23MNB5
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 23MNB5 →23MnB5 · ISO 4954
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Cold-heading wire
- Original record status
- Reference transcription of standard
- Standard edition
- ISO 4954:2018
- Table / clause
- Table C.3
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.2 ～ 0.26 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.1 ～ 1.4 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Cr | ≤ 0.3 (lower limit not stated) |
| B | 0.0008 ～ 0.005 |
| Cu | ≤ 0.25 (lower limit not stated) |
Applicability and limitations
ISO 4954:2018; heat analysis, mass fraction %; values without a stated range are upper limits; see the source page for complete table footnotes. The website does not specify the edition; the source edition is shown here and does not establish contractual applicability.
Verification notes
Standard source: ISO 4954:2018 · Table C.3View associated products →23MnB5 · ISO 4954-2018
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Alloy steel
- Subcategory
- Steel for quenching and tempering
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- ISO 4954:2018
- Table / clause
- Table C.3
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.2 ～ 0.26 |
| Si | ≤ 0.3 (lower limit not stated) |
| Mn | 1.1 ～ 1.4 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Cr | ≤ 0.3 (lower limit not stated) |
| B | 0.0008 ～ 0.005 |
| Cu | ≤ 0.25 (lower limit not stated) |
Applicability and limitations
ISO 4954:2018, Table C.3 gives heat analysis; A single value is a maximum; a dash is not zero. ; Product-analysis tolerances are listed separately under Table 2/3 of the standard and do not directly widen the heat-analysis composition ranges. ; Optional Al0.020–0.050% to improve cold-heading performance; this is not a universal mandatory minimum. ; Low Si may be agreed in the order, taking hardenability into account; Where hardenability is required, the standard permits limited deviations, except for P/S; C must not exceed 0.01%; see Table 2 for the other requirements. ; When a Cr maximum of 0.30% is specified, a minimum Cr may be agreed at ordering; 30MoB1 requires guaranteed hardenability, with Cr minimum 0.15% and an upper limit adjustable by agreement.