ASTM A213/ ASTM A312 Tp309/Tp309s/Tp309h Seamless Stainless Steel Tube

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.

309S stainless steel pipe 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. Alloy 309 is highly weldable and cold formable, although it does require stronger forming machines and continuously increasing pressure. Typical machining methods are used for stainless steel grade 309, but it is tougher and does tend to harden more quickly. Like 310 Stainless Steel, 309S Stainless Steel has a high chromium and nickel content which grants excellent resistance to aqueous corrosion.

309S Stainless Steel Pipe manufacturer according to ASTM A213 and ASTM A312 ASTM A269 specifications.

Annealed ConditionThe properties quoted in this publication are typical of mill production and unless indicated should not be regarded as guaranteed minimum values for specification purposes.

1. 309S Stainless Steel Tubing Mechanical Properties at Room Temperature  

309S Stainless Steel Tubes Creep Data
Stress to develop a creep rate of 1% in the time indicated at the temperature indicated.
 

Creep Rupture Stress
 

Maximum Recommended Service
Temperature
(Oxidising Conditions)

Continuous 1100°C
Intermittent 980°C

Annealing. Temperature between 1050°C and 1150°C and water quenching. This kind of heat treatment ensures that all carbides are in solution.
2. 309S Stainless Steel Tubing Stress Relieving 250-400°C for 1 hour.
3. 309S Stainless Steel Tubing Hot Working
Initial forging and pressure 1150-1 200°C
Finishing temperature 1000°C