Prepurchasing Steel

In order to guarantee the finish, quality & cost saving of the hot dip galvanizing process, full cooperation between fabricator and galvanizer should be established.

Steel Purchasing: The steel fabricator purchaser should do all the efforts to Purchase the steel under the following chemical composition:

• Level of Carbon less than 0.25%
• Phosphorus less than 0.04%
• Manganese less than 1.35%
• Silicon levels less than 0.04% or between 0.15% - 0.22%

The most common reason for galvanized steel to have different appearance is the chemistry of the steel pieces. There are two elements of steel chemistry, which most strongly influence the final appearance: Silicon and Phosphorus. Both of them promote coating growth, and this thicker coating is responsible for the differing appearance (thicker coating also causes extra costs).