What is AS1397?
AS1397 specifies requirements for continuously hot-dip metallic coated sheet steel & strip.
What does AS1397 specify?
AS1397 specifies requirements for continuously hot-dip metallic coated sheet steel & strip (supplied in thicknesses up to & including 5.0mm). It applie to the STEEL BASE and COATING of metallic coated steel products.
Requirements covered in this standard are:
- Formability grades of steel
- Structural grades of steel
- Classes of zinc coating, including differential coatings
- Classes of zinc coating converted to zinc/iron alloy
- Classes of zinc/aluminium coatings
- Classes of zinc/aluminium/magnesium alloy coating
- Classes of aluminium/ zinc alloy coating
- CLasses of aluminium/zinc/magnesium alloy coating
- Surface finish
Three new coating types intrpduced in 2011 standard update:
- Zinc and aluminium (Type ZA)
- Zinc, aluminium and magnesium (Type ZM)
- Aluminium, zinc and magnesium (Type AM)
AS1397 states that "the product designation shall comprise the following elements:
- the number of this Australian standard i.e. AS1397
- the steel grade
- the coating class and surface finish
AS1397 states that "the sheet or strip shall be legibly and durably marked with the number of this Australian Standard i.e. AS1397, the base steel thickness, and the designation of the steel base and coating, unless such markings are detrimental to the end use, in which case the packaging shall be so marked".
Areas of non-compliance could be: thickness, grade, tolerances, coating, elongation.
Unmarked steel is a risk:
- it may be made to another standard altogether
- test certificates are not sufficient (how do we know they match the steel)