Chemical composition
Cast analysis, mass fraction %. Unspecified values are not zero.
| Element | Mass fraction / % |
|---|---|
| C | 0.24～0.29 |
| Si | 0.1～0.3 |
| Mn | 0.5～0.8 |
| P | ≤0.03 |
| S | ≤0.025 |
| Cr | ≤0.2 |
| Ni | ≤0.25 |
| Mo | ≤0.05 |
| Cu | ≤0.3 |
| Al | ≤0.01 |
Properties and applicable conditions
Mechanical properties for this grade are agreed between supplier and purchaser and stated in the contract. Recommended variation in Table 2 is not a tensile-strength guarantee.
Standard reference and ordering limitations
- Cast analysis; composition is expressed as mass fraction, %. An unspecified lower limit is not zero.
- 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. Website information does not replace the official standard, order specifications or material certificates.
Illustrative packaging
Product and packaging images are illustrations; they do not identify a heat, stock availability, dimensions or a default delivery method. Confirm product form, delivery condition, packaging and acceptance requirements in the enquiry and order.