ML37CRB

GB/T6478-2015, Table 4, 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. ; Table 4 Note a: the lower limit of Si may be agreed to be lower than .10%; the specific agreed range is unknown and shall not be filled in arbitrarily. ; Note b: when hardenability and mechanical properties meet the requirements, the B lower limit may be relaxed to .0005%; Selecting this condition does not represent that performance verification has been completed.

GB/T6478-2001, Table 4, 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. ; Table 4 total aluminum Alt≥.020%; An acid-soluble aluminum determination satisfying Als≥.015% is also acceptable; Default B in this edition is .0005–.0035%.