SS 304 Elbow, Tee, Reducers, Cross – Manufacturers & Suppliers SS 304 Elbow, Tee, Reducers, Cross – Manufacturers & Suppliers: SS 304 Elbow, SS 304 Reducers, SS 304 Tee, SS 304 Cross: Stainless Steel material is selected especially when used in corrosive environments. Stainless Steel is grouped into five main classes: Martensitic stainless steels, Ferritic stainless steels, Austenitic stainless steels,