309 stainless steel tubing

309 Stainless Steel Tubing

Product Description

309 Stainless Steel Tubing

309 Stainless Steel Tubing

309S/309 stainless steel tubing is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic Alloy 304.


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 temperature. It is tough and ductile, and can be readily fabricated and machined.309S is the low-carbon version of 309, and is recommended for applications where sensitisation, and subsequent corrosion by high temperature gases or condensates during shutdown may pose a problem.309 is manufactured to ASTM A 167 and 309S to ASTM A240 specifications.


Grade 309 stainless steel tubing is used often for higher temperature applications. While its oxidation resistance surpasses that of alloy 310, its resistance to corrosion is equivalent to that of alloy 310.


Applications of 309 Stainless Steel Tubing:

Chemical Composition (ASTM A240)

 SX  C  Mn  P  S  Si  Cr  Ni
 0.20 max
0.08 max
 22.0 –
12.0 –