4145H

SAE J1268 MAY2010 official original Table 2 and notes 1–6, ladle analysis (wt%). Note 1 applies within the stated scope: cross-sectional area ≤0.13 m², width 460 mm and piece mass 4.5 t; product deviations are handled separately under J409 and are not added to default limits. Note 2 residual maxima Cu≤0.35/Ni≤0.25/Cr≤0.20/Mo≤0.06 apply only when the element is not specified; listed alloy ranges take priority. Note 3: open-hearth/oxygen steel P≤0.030/S≤0.040; basic electric-furnace steel P and S each ≤0.025. The original note 5 identifies E4340H/E9310H as electric-furnace steel. Note 6: boron steel B 0.0005–0.003%; do not add boron to ordinary grades without B. Retain the explicit H-grade to UNS mappings from the source; do not merge them with grades without H. Hardenability bands, grain size, cold-heading process and supply require separate verification.

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.

China Steel bar and wire-rod catalogue CAT.NO.3-BD-01-2014-C1, PDF page 25

printed page 23, 7.1.19 SAE alloy H steel (edition not stated). The original catalogue does not explicitly identify the analysis type for this table. Historical manufacturer range data, not guaranteed standard limits or heat-specific measurements; this does not establish supply by Creation Group. Condition: residual Cu/Ni/Cr/Mo maxima are added only for elements unspecified in the main table and do not override principal alloy-composition ranges.