ASTM Galvanized Coil

The standard’s number indicates the weight of zinc applied on the surface of the steel sheet.

Aside from the ASTM standard, there is also the SI Metric system. Both systems are similar, except that the SI system converts the inch and pound weight into ounces per square foot (oz/ft2) to the SI standard of the mass in grams per square meter (g/m2).

Here is a sample conversion directly associated with Z275:

1 oz/ft2 is equal to 305.15 g/m2

And to convert from ASTM standard to SI ASTM galvanized coil system, you need to multiply by 305.15.

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