Electrogalvanized Steel Coils

Electrogalvanized is the most common type of electrolytic coated sheet. Electrogalvanized is produced from a cold rolled substrate, upon which a very thin layer of zinc has been electrolytically deposited to one or both sides. Because the zinc coatings are much thinner compared to hot-dipped, the product is usually intended for interior applications having little atmospheric exposure. Most Electrogalvanized is very well suited for painting, especially given its smooth surface. And with its lighter coating weights, it offers better weldability than hot-dipped Galvanized. The finish is typically light grey and spangle-free. It's forming characteristics are very similar to those of Cold Rolled; weldability is very good. Because of its generally higher cost and lower rust-resistance compared to Galvannealed, Electrogalvanized has lost considerable market share (especially for automotive applications). It is normally produced to ASTM A879 standards and tolerances. Other rarer types of Electrolytic coated sheet include Electro Zinc-Nickel and Electro Zinc-Iron Alloy.

Electrogalvanized Coating Designations
Coating Desig. oz/ft²	Min. oz/ft²	Max. oz/ft²	Coating Desig. g/m²	Min. g/m²	Max. g/m²	Coating Name Prior
32Z	0.32	.46	98G	98	140
30Z	0.30	0.43	90G	90	130
23Z	0.23	0.36	70G	70	110
20Z	0.20	0.30	60G	60	90
13Z	0.13	0.23	40G	40	70
08Z	0.08	0.16	24G	24	45	Double
07Z	0.07	0.13	40G	40	70
04Z	0.04	0.10	12G	12	30	Full
02Z	0.02	0.08	06G	6	25	Intermediate
01Z	0.01	0.05	03G	3	15	Flash
00Z	none	none	00G	none	none

Coating Conversion Formula
Convert From	Convert To	Multiply By
ounces/square foot (oz/ft²)	grams/square meter (g/m²)	305.15
grams/square meter (g/m²)	ounces/square foot (oz/ft²)	0.00328

Classifications and Mechanical Properties
Classification	Yield Str. psi typical	Tensile Str. psi typical	Elong. % / 2" typical	Rockwell B typical
Commercial Steel (Type B)	31000	48000	40	45
Drawing Steel (Type B)	28000	46000	44	37
Extra Deep Drawing Steel	25000	45000	45	30