ML42CRMO

Clause 6.1.1 of GB/T5953.1/.2:2009 follows the relevant standards identified in the contract; This is reference composition for the same designation under GB/T6478; the applicable standard must be confirmed by contract, and these values are not directly treated as mandatory composition under 5953. Historical data from an earlier edition. No edition is stated on the website; Displayed under this source edition; contract applicability is not established

GB/T28906-2025 Table 3: Hot-rolled wire rod of quenching-and-tempering-type cold-heading steel; heat analysis, mass fraction %.. ; Note a: Aluminum may be added to improve cold-heading performance, with Alt≤0.060%; this option does not make addition mandatory by default.. ; Note b: Through negotiation between the supplier and the buyer, Si may be lower than 0.10%; In this case, aluminum must be added and Alt≥0.020%.. This record defaults to the Si range listed in the table; do not arbitrarily fill in when no specific low-silicon agreement range is given. ; Note c: For the first 11 grades in Table 3, Cr may be added by agreement to improve hardenability and mechanical properties; the addition amount must be confirmed by both parties; When no agreement is provided, residual Cr ≤ 0.20% according to 7.1.5. ; 7.1.5 Residual Cr, Ni, and Cu are each ≤ 0.20%, and residual Sn ≤ 0.06%; The residual Cr upper limit is not applicable when Cr has a listed alloy range in the table. ; 7.1.7 Unless otherwise specified in the table, the permissible deviation of the finished product chemical composition shall be according to GB/T222; heat analysis values shall not be substituted for finished product tolerances. ; The original text applies to 5–52mm hot-rolled wire rod for cold heading; specific product specifications, supply, and processing routes still need to be confirmed; Mechanical properties to be verified separately.

GB/T6478-2001, Table 3, heat analysis wt%; 6.1.4 residual Cr/Ni/Cu are each ≤.20%; alloy Cr ranges are not subject to the residual maximum. ; 6.1.8 product-analysis tolerances require separate verification under GB/T222-1984, Table 2, and do not widen the default heat-analysis range. ; Actual 2001 edition; Composition from editions 2015 or 2025 is not substituted for this edition; specific dimensions and delivery mechanical properties require separate verification.

Q/BQB 517—2023, official original on the Baosteel website, Table 1, row 92; cast-analysis mass fraction wt%. Table footnote a: residual Cr≤0.20, Ni≤0.20, Cu≤0.20, Mo≤0.06 wt%; where this row specifies otherwise, its requirement for that element takes precedence. Unlisted elements and special agreement requirements must not be treated as zero or assumed guarantees; permitted product-analysis deviations are governed separately by GB/T 222. Wire rod is delivered hot rolled; stricter P/S under Z1 and special surface or inclusion quality must be confirmed under normative Annex A and the contractual ordering codes. Fixed mechanical properties must not be inferred from the chemistry table.

Zhongnan Steel Q/ZNGF 01.7—2023, Table 1, row 67 (PDF page 7), cast analysis wt%; footnotes, delivery process and orders must be confirmed against the corresponding edition. This does not constitute a supply commitment by Creation Group.