50B60

Heat analysis chemical composition mass fraction wt%; Apply product-analysis deviations under Table 6 separately; do not add them to heat-analysis limits.. Table 2 Note 1: Cu/Ni/Cr/Mo not specified as alloying ranges are allowed to be ≤0.35/0.25/0.20/0.06% respectively; Explicit alloy ranges shall take priority. Note A: The purchaser may specify Si≤0.10%, which shall be treated as a different condition from the Si range listed in the table, and the union of the two shall not be taken. Note 4: Pb is 0.15–0.35% only when lead-bearing steel designated L is separately specified.; Ordinary grades do not automatically include Pb. This standard provides general requirements for hot-worked bar products and cannot be used to commit to cold-heading suitability or supply based solely on chemical composition. Note C is for an expected B content of 0.0005–0.003%; If usual Ti addition is not permitted, B can be expected up to 0.005%. This is an expected description from the original text and is not a unified mandatory range for all deliveries; Fixed B limits shall not be added if specific contract conditions are not selected.

Original ASTM A29/A29M-2023, Table 2: the basic table gives heat-analysis mass fractions wt%; Product-analysis tolerances require separate confirmation under 4.3 and Table 6 and are not added to heat-analysis limits. When 4.1.1 is ordered by a grade in this table, the corresponding heat-analysis limits must be met; Other ordered compositions require separate agreement under 4.1.2 and Table 3/4 and are not merged into this table. General requirements for hot-worked bars; chemistry alone does not establish cold-heading suitability, supply or mechanical properties. Table 2 Note 1: For elements where no alloy range is specified, the residual upper limits for Cu/Ni/Cr/Mo are 0.35/0.25/0.20/0.06% respectively; The alloy range specified in this row shall take priority. Table 2, Note A: The purchaser may specify Si≤0.10%; select this condition separately from the Si range in this row, without combining their ranges.. Table 2 Note 4: When L lead-bearing grades are separately specified, Pb is 0.15–0.35%; When lead is added to the ladle stream, its cast/heat-analysis content cannot be determined; do not automatically create lead-bearing grade records or add lead to ordinary-grade compositions.. Table 2 Note C: expected B 0.0005–0.003%; Where the usual Ti addition is not permitted, the expected maximum is 0.005%.. In the absence of determined contract conditions, a uniform mandatory B limit shall not be fabricated; Unlisted B shall not be assumed as zero.