10B38
2 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 10B38 →10B38 · Q/BQB 517-2023
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Alloy steel
- Subcategory
- Cold-heading steel
- Material form
- Hot-rolled steel wire rod for cold heading
- Original record status
- Original standard verified
- Standard edition
- Q/BQB 517—2023
- Table / clause
- 6.1.1/Table 1, row 65, note a
- PDF page references
- 11
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.35 ～ 0.42 |
| Si | ≤ 0.1 (lower limit not stated) |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.02 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| B | 0.0008 ～ 0.005 |
| 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
Q/BQB 517—2023, official original on the Baosteel website, Table 1, row 65; cast-analysis mass fraction wt%. Table footnote a: residual Cr≤0.20, Ni≤0.20, Cu≤0.20, Mo≤0.06 wt%; where this row specifies otherwise, its requirement for that element takes precedence. Unlisted elements and special agreement requirements must not be treated as zero or assumed guarantees; permitted product-analysis deviations are governed separately by GB/T 222. Wire rod is delivered hot rolled; stricter P/S under Z1 and special surface or inclusion quality must be confirmed under normative Annex A and the contractual ordering codes. Fixed mechanical properties must not be inferred from the chemistry table.
Verification notes
All 104 rows of Table 1 and 34 rows of Table 2 in the original Q/BQB517:2023 from Baosteel’s official website were checked row by row; not mixed with older editions.10B38 · CHINA STEEL CORPORATION · Bars and Wire Rods Product Catalogue 2014-C1 / 7.1.2 Carbon-boron steels / chromium-vanadium-boron steels
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Boron steels
- Subcategory
- Boron steels
- Material form
- Bars and wire rod
- Original record status
- Manufacturer source verified
- Document edition
- CAT.NO.3-BD-01-2014-C1 (stated on the back cover)
- Document title
- Bars and Wire Rods Product Catalogue
- Table / clause
- 7.1.2 Carbon-boron steels / chromium-vanadium-boron steels
- PDF page references
- 13
- Unit
- Mass fraction (%)
- Analysis type
- The original catalogue does not explicitly identify the analysis type for this table
- Manufacturer
- CHINA STEEL CORPORATION
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 | 0.35 ～ 0.42 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.7 ～ 1.0 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| B | ≥ 0.0005 (upper limit not stated) |
Applicability and limitations
China Steel bar and wire-rod catalogue CAT.NO.3-BD-01-2014-C1, PDF page 13
printed page 11, 7.1.2 China Steel carbon-boron
chromium-vanadium-boron steels. The original catalogue does not explicitly identify the analysis type for this table. Historical manufacturer range data, not guaranteed standard limits or heat-specific measurements; this does not establish supply by Creation Group.
Composition conditions
- Historical manufacturer 2014-C1 catalogue, bars/wire rod; Where the referenced standard edition is not identified, a year is not borrowed from another catalogue; a catalogue is not upgraded to the official standard text.
- A dash or blank must not be treated as zero. Composition data do not establish completeness or applicability of a formula; mechanical properties and supply require separate verification.