a. Cleanness. All grades shall be free of dirt, nonferrousmetals,
or foreignmaterial of any kind, and excessive rust and corrosion.
However, the terms âfree of dirt, nonferrousmetals, or foreignmaterial of any kindâ are not intended to preclude the accidental inclusion of negligible amounts where it can be shown that this amount is unavoidable in the customary preparation and handling of the particular grade involved.
b. Off-grade material. The inclusion in a shipment of a particular
grade of iron and steel scrap of a negligible amount of metallicmaterial which exceeds to aminor extent the applicable size limitations, or which fails to aminor extent tomeet the applicable requirements as to quality or kind ofmaterial, shall not change the classification of the shipment, provided it can be shown that the inclusion of such off-gradematerial is unavoidable in the customary preparation and handling of the grade involved.
c. Residual alloys.Wherever the termâfree of alloysâ is used
in the classifications given herein, it shallmean that any alloys contained in the steel are residual and have not been added for the purpose ofmaking an alloy steel. Steel scraps shall be considered free of alloys when the residual alloying elements do not exceed the following percentages:
Nickel .45% Molybdenum .10%
Chromium .20% Manganese 1.65%
The combined residuals other thanmanganese shall not exceed a total of 0.60 percent.
d. Deviations. Any deviations fromthe general classifications of iron and steel scrapmay be consummated bymutual agreement between buyer and seller.