4626H

ASTM A304—2020 Tables 1 and 2 and 7.1 specify ladle analysis, mass fraction (wt%); this is an excerpt from the published edition, not verification of the complete standard. The scope is hot-worked carbon, alloy and carbon-boron steel bars with hardenability requirements; the H suffix must not be omitted or treated automatically as an ordinary grade. Product-analysis tolerances in Table 1 note 3 must be checked separately against A29/A29M; tolerances and hardenability bands were not reproduced here, and composition alone does not establish compliance with all H-steel requirements. Unlisted elements are not zero; residual-element maxima not specified in Table 1 note 2 are included for the applicable elements. Table 1 note 2 is not automatically applied to Table 2. A leaded variant requires the separate L designation in the source; Pb 0.15–0.35% has not been added to ordinary H grades. The boron-steel footnote states an expected minimum boron content of 0.0005%; it is listed separately and is not presented as a composition acceptance limit. Chemistry outside this table requires agreement between purchaser and supplier. Inclusion in the standard-material database does not establish cold-heading supply capability or direct substitutability; processing and supply conditions must be confirmed separately.