Page 1 - SH 253

PRODUCT DATA SHEET

Corrosion Stainless Steel

HEAT RESISTANT STAINLESS STEEL

SH 253 grade is a fully austenitic stainless steel containing 21 Cr, 1.7 Si, 0.17 N
and Rare Earth elements (Cerium, Lanthane,...) which make the alloy
particularly well designed for high temperature applications.

The nitrogen additions stabilize the austenitic microstructure, particularly at high
temperatures. The alloy is less susceptible to embrittlements effects occuring after
long term exposure. Creep properties are enhanced, due to high Chromium and
Nitrogen. Rare Earth elements (Ce, La,...) are added in order to anchor the oxide
protective film and improve the resistance of the steel to oxide spaling. As a
result, the alloy is much more resistant to high temperature thermal cycling effects
in oxidizing atmospheres compared to SH 310.

SH 253 grade may be used up to 1100°C (2012°F in oxidizing environments.
Thermal cycling effects, sulphur containing atmospheres and low oxygen contents
reduce the high temperature resistance of the steel.

STANDARDS EN 10095 ...................................... X9 Cr Ni Si N Ce 21-11-2 -1.4835
AFNOR.......................................... (Z10 CNS 21 11)
DIN ................................................ W.Nr 1.4835
ASTM. ........................................... UNS S 30815

CHEMICAL Typical values (Weight %)
ANALYSIS C Cr Ni Si N Others
0.08 21 11 1.7 0.17 RE* : 0.04
*RE : Rare Earth elements like Cerium, Lanthane...

MECHANICAL Typical tensile properties after solution annealing heat treatment
PROPERTIES
Rp 0.2 Rp 1.0 YS 0.2% YS 1.0% UTS El%
KSI
KSI
KSI
MPa
MPa
680
100 620 212
200 570 392
400 520 752
600 450 1112
800 (120) (125) (260) 1472 (17) (18) (38)
Results obtained on 10 mm hot rolled plates