Galvanized steel coil is processed by covering a layer of aluminum-zinc alloy which is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at 600℃ high temperature. The entire structure is made of aluminum-iron-silicon-zinc, and form into a kind of dense crystalline quaternary alloy coated steel.

Gade	Yield strength Rel & RP0.2/Mpa	Tensile strength Rm/Mpa	Elongation at break A80% NOT LESS
DX51D+AZ	-	≤500	22
DX52D+AZ	≤300	≤420	26
DX53D+AZ	≤260	≤380	30
DX54D+AZ	≤220	≤350	36
S250GD+AZ	≤250	≤330	19
S280GD+AZ	≤280	≤360	18
S320GD+AZ	≤320	≤390	17
S550GD+AZ	≤550	≤560	-

Usage

Construction

Galvalume roofing, ducting pipe

Auto

Automotive components

Electrical appliances

Computer shell