Alloy 309 can be simply welded and processed by commonplace store fabrication practices. When heated between 1202 – 1742°F (650 – 950°C) the alloy is topic to sigma section precipitation. A solution annealing remedy at 2012 – 2102°F (1100 – 1150°C) will restore a level of toughness.
The information, materials and opinions provided by this Steel finder on-line software are for basic functions solely and aren’t meant to represent skilled advice or warranty of any kind. By using this Steel finder online software you agree to be sure by the Disclaimer. The mostly used international product standards are given in the table under. Carbide precipitation can happen within the 300 sequence in the temperature vary 800 – 1600° F.
If carbide precipitation does occur, it may be removed by heating above 1900° and cooling shortly. These compositions exclude phosphorus (P), sulfur (S), and silicon (Si). Chemical composition necessities might range with the specific product necessities so please discuss with the suitable specification.
Anneal at 1900 – 2050°F (1038 – 1121°C), then water quench or rapidly air cool. The properties quoted in this publication are typical of mill manufacturing and except indicated shouldn’t be thought to be assured minimum values for specification purposes. Alloy 309 can be readily welded by most traditional processes together with TIG, PLASMA, MIG, SMAW, SAW and FCAW. The alloy is quite ductile and varieties in a way very similar to 316. Cold forming of pieces with long-time period publicity to high temperatures isn’t really helpful since the alloy is topic to carbide precipitation and sigma section precipitants.