ZINCALUME® steel is aluminium/zinc/magnesium alloy coated steel that complies with AS/NZS 1397. Minimum yield strength is G550 (550 MPa), or G300 (300 MPa), depending on the product. Minimum coating mass is AM125 (125g/m2). The base metal thickness (BMT) is 0.42mm, 0.48mm or 0.60mm, depending on the product.