Astm A653 galvanized steel sheet is manufactured by pre-plating the sheet as per specification ASTM A653.
The continuous hot-dip coating process according to ASTM A653, Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process, is a widely used method to coat sheet products prior to fabrication.
In this process, steel is passed as a continuous ribbon through production and into a bath of molten zinc at speeds up to 600 feet per minute. Once the product is removed from the bath, high-pressure air is used to remove any excess molten zinc to create a closely controlled coating thickness. Afterward, the steel is cooled and rolled into large coils for eventual fabrication. Today, the continuous sheet process is used to make seven different types of hot-dip coated products, including galvanized (zinc), galvannealed (90-92% zinc / 8-10% iron alloy), two alloys of zinc and aluminum (55% aluminum / 45% zinc alloy and 95% zinc / 5% aluminum alloy), two aluminum based alloys (100% aluminum, 89-95% aluminum / 5-11% silicon alloy), and the terne coating (85-97% lead / 3-15% tin alloy).
ASTM A653 advantages
Thin-coated hot-dip galvanized materials have excellent welding ability and processing performance. It can be used from general use to deep drawing and can be selected according to the purpose.
Thick galvanized hot-dip galvanized materials have excellent corrosion resistance. Various applications can be used by selecting spangles and post-processing functions.
Hot-dip alloy steel not only has excellent corrosion resistance but also has good adhesion and ductility of the coating, so it can exert excellent processing performance. The advantage is that it has a beautiful appearance and can be used for applications where the surface is not painted.
ASTM A653 equivalent
ASTMA653 is an American standard, which is equivalent to the Japanese JIS G 3302, Europe EN 10346. Hot-dip galvanized steel sheet with a coating thickness of 0.3 oz/square inch. The material has general specifications.
