Galvanizing "Grades" 2

• Nov 4, 2002

• #2

Ginger

New member

May 8, 1999

284

GB

Try the following link for information on hot dip galvanising:-

http://www.hdg.org.uk/specifying/standards.htm

 

Upvote 0 Downvote

• Nov 4, 2002

1
• #3

Mattman

Structural

Jul 20, 2001

64

US

US Steel has a good web page for galvanizing grade reference:

http://www.usx.com/corp/sheet/coated/hotapp.htm

A60 and A40 are ratings for galvannealed steel. This is a hot-dipped process where the steel is heated after coating with zinc, converting the zinc coating into a harder zinc-iron alloy coating, that is also smoother, more scratch-resistant, and more paintable than a galvanized finish.

Ordinary galvanized steel has only a thin layer of the zinc-iron alloy, at the interface of the steel and the zinc. The outer coating remains zinc.

I believe that the A60/A40 coating thicknesses are equivalent to the G60/G40 galvanized coating thicknesses.

 

Upvote 0 Downvote

• Nov 4, 2002

• Thread starter
• #4

LPPE

Structural

May 16, 2001

578

US

Excellent site, Mattman, thanks.

 

Upvote 0 Downvote

• Nov 4, 2002

1
• #5

Ron

Structural

Sep 24, 1999

16,336

US

pylko...the designations "G60" and "G40" refer to hot dip galvanizing average weights of 0.60 ounces per square foot (both sides) and 0.40 ounces per square foot respectively. The metric equivalents are 60 g/sq.m and 40 g/sq. m respectively.

 

Upvote 0 Downvote

• Nov 5, 2002

• #6

whyun

Structural

Aug 14, 2002

972

US

ASTM Standards A525 are the specifications for hot-dipped gavanization. My version is for 1987.

Also refer to ASTM A446.

Distinction of G designation versus A designation is in the chemical. G designation is a zinc alloy and A designation is for Zinc-iron alloy. I am not an expert on galvanization so I hope you can find what you are looking for in the ASTM Specs.

 

Upvote 0 Downvote