C48DB · Wire rod for general-purpose wire drawing

• Cast analysis; composition is expressed as mass fraction, %. An unspecified lower limit is not zero.
• Class A: Mn 0.30%–0.60%; class B: Mn 0.60%–0.90%. These classes apply only to C26D–C92D and are agreed at ordering.
• 4.2.4: Unlisted elements shall not be intentionally added without purchaser consent. Cr and V may be added by agreement at ordering: Cr≤0.30%, V≤0.10%.
• 4.2.5: For C26D–C92D, agreement may raise the C upper limit by 0.01% or lower the lower limit by 0.01%. This does not expand the default table limits.
• 4.2.6: The Si lower limit for galvanizing, or the Si upper limit for C4D–C20D, may be separately agreed at ordering.
• 4.2.8–4.2.10: By agreement, Cu≤0.20%; for C48D–C92D, Cu+Sn≤0.25% may be specified; Al of 0.01%–0.06% with Si≤0.10% may be agreed.
• 4.3: Mechanical properties of composition-designated grades are agreed between supplier and purchaser. Table 2 gives recommended within-batch tensile-strength variation, not guaranteed tensile-strength limits.
• Delivery condition, dimensions, surface, packaging and acceptance shall follow GB/T 24242.1—2020 and the order.

Reference: GB/T 24242.2-2020，Table 1 and clauses 3.2, 4.2.7. Website information does not replace the official standard, order specifications or material certificates.