Stainless Steel 304 Seamless Tubes is covered by highly protective film of chromium oxyhydroxide. In order to achieve the desired lower cost, Stainless Steel 304 Welded Tubes is specifically developed to include less of the more expensive elements nickel and chromium and higher percentages relatively of inexpensive carbon. Intergranular corrosion may be compromised if Stainless Steel 304 EFW Tubes is heated between 800 degrees F (427 c) and 1650 F (899 C) or cooled slowly through that range. Stainless Steel 304 ERW Tubes contains up to 0.08 % carbon therefore subject to sensitisation and ‘weld decay’ - corrosion after heating to about 650 °C as would usually occur in the heat affected zone adjacent to a weld. Fabrication methods involving cold working may require an intermediate annealing stage in these Stainless Steel 304 Round Tubes to alleviate work hardening and avoid tearing or cracking. Our Stainless Steel 304 Square Tubes has Ease of fabrication, Beauty of appearance, Excellent formability, Ease of cleaning, etc.