① Plates to 1-1/2 in. [40 mm] Thick, Shapes with Flange or Leg Thickness to 3 in. [75 mm] inclusive, Sheet Piling, Bars, Zees, and Rolled Tees: Si≤0.40% .
② Manganese, minimum, by heat analysis of 0.80 % (0.75 % by product analysis) shall be required for all plates over 3/8 in. [10 mm] in thickness; a minimum of 0.50 % (0.45 % by product analysis) shall be required for plates 3/8 in. [10 mm] and less in thickness, and for all other products. The manganese to carbon ratio shall not be less than 2 to 1.
③ Structural Shape Flange or Leg Thickness： ＞25~50mm,Carbon≤0.23%,Manganese≤1.65%；
Structural Shape Flange or Leg Thickness： ≤25mm,Carbon≤0.26%,Manganese≤1.35%止剖；
④ maximum phosphorus content of 0.04 % and a maximum sulfur content of 0.05 % are permitted for the following materials： Structural shapes狂秦， Sheet piling蔓榄， Bars蛆存， Plates with widlhs up to and including 15 in. [380 mm].
⑤ Nb：Product analysis limits = 0.004~0.06 %.
⑥ V：Product analysis limits = 0.005~0.17%
⑦ Nb+V：Product analysis limits = 0.01~0.16%.
