API 6A - Table-11 - Steel composition limits

[Rohithgowda]

what exactly footnotes -a indicate , since carbon max. shown 0.45 % mass fraction for carbon however footnote-a shows 2 % mass fraction
which one is it refer max. in 0.45 or 2% mass fraction ?

 

[jmec87]

The footnotes are intended to be informative definitions of carbon steel and low-alloy steel.

The 0.45% max shown in the table is the applicable limit for carbon and low-alloy steels.