* SAE Only
Note 1. Silicon When silicon ranges or limits are required, consult producer for ranges and limits.
Note 2. Copper When copper is required, 0.020 per cent minimum is generally specified.
Note 3. Lead See footnote for lead under Table 2.
Silicon: When silicon is required, the following ranges and limits are commonly used.
Lead: When required, lead is specified as an added element to a standard steel and is identified by inserting letter “L” between second and third numerals.
NOTE: The chemical ranges and limits shown are subject to the check analysis tolerance shown in the A.I.S.I. Manual for Alloy, Carbon and HSLA Steels.