10B21（D)
1 source records. Standards, editions and conditions are presented separately; matching grade names do not establish interchangeability.
Refer to each source for mass fractions and analysis type. Missing values are not treated as 0. Manufacturer typical values, standard guarantees and measured heat results must remain separate. Use the material selector for calculations and condition selection.
Open condition selection, comparison and carbon-equivalent tools for 10B21（D) →10B21（D) · BEXG 021-2020
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Cold-heading steel
- Subcategory
- Cold-heading steel
- Material form
- Wire rod
- Original record status
- Manufacturer source verified
- Document edition
- BEXG 021-2020, sixteenth revision stated on the cover; issued and effective on 2020-12-29; The latest original document available on this computer only
- Document title
- Technical delivery conditions for cold-heading steel wire rod for automotive parts
- Table / clause
- Table 1
- PDF page references
- 6
- Unit
- Mass fraction (wt%)
- Manufacturer
- Baoshan Iron & Steel Co., Ltd. (Baosteel)
Carbon-equivalent reference
Estimate from manufacturer-published ranges, not a standard guarantee or measured heat result; formula applicability requires review against the application and process.
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | ≤ 0.1 (lower limit not stated) |
| Mn | 0.7 ～ 1.0 |
| P | ≤ 0.02 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| B | ≥ 0.0008 (upper limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Mo | ≤ 0.06 (lower limit not stated) |
Applicability and limitations
Baosteel BEXG 021-2020, Table 1, row 52, PDF page 6; heat-analysis composition in wt%, hot-rolled wire rod. 2020 is the original edition available locally, with no claim that it is the company’s current latest edition. Special conditions and actual supply require separate confirmation.
Composition conditions
- Table 1 and its continuation give heat composition, in mass fractions wt%; The product is hot-rolled wire rod for automotive parts.
- Unless expressly stated otherwise, residual Cr≤0.20%, Ni≤0.20%, Cu≤0.20% and Mo≤0.06% apply; Specific requirements in the table and additional notes take precedence.
- A dash does not mean zero; Composition outside the table is not inferred from grade names or referenced standards.