SCM420
13 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 SCM420 →SCM420 · 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
- Source edition identified; composition verification pending
- 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 | 0.18 ～ 0.23 |
| 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 ～ 0.25 |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
Composition is based on JIS G 4053-2008; the product edition is unspecified, so confirm the edition applicable under the contract.
Composition conditions
- Heat-analysis mass fractions wt%; Permissible deviations for product analysis shall follow JIS G0321 Table 4 separately; the heat analysis range cannot be directly extended.
- Residual Cu ≤ 0.30% for all grades; When Mo is unspecified, it cannot be calculated as zero.
- For SNCM630, the Mo lower limit can be reduced to 0.30% only by agreement between both parties; SACM645 shall additionally satisfy Al 0.70–1.20%.
- Whether it is suitable for specific cold-heading parts must be confirmed separately in conjunction with delivery condition, spheroidization, deformation amount, surface quality, and testing.
Verification notes
Composition is based on JIS G 4053-2008; the product edition is unspecified, so confirm the edition applicable under the contract.View associated products →SCM420 · 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 | 0.18 ～ 0.23 |
| 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 ～ 0.25 |
| 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 rowSCM420 · JIS G 4053-2016
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Reference record
- Original record status
- Historical-edition reference
- 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 | 0.18 ～ 0.23 |
| 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 ～ 0.25 |
| Cu | ≤ 0.3 (lower limit not stated) |
Applicability and limitations
The chemical composition currently shown is transcribed from the original JIS G 4053-2008; The original record cites JIS G 4053-2016; that original edition remains unavailable, and differences between editions have not been confirmed. Heat-analysis mass fractions wt%; Permissible deviations for product analysis shall follow JIS G0321 Table 4 separately; the heat analysis range cannot be directly extended. ; Residual Cu ≤ 0.30% for all grades; When Mo is unspecified, it cannot be calculated as zero. ; For SNCM630, the Mo lower limit can be reduced to 0.30% only by agreement between both parties; SACM645 shall additionally satisfy Al 0.70–1.20%. ; Whether it is suitable for specific cold-heading parts must be confirmed separately in conjunction with delivery condition, spheroidization, deformation amount, surface quality, and testing.
Verification notes
The composition currently shown is from the original JIS G 4053-2008. The source record cites JIS G 4053-2016; that original is still to be obtained, and differences between editions have not been confirmed.SCM420 · 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 | 0.18 ～ 0.23 |
| 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 checkedSCM420 · 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 83, note a
- PDF page references
- 11
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| 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 | ≤ 0.25 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
Applicability and limitations
Q/BQB 517—2023, official original on the Baosteel website, Table 1, row 83; 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.SCM420 · Q/320582 SGY503-2024 (1st edition)
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
- Edition 1 (2024); issued 2024-04-26; effective 2024-05-01
- Document title
- Hot-rolled cold-heading steel wire rod for automotive fasteners
- Table / clause
- Table 1
- PDF page references
- 6
- Unit
- Mass fraction (wt%)
- Manufacturer
- Jiangsu Shagang Group 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 | 0.15 ～ 0.35 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.015 (lower limit not stated) |
| S | ≤ 0.015 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| Mo | 0.15 ～ 0.25 |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
Applicability and limitations
Shagang Q/320582 SGY503-2024 (edition 1), Table 1, row 46 (PDF page 6), cast analysis wt%; original grades and values of this edition are shown independently. Orders and actual supply require separate confirmation; this is not a supply commitment by Creation Group.
Composition conditions
- 2024, 1st edition, Table 1: heat analysis, mass fraction wt%; a dash is not zero.
- Clause 6.1.3 residual limits: Cr≤0.20%, Ni≤0.20%, Cu≤0.20%, Mo≤0.05%; where Table 1 specifies otherwise, follow the grade entry.
- AlT is the lower limit for total aluminium; B has a separate column, and Ti, V, etc. are in notes; preserve grade suffixes exactly as printed in this edition.
- Table 2: oxygen≤30×10⁻⁶ and nitrogen≤70×10⁻⁶; these are not alloy-element fields in mass fraction wt%.
- Measured hardness and mechanical data in Clauses 6.10/6.11 are not delivery requirements; no generic properties are entered.
Verification notes
Manufacturer catalogue, 2024 edition 1: text extracted directly from the black original table and checked row by row; the blue public watermark was excluded from the extraction layer.SCM420 · 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 | 0.15 ～ 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 ～ 0.25 |
| 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 48 (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.SCM420 · 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 | 0.18 ～ 0.23 |
| 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 ～ 0.25 |
| 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.SCM420 · 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 | 0.18 ～ 0.23 |
| 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 ～ 0.25 |
| 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.
Verification notes
Merged cells in all 28 catalogue tables were reconstructed geometrically, with no missing cells. Original images, continuation pages and notes are recorded; disputed conditions are withheld.SCM420 · CNS 3229(G3063) Chromium-molybdenum steel materials for machine structural use
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Alloy steel
- Subcategory
- Alloy steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Cr | 0.9 ～ 1.2 |
| Cu | ≤ 0.3 (lower limit not stated) |
| Mn | 0.6 ～ 0.85 |
| Mo | 0.15 ～ 0.3 |
| Ni | ≤ 0.25 (lower limit not stated) |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
Applicability and limitations
A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.
SCM420 · Q/ASB 234-2018
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Alloy steel
- Subcategory
- Alloy steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Cr | 0.9 ～ 1.2 |
| Mn | 0.6 ～ 0.85 |
| Mo | 0.15 ～ 0.3 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
Applicability and limitations
A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.
SCM420 · Q/OHAB 113-2020
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Alloy steel
- Subcategory
- Alloy steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Cr | 0.9 ～ 1.2 |
| Mn | 0.6 ～ 0.9 |
| Mo | 0.15 ～ 0.25 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
Applicability and limitations
A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.
SCM420 · Japanese standard (number not stated)
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Alloy steel
- Subcategory
- Alloy steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.23 |
| Cr | 0.9 ～ 1.2 |
| Cu | ≤ 0.3 (lower limit not stated) |
| Mn | 0.6 ～ 0.9 |
| Mo | 0.15 ～ 0.25 |
| Ni | ≤ 0.25 (lower limit not stated) |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
Applicability and limitations
A match in the materials database does not establish suitability for cold heading or guarantee finished-product strength. Confirmation must consider wire condition, deformation, heat treatment and tests on actual parts.