① Silicon may be specified by the purchaser as 0.10 % maximum. The need for 0.10 % maximum generally relates to severely cold-formed parts
② These elements are considered as incidental and may be present to the table maximum amounts.
③ Standard alloy steels can be produced with a lead range of 0.15 to 0.35 %. Such steels are identified by inserting the lette “L” between the second and third numerals of the number, that is, 41 L40. A cast or heat analysis is not determinable when lead is added to the ladle stream