

DESCRIPTION:

Alloy 2304 (UNS S32304) is a 23% chromium, 4% nickel, molybdenum-free duplex stainless steel. The Alloy 2304 has corrosion resistance properties similar to 316L. Furthermore, its mechanical properties, i.e., yield strength, are twice those of 304L/316L austenitic grades. This allows the designer to save weight, particularly for properly designed pressure vessel applications.

General Properties

Alloy 2304 is a 23% chromium, 4% nickel, molybdenum-free duplex stainless steel. The Alloy 2304 has corrosion resistance properties similar to 316L. Furthermore, its mechanical properties, i.e., yield strength, are twice those of 304/316 austenitic grades. This allows the designer to save weight, particularly for properly designed pressure vessel applications.

The alloy is particularly suitable for applications covering the -50°C/+300°C (-58°F/572°F) temperature range. Lower temperatures may also be considered but need some restrictions, particularly for welded structures.

With its duplex microstructure and low nickel and high chromium contents, the alloy has improved stress corrosion resistance properties compared to 304 and 316 austenitic grades.

Applications

Generally where 304 and 316L are used

Pulp and paper industry (chip storage tanks, white and black liquor tanks, digestors)

Caustic solutions, organic acids (SCC resistance)

Food industry

Pressure vessels (weight savings)

Mining (abrasion/corrosion)

Standards

ASTM/ASME.......... A240 - UNS S32304

EURONORM...........1.4362 - X2 Cr Ni 23.4

AFNOR...................Z3 CN 23.04 Az

DIN.........................W. Nr 1.4362

Corrosion Resistance

General Corrosion
Because of its high chromium content (23%) the corrosion resistance properties of 2304 are almost equivalent to those of 316L.