Page 1 - SD 2304

PRODUCT DATA SHEET

Corrosion Stainless Steel

DUPLEX STAINLESS STEEL GRADE

SD 2304 is a 23% Cr, 4% Nickel, Mo free duplex stainless steel (23.04). The alloy
SD 2304 has similar 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, low nickel and high chromium contents, the alloy
has improved stress corrosion resistance properties compared to 304 and 316
austenitic grades.

STANDARDS EURONORM .............................. 1.4362 - X2 Cr Ni 23.4
AFNOR ...................................... Z3 CN 23.04 Az
DIN ............................................ W. Nr 1.4362
ASTM. ....................................... A240 - UNS S32304

CHEMICAL Typical values (Weight %)

ANALYSIS C Cr Ni Mo N Others
0.2
4
.020 23 PREN = [Cr %] + 3.3 [Mo %] + 16 [N %]  24 0.1 S = 0.001

MECHANICAL Tensile Properties (minimum values)
PROPERTIES °C Rp 0.2 Rp 1.0 MPa °F YS 0.2% YS 1.0% UTS Elongation
Rm
MPa
%
MPa
KSI
KSI
KSI
20 400 440 600 68 58 64 87 25
100 330 365 570 212 48 53 83 25
200 280 310 530 392 41 45 77 20
300 230 260 490 572 33 38 71 20

Values obtained for hot rolled plates (th  50 mm). SD 2304 grade must not be
used for a long time at temperatures higher than 300°C ( 572°F), where
precipitation hardening phenomenon occurs.