304 stainless steel pipe is a stainless steel pipe made from iron, chromium, and nickel alloy. Silver Tubes is a known manufacturer of Stainless Steel 304 Pipes, a variation of the basic 18-8 grade, with higher chromium and lower carbon content. SS 304 Pipes are non-hardenable by heat treatment. Annealing: Heat to 1900 Degrees F – 2050 Degrees F (1038 Degrees C – 1121 Degrees C), then... https://www.silver-tubes.com/stainless-steel-304-pipe-supplier-exporter.html