ML20MN

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. No edition is stated on the website; Displayed under this source edition; contract applicability is not established

Mass percent, heat analysis, GB/T28906-2025 Table 2. ; 7.1.5 residual Cr/Ni/Cu are each ≤0.20% and Sn≤0.06%; tabulated alloy Cr is not subject to the residual maximum; 7.1.7 product-analysis tolerances follow GB/T222 and must not be directly treated as heat-analysis limits. ; The standard scope for hot-rolled cold-heading wire rod does not replace confirmation of actual supply dimensions and the component manufacturing process; Mechanical properties require separate verification. ; When measuring acid-soluble aluminum, Als0.015–0.055% is used and is retained separately from total aluminum Alt0.020–0.060%; The Al element field must be interpreted with the selected measurement condition.

GB/T6478-2015, Table 2, heat-analysis mass percentages. ; 6.1.5 residual Cr/Ni/Cu are each ≤.20%; tabulated alloy Cr is not subject to the residual Cr maximum. ; 6.1.7 product-analysis tolerances follow GB/T222 and do not widen the default heat-analysis range; Where Sn is unspecified, limits from a newer edition are not inserted. ; Specific dimensions, product condition and mechanical-property conditions require separate verification; composition alone does not establish suitability for forming a component. ; Alt is total aluminum ≥.020%; when measuring acid-soluble aluminum, Als≥.015% applies; no maximum is specified; The Al field must be interpreted according to the selected measurement basis.