Steel Buyers Basics: Mill Coating Extras

For HDG coil there is a thickness and width extra chart and an additional extra chart related to the coating weight of Zinc being put on the substrate.  The first chart is similar to what we have seen before – extras based on the thickness/width of the coil.  For instance for US Steel’s Fairfield Mill the width/thickness extra for 0.015” min x 40” coil is $3.50/cwt.

However, the second chart for coating extras we have not seen before. Here is an example based on coil thickness (note that width is not relevant for coating weight extras):

If your coil specification is 0.015” min G90 then your coating weight adder (extra) is $10.35/cwt using the first line of the table referenced above. It would be unwise to specify 0.0149” min thickness since that increases the extra cost for G90 from $10.35/cwt to $12.00/cwt. The extra footage gained would not justify the extra cost.  

Hot Dipped Galvanized, just like Hot Rolled and Cold Rolled coil, has a series of other extras related to steel grade and processing.  

In the US Steel price book, following the HDG extras section, the Galvalume and Electrolytic Galvanized pricing extras are shown. The pricing in that section is different than Galvanized but is presented in the same fashion as shown above.

Next time a shift of gears to a more general point of view on purchasing.