439 AL (Aluminized) Stainless Steel Coated with Type 1 hot dip aluminum coating. Data Bulletin Stainless Steel Types: 409 Stainless Steel 409 ULTRA FORM® SS 409 Ni (Nickel Modified) Stainless Steel 409 AL (Aluminized) Stainless Steel 409-30 Stainless Steel 409L Stainless Steel 439 Stainless Steel 439 ULTRA FORM® SS 439 AL (Aluminized) Stainless Steel 18 Cr-Cb Stainless Steel 441 Stainless Steel
