1, JISG3321-1998 specifies the characteristics of steel of commercial, drawing and structural quality coated by a continuous hot dipped aluminum/zinc alloy coating process. The aluminum/zinc alloy composition by mass is nominally 55% aluminum, 1.6% corrosion characteristic of aluminum couple with these of zinc are desired.
2, Coating mass
The coating mass designations are 090, 100,150, 165,185 and 200.
The coating is expressed as the total mass on both surface in g/㎡。 The coating mass specified shall be compatible with the desired service life, the thickness of the base metal and the forming requirements involved.
Coating type: the type of coating is designated as:
N: normal spangle coating( as coated)
S: skin-passed for improved surface(smoother) condition.
Surface treatment the surface treatment is designated as:
A oiling
B mill passivation plus oiling
C mill passivation
D no surface treatment
Base metal quality under the JISG3321-1998 standard
Commercial quality,
Drawing quality
Deep drawing quality
Continuous hot dip aluminum zinc coated steel sheet
Product obtained by hot dipped coating steel sheet coils on a continuous aluminum zinc coating line to produce either coated coils or cut lengths
Type of aluminum zinc coating
Normal spangle finish coating: coating formed as a result of unrestricted growth of aluminum zinc crystals during normal solidification
JISG3321-1998 aluminum zinc steel mooth finish: smooth finishing produced by skin-passing the coated material in in order to achieve an improved surface condition as compared with the normal as coated product.
We, bebon international CO.,ltd can offer all above technical details. For the special requirements for the hot dipped aluminum zinc steel products, we may require negotiations between the supplier and customer. In this way, we can meet customer’s specific requirements. Please contact us freely if you have any questions or inquiry in hand about hot dipping aluminum zinc steel products. We will offer you the most professional service and quality.