SCM435-2
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 SCM435-2 →SCM435-2 · Q/BQB 517-2023
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
- Original record status
- Original standard verified
- Standard edition
- Q/BQB 517—2023
- Table / clause
- 6.1.1/Table 1, row 88, note a
- PDF page references
- 12
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
Original composition-element notation and analysis basis
- Al
- Original element symbol
- Alₜ
- Symbol extracted from the original source
- Alt
- Original table column heading
- Al t
- Subscript in the original source
- t
- Subscript explanation
- Only original table subscripts shall be retained; do not expand these into total aluminum or acid-soluble aluminum; Al without specified form shall not be directly equated
- Standard edition
- Q/BQB 517—2023
- Table / clause
- 1
- Original table item number
- 88
- PDF page references
- 12
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
- Original record status
- Original column symbol verified
- Original cell
- 0.020 ～ 0.050
When the original analysis designations differ, or a record leaves them unspecified, comparability or a match cannot be concluded directly. Subscripts not explained by the source are not expanded here.
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.33 ～ 0.38 |
| Si | ≤ 0.15 (lower limit not stated) |
| Mn | 0.6 ～ 0.85 |
| P | ≤ 0.02 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| B | ≤ 0.005 (lower limit not stated) |
| Alₜ | 0.02 ～ 0.05 |
| Cu | ≤ 0.25 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
Applicability and limitations
Q/BQB 517—2023, official original on the Baosteel website, Table 1, row 88; 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.View associated products →SCM435-2 · Q/ZNGF 01.7—2023
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
- 2023 Edition; Published 2023-09-21, implemented 2023-10-01; Supersedes Q/SG18—2022
- Document title
- Steel wire rod for cold heading and cold extrusion
- Table / clause
- Table 1
- PDF page references
- 6
- Unit
- Mass fraction (wt%)
- Manufacturer
- Guangdong Zhongnan Iron & Steel Co., Ltd.
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 | 0.33 ～ 0.38 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
Applicability and limitations
Zhongnan Steel Q/ZNGF 01.7—2023, Table 1, row 52 (PDF page 6), cast analysis wt%; footnotes, delivery process and orders must be confirmed against the corresponding edition. This does not constitute a supply commitment by Creation Group.
Composition conditions
- Table 1 heat analysis, mass fractions wt%; A dash means no limit is listed, not zero.
- Clause 6.1.4 residual impurities Cr, Ni and Cu are each ≤0.20%; Where Cr is intentionally added, the corresponding row limits apply instead of residual maxima.
- Wire rod is delivered in the hot-rolled condition; The ordinary cold-upsetting level is 1/2; high and relatively high levels must be specified in the contract.
- Table 1, footnote a: -1/-2/-3 identifies a different billet-finishing and rolling route; Its delivery condition is not identical to that of the grade without the suffix.