ML20MNTIB
8 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 ML20MNTIB →ML20MnTiB · GB/T 5953
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Wire rod
- Original record status
- Reference transcription of standard
- Standard edition
- GB/T 6478-2015
- Table / clause
- Table 4
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al(total) | ≥ 0.02 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
Applicability and limitations
Clause 6.1.1 of GB/T5953.1/.2:2009 follows the relevant standards identified in the contract; This is reference composition for the same designation under GB/T6478; the applicable standard must be confirmed by contract, and these values are not directly treated as mandatory composition under 5953. Table 4 Footnote: The lower limit of Si may be agreed to be lower than 0.10%; The lower limit of B may be relaxed to 0.0005% if conditions are met; If acid-soluble Al is determined, use ≥0.0150%. No edition is stated on the website; Displayed under this source edition; contract applicability is not established
Verification notes
Standard source: GB/T 6478-2015 · Table 4View associated products →ML20MnTiB · GB/T 28906-2025
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Alloy steel
- Subcategory
- Boron-containing cold-heading steel for quenching and tempering
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 28906-2025
- Table / clause
- Table 4 · Footnotes; 7.1.5–7.1.7
- PDF page references
- 10、11
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Determine total aluminum Alt: 0.020–0.060%.
Determine total aluminum Alt: 0.020–0.060%.; Provided hardenability and mechanical requirements are met and both parties agree, the B minimum is 0.0005%
Determine acid-soluble aluminum Als: 0.015–0.055%.
Determine acid-soluble aluminum Als: 0.015–0.055%.; Provided hardenability and mechanical requirements are met and both parties agree, the B minimum is 0.0005%
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Sn | ≤ 0.06 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | 0.02 ～ 0.06 |
Applicability and limitations
Mass percent, heat analysis, GB/T28906-2025 Table 4. ; 7.1.5 residual Cr/Ni/Cu are each ≤0.20% and Sn≤0.06%; tabulated alloy Cr is not subject to the residual maximum; 7.1.7 product-analysis tolerances follow GB/T222 and must not be directly treated as heat-analysis limits. ; The standard scope for hot-rolled cold-heading wire rod does not replace confirmation of actual supply dimensions and the component manufacturing process; Mechanical properties require separate verification. ; When measuring acid-soluble aluminum, Als0.015–0.055% is used and is retained separately from total aluminum Alt0.020–0.060%; The Al element field must be interpreted with the selected measurement condition. ; Table 4 Note a: A Si lower limit below 0.10% may be negotiated and specified in the contract; do not fill in without agreement. ; Note b: When hardenability and mechanical properties meet requirements and upon mutual agreement, the lower limit of B may be relaxed to 0.0005%; Default 0.0008%. ; Note c: The Ti/N ratio may be agreed upon, but as no uniform value is provided in the original text, it shall not be automatically set or declared as satisfied. ; Note e: Cr may be added by agreement for the first 15 grades, with the addition amount to be confirmed by both parties.
Original condition-branch records
Determine total aluminum Alt: 0.020–0.060%.
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Sn | ≤ 0.06 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | 0.02 ～ 0.06 |
Determine total aluminum Alt: 0.020–0.060%.; Provided hardenability and mechanical requirements are met and both parties agree, the B minimum is 0.0005%
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Sn | ≤ 0.06 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0005 ～ 0.0035 |
| Al | 0.02 ～ 0.06 |
Determine acid-soluble aluminum Als: 0.015–0.055%.
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Sn | ≤ 0.06 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | 0.015 ～ 0.055 |
Determine acid-soluble aluminum Als: 0.015–0.055%.; Provided hardenability and mechanical requirements are met and both parties agree, the B minimum is 0.0005%
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Sn | ≤ 0.06 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0005 ～ 0.0035 |
| Al | 0.015 ～ 0.055 |
A condition branch must be selected
YesVerification notes
Visual check of the original composition table and footnotesML20MnTiB · GB/T 28906-2012
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Subcategory
- Boron-containing cold-heading steel for quenching and tempering
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 28906-2012
- Table / clause
- Table 4; 6.1.3/6.1.5–6.1.7
- PDF page references
- 6、7
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | ≥ 0.02 (upper limit not stated) |
Applicability and limitations
GB/T28906-2012, Table 4, heat analysis, mass percent. ; Alt in the table is total aluminum, with requirement ≥0.020% but no maximum; the 2025 maximum or acid-soluble-aluminum replacement conditions are not applied. ; 6.1.5 residual Cr/Ni/Cu are each ≤0.20%; Where Cr is a tabulated alloy range, the residual Cr maximum does not apply; Where Sn is unspecified in the original text, the Sn maximum from a newer edition is not inserted. ; 6.1.7 composition tolerances follow GB/T222; Heat-analysis limits are not treated as product-analysis tolerances. ; The standard scope covers hot-rolled cold-heading wire rod; supply conditions and the actual component process still require confirmation. ; Table 4 of 2012 does not list the relaxed B minimum or low-Si agreement in edition 2025; these conditions are not applied across editions.
Verification notes
All original table entries and related notes visually verifiedML20MnTiB · GB/T 6478-2015
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Subcategory
- Boron-containing cold-heading steel for quenching and tempering
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 6478-2015
- Table / clause
- Table 4 · Footnotes; 6.1.5–6.1.7
- PDF page references
- 9、10
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Measured total aluminium (Alt) ≥ 0.020%
Measured total aluminium (Alt) ≥ 0.020%; Provided hardenability and mechanical requirements are met, the agreed B minimum is 0.0005%
Measured acid-soluble aluminium (Als) ≥ 0.015%
Measured acid-soluble aluminium (Als) ≥ 0.015%; Provided hardenability and mechanical requirements are met, the agreed B minimum is 0.0005%
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | ≥ 0.02 (upper limit not stated) |
Applicability and limitations
GB/T6478-2015, Table 4, heat-analysis mass percentages. ; 6.1.5 residual Cr/Ni/Cu are each ≤.20%; tabulated alloy Cr is not subject to the residual Cr maximum. ; 6.1.7 product-analysis tolerances follow GB/T222 and do not widen the default heat-analysis range; Where Sn is unspecified, limits from a newer edition are not inserted. ; Specific dimensions, product condition and mechanical-property conditions require separate verification; composition alone does not establish suitability for forming a component. ; Alt is total aluminum ≥.020%; when measuring acid-soluble aluminum, Als≥.015% applies; no maximum is specified; The Al field must be interpreted according to the selected measurement basis. ; Table 4 Note a: the lower limit of Si may be agreed to be lower than .10%; the specific agreed range is unknown and shall not be filled in arbitrarily. ; Note b: when hardenability and mechanical properties meet the requirements, the B lower limit may be relaxed to .0005%; Selecting this condition does not represent that performance verification has been completed.
Original condition-branch records
Measured total aluminium (Alt) ≥ 0.020%
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | ≥ 0.02 (upper limit not stated) |
Measured total aluminium (Alt) ≥ 0.020%; Provided hardenability and mechanical requirements are met, the agreed B minimum is 0.0005%
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0005 ～ 0.0035 |
| Al | ≥ 0.02 (upper limit not stated) |
Measured acid-soluble aluminium (Als) ≥ 0.015%
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0008 ～ 0.0035 |
| Al | ≥ 0.015 (upper limit not stated) |
Measured acid-soluble aluminium (Als) ≥ 0.015%; Provided hardenability and mechanical requirements are met, the agreed B minimum is 0.0005%
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| B | 0.0005 ～ 0.0035 |
| Al | ≥ 0.015 (upper limit not stated) |
A condition branch must be selected
YesVerification notes
Visual check of all relevant ranges and footnotes in original Tables 1, 2, 4 and 5ML20MnTiB · GB/T 6478-2001
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 6478-2001
- Table / clause
- Table 4 / 6.1.4–6.1.8
- PDF page references
- 6
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Total aluminum Alt≥.020%
Acid-soluble aluminum Als≥.015%
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | 0.19 ～ 0.24 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.3 ～ 1.6 |
| B | 0.0005 ～ 0.0035 |
| Al | ≥ 0.02 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
Applicability and limitations
GB/T6478-2001, Table 4, heat analysis wt%; 6.1.4 residual Cr/Ni/Cu are each ≤.20%; alloy Cr ranges are not subject to the residual maximum. ; 6.1.8 product-analysis tolerances require separate verification under GB/T222-1984, Table 2, and do not widen the default heat-analysis range. ; Actual 2001 edition; Composition from editions 2015 or 2025 is not substituted for this edition; specific dimensions and delivery mechanical properties require separate verification. ; Table 4 total aluminum Alt≥.020%; An acid-soluble aluminum determination satisfying Als≥.015% is also acceptable; Default B in this edition is .0005–.0035%.
Original condition-branch records
Total aluminum Alt≥.020%
| Element | Composition requirement |
|---|---|
| C | 0.19 ～ 0.24 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.3 ～ 1.6 |
| B | 0.0005 ～ 0.0035 |
| Al | ≥ 0.02 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
Acid-soluble aluminum Als≥.015%
| Element | Composition requirement |
|---|---|
| C | 0.19 ～ 0.24 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.3 ～ 1.6 |
| B | 0.0005 ～ 0.0035 |
| Al | ≥ 0.015 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.035 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
A condition branch must be selected
YesVerification notes
Visual check of four composition tables and clauses on pages 5 and 6 of the original PDFML20MnTiB · 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 98, 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
- 98
- PDF page references
- 12
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
- Original record status
- Original column symbol verified
- Original cell
- ≥ 0.020
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 | 0.19 ～ 0.24 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.3 ～ 1.6 |
| P | ≤ 0.02 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| B | 0.0005 ～ 0.0035 |
| Alₜ | ≥ 0.02 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
| 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 98; 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.ML20MnTiB · 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 | 0.18 ～ 0.23 |
| Si | 0.1 ～ 0.3 |
| Mn | 1.3 ～ 1.6 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Al | ≥ 0.02 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
| B | 0.0008 ～ 0.0035 |
| Cr | ≤ 0.2 (lower limit not stated) |
| 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 57 (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.
Verification notes
2023 edition: all 69 rows of Table 1 and notes a/b/c checked line by line; process suffixes -1/-2/-3 distinguished from footnote letters.ML20MnTiB · 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
- 7
- 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 | 0.19 ～ 0.24 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.3 ～ 1.6 |
| P | ≤ 0.02 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Al | ≥ 0.02 (upper limit not stated) |
| Ti | 0.04 ～ 0.1 |
| B | 0.0008 ～ 0.0035 |
| 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 59, PDF page 7; 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.