ASTM A36: Standard Specification for Carbon Structural …
Mangahese content of 0.85-1.35. F.or each reduction of 0.01 % % and silicon content of 0.15-0.40 % is required for shapes over 426 Ib/tt [634 kg/m]. below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to the maximum of 1.35 %.
