SCM430
6 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 SCM430 →SCM430 · JIS G4053
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
- JIS G 4053:2008
- Table / clause
- Table 2
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.28 ～ 0.33 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
JIS G 4053:2008; Heat analysis, mass percent; See the original page for table notes and applicability conditions. Cu≤0.30%; Al for SACM645 follows the continued table. No edition is stated on the website; Displayed under this source edition; contract applicability is not established
Verification notes
Standard source: JIS G 4053:2008 · Table 2View associated products →SCM430 · JIS G 4053-2008
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
- JIS G 4053-2008
- Table / clause
- Table 2 · continued table · Notes a/b; Clause 5
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.28 ～ 0.33 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
Heat analysis, mass percent (wt%); product analysis tolerances are specified separately in JIS G 0321 Table 4 and must not be used to widen the heat-analysis ranges. Residual Cu ≤0.30% for all grades; an unspecified Mo value must not be treated as zero. For SNCM630, the Mo lower limit may be reduced to 0.30% only by agreement between both parties; SACM645 must separately meet Al 0.70–1.20%. Suitability for a specific cold-heading part must be confirmed separately against delivery condition, spheroidization, deformation, surface quality and testing.
Verification notes
The 2008 Japanese original Table 2 and footnotes were checked row by rowSCM430 · JIS G 4105-1979
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
- JIS G 4105-1979
- Table / clause
- Table 2 and remark 1/2; Former symbol in Table 1
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.28 ～ 0.33 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.85 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
Japanese excerpt Clause 4 Table 2 heat analysis, mass fraction %. ; Note 1 Ni impurity ≤0.25%, Cu ≤0.30%. ; Note 2 When the purchaser requires product analysis, the permissible deviation shall be according to JIS G0321 Table 3; This record does not treat heat-analysis limits as product-analysis tolerances.. ; The source document is a standard excerpt; manufacturing, geometry, testing, and inspection refer to JIS G4102; clauses not seen shall not be regarded as verified. ; Old symbols in Table 1 serve only as historical search aliases and shall not be regarded as unconditionally interchangeable between different standards. ; Standard for chromium molybdenum steel for machinery structural use; specific delivery condition for cold heading and suitability for parts shall be confirmed separately.
Verification notes
All 10 grades and remarks in Japanese excerpt Table 2 were visually checkedSCM430 · 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 85, note a
- PDF page references
- 12
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.31 ～ 0.35 |
| Si | 0.15 ～ 0.35 |
| 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 ～ 0.35 |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
Applicability and limitations
Q/BQB 517—2023, official original on the Baosteel website, Table 1, row 85; 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.SCM430 · Nippon Steel Wire Rods EXE203 2008.3 / JIS G4053-2003
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Alloy steel
- Subcategory
- Alloy steel
- Material form
- Wire rod
- Original record status
- Manufacturer source verified
- Document edition
- Cat. No. EXE203 2008.3 PDF; cover copyright 2008
- Document title
- Nippon Steel Wire Rods
- Table / clause
- Printed page 17, table index 2
- PDF page references
- 10
- Unit
- Mass fraction (%)
- Analysis type
- The original catalogue does not explicitly identify the analysis type for this table
- Manufacturer
- NIPPON 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 | 0.28 ～ 0.33 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
Nippon Steel wire-rod catalogue EXE203 2008.3, historical material; PDF p. 10
printed p. 17; JIS G4053-2003. The original catalogue does not specify the analysis type for this table. Manufacturer range data; not a standard guarantee or a heat-lot test, and does not represent our supply.
Composition conditions
- Original catalogue mass percentages, historical manufacturer data from 2008.3; Referenced standard names and editions follow the original document; this does not establish that the official texts of those standards have been obtained and verified.
- A dash or blank must not be treated as 0; only chemical composition has been checked in this batch. Mechanical properties and actual supply require separate verification under the applicable conditions.
Verification notes
Grouped tables were expanded in full and checked against original images and notes. Ordinary, residual and conditional elements are kept separate; suffix tables lacking complete base-steel composition are excluded.SCM430 · CHINA STEEL CORPORATION · Bars and Wire Rods Product Catalogue 2014-C1 / 7.1.11 JIS G4053 (Edition unspecified)
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Alloy steel
- Subcategory
- Alloy steel
- 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
- 7.1.11 JIS G4053 (Edition unspecified)
- PDF page references
- 20
- 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 | 0.28 ～ 0.33 |
| Si | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.3 |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
CSC bars and wire rods catalogue CAT.NO.3-BD-01-2014-C1, PDF page 20
printed page 18; clause 7.1.11 cites JIS G4053 (edition not stated). The original catalogue does not specify the analysis type for this table. Historical manufacturer scope data; neither standard guaranteed values nor measured heat analysis, and not evidence of supply by our company.
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.