Galvanized Steel Sheet & Coil

ASTM Galvanized Steel Sheet & Coil

Curtis Steel is a leading supplier of galvanized steel sheet & coil.  Galvanized steel is defined as a carbon steel sheet coated with zinc on both sides.  There are two main processes used to produce galvanized steel: continuous hot dipping and electro-galvanizing.  

The hot dipping process consists of passing the steel through a bath of molten zinc, while the electro-galvanizing process consists of the application of zinc through electrolytic disposition.  The result is a layer of zinc tightly adhering to the base metal through an iron-zinc bonding layer.  Our hot dipped galvanized products are manufactured to ASTM A653 specifications; our electrogalvanized products conform to ASTM A879 specifications. 

galvanized steel

A zinc coating is one of the most effective and economical methods of protecting bare steel from a corroding environment. The zinc not only serves as a barrier between the steel and the environment, it will sacrifice itself to protect the underlying steel sheet. Sacrificial or galvanic protection occurs when two dissimilar metals are in contact and coupled with water and oxygen. Zinc corrodes preferentially to the iron in steel. This protection prevents corrosion of the steel at areas not covered with zinc. Thus, the spread of corrosion from cut edges, drill holes, etc. is minimized.

Material Types for Galvanized Coil and Sheet Steel

  • Commercial Steel (CS Types A, B, and C)
  • Forming Steel (FS Types A and B)
  • Deep Drawing Steel (DDS Types A and C)
  • Extra Deep Drawing Steel (EDDS)
  • Structural Steel (SS) – further designated by Grades (33,37,40,50,80)
  • High Strength Low Alloy Steel (HSLAS)

Additionally, the Hot Dipped Galvanized and the Galvannealed products are available in a variety of coating weights including G-90, G-60, G-40, and G-30 for the Hot Dipped Galvanized products, and A-60 and A-40 for the Galvannealed products.

Galvanized Steel Table

Product-Coated: Hot Dipped Galvanized | ASTM:A653 | Grade: CS-B | Surface:Min Spangle | Treatment: CT-DryG6028GA (.0217 MAX - .0157 MIN)364860G3030GA (.0187 MAX - .0127 MIN)3648***
G90 10GA (.1472 MAX - .1292 MIN) *** 48 60
  11GA (.1323 MAX - .1143 Min) *** 48 60
  12GA (.1174 MAX - .0994 MIN) *** 48 60
  13GA (.1014 MAX - .0854 MIN) *** 48 60
  14GA (.0865 MAX - .0705 MIN) 36 48 60
  16GA (.0696 MAX - .0575 MIN) 36 48 60
  18GA (.0566 MAX - .0466 MIN) 36 48 60
  20GA (.0506 MAX - .0356 MIN) 36 48 60
  22GA (.0436 MAX - .0296 MIN) 36 48 60
  24GA (.0316 MAX - .0236 MIN) 36 48 60
  26GA (.0247 MAX - .0187 MIN) 36 48 60

Typical Applications for Galvanized Coil and Steel Sheets

  • Exterior building products
  • Ductwork
  • HVAC products
  • Flashing
  • Electrical boxes and other electrical products
  • Roofing
  • Doors
  • Sashes
  • Automotive parts
  • Appliances
  • Commercial and residential steel framing
  • Parking lots
  • Truss plates
  • Metal building purlins
  • Any other products requiring a corrosion resistant material







As the primary supplier of galvanized sheet and coil to over 1500 customers for over 30 years, just let us know the end use of your product and we can help you find the material that is right for you. Call us at 1-800-749-4621 or contact us online and get a quote today!