ASTM A153 is the hot-dip galvanizing specification for hardware and fasteners that are spun or otherwise handled (torch and steel brush) after galvanizing to remove excess zinc. ASTM A123 is the hot-dip galvanizing specification for most other items (except single reinforcing bars).
Likewise, how thick is the zinc coating on galvanized steel?
Batch Hot-Dip Galvanizing. Batch hot-dip galvanizing produces thick coat- ings. The standard coating thickness requirement is 2 oz/ft2 (600 g/m2), 3.3 mils (85 µm). Thicknesses of 6 to 8 mils (150-200 µm) on structural steels are common.
Also to know, what is ASTM a123?
The specification ASTM A123/A123M covers individual steel pieces as well as assemblies of various classes of material. It is the responsibility of the galvanizer to ensure compliance with the specifications, as long as the product has been designed and fabricated in accordance with the supporting specifications.
How do you measure galvanized coating thickness?
There are two methods for measuring the zinc coating thickness of hot-dip galvanized steel; a magnetic thickness gauge and optical microscopy. The simplest and non-destructive way is to utilize a magnetic thickness gauge, as optical microscopy is a destructive test only used to resolve measurement disputes.
Is standard for galvanizing?
The basic specification for hot dip galvanized coatings on iron and steel articles is defined by a single standard, EN ISO 1461 'Hot dip galvanized coatings on iron and steel articles – specifications and test methods'. However, there are some exceptions to this standard (see thicker coatings below).