Nascent Pipe & Tubes is associated with offering an incomprehensible bundle of Treated Steel 321/321H Flanges as a Manufacturer, exporter, stockiest and supplier to our family and in general clients. Mix 321 (UNS S32100) is titanium settled austenitic Hardened Steel Flanges with uncommon general disintegration resistance. Mixture 321H (UNS S32109) Hardened Steel Flanges is the higher carbon (0.04 - 0.10) change of the mix.