SX 309 Technical Data
SX 309 is a highly alloyed austenitic stainless steel used for its excellent oxidation resistance, high temperature strength and creep resistance. The lower nickel content of SX309 improves resistance to sulphur attack at high temperatures. It is tough and ductile, and can be readily fabricated and machined. SX 309S is the low-carbon version of SX 309, and is recommended for applications where sensitisation, and subsequent corrosion by high temperature gases or condensates during shutdown may pose a problem.
SX C Mn P S Si Cr Ni N 1.4833 0.15max 2.00 0.045 0.015 1.00 22.0 - 12.0 - 0.11
12.0 - 0.11
Mechanical Properties at Room Temperature
Proof Stress (0.2% Offset) MPa min205
Elongation (Percent in 50 mm) longitudinal 35% transverse 25%
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