This document@ as referenced in the applicable product specifications in procurement documents@ contains: a. A catalog of the standard carbon steels@ alloy steels (including H-steels)@ and stainless and heat-resisting steels that are designated by chemical composition@ or (for H-steels) by chemical composition and hardenability limits by reference to standard industry documents. b. Rules for designating the chemical content of carbon steels@ alloy steels@ and stainless and heat-resisting steels that are not classified as standard.