Austenitic
Duplex Steel
Nickel Alloy
Cobalt Alloy

S32304 （1.4362）

Summary

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.
UNS S32304, is a lean duplex steel, similar to other duplex steels with it’s high strength and resistance to chlorides stress corrosion cracking however, due to its lower alloying content it has a lower level of pitting and crevice corrosion resistance (PREN approximately 26). As it contains very little Molybdenum, 2304 is a good economical alternative to 316L in some applications although 2304 is not recommended for use above 300℃. Also knows by the Uranus 35N and SAF2304.
The alloy is particularly suitable for application covering the -50℃/+300℃(-58℉
/572℉) temperature range. Lower temperatures may also be considered, but need some restrictions particularly for welded structures. With its duplex microstructure, low nickel and high chromium contents, the alloy has improved stress corrosion resistance properties compared to 304 and 316 austenitic grades.

Products

omposition Wt,%

1.4362 Composition % according to EN-10216-5

C

Si

Mn

P

S

Cr

Mo

Ni

N

Cu

Min

22.00

0.10

3.50

0.05

0.10

Max

0.03

1.00

2.00

0.035

0.015

24.00

0.60

5.50

0.20

0.60

S32304 Composition % according to ASTM A789,ASTM A790

C

Si

Mn

P

S

Cr

Mo

Ni

N

Cu

Min

21.50

0.50

3.00

0.05

0.50

Max

0.03

1.00

2.50

0.040

0.040

24.50

0.60

5.50

0.20

0.60

Solution annealing：950-1050℃

Density：7800kg/M³

Hardness Brinell 290 Max

Tensile Strength @ Break 600 Mpa/87000psi Min

Tensile Strength @ Yield 400 Mpa/58000psi 0.2% offsett

Elongation of Elasticity in tension 200Gpa 28500 ksi