ML45MN
1 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 ML45MN →ML45Mn · GB/T 28906-2012
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Subcategory
- 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 3; 6.1.5–6.1.7
- PDF page references
- 6、7
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.43 ～ 0.48 |
| Si | 0.1 ～ 0.25 |
| Mn | 0.6 ～ 0.9 |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Cr | ≤ 0.2 (lower limit not stated) |
| Ni | ≤ 0.2 (lower limit not stated) |
| Cu | ≤ 0.2 (lower limit not stated) |
Applicability and limitations
Table 3 Heat analysis, mass fraction %. ; 6.1.5 residual Cr/Ni/Cu are each ≤0.20%; Listed alloy Cr is not subject to residual Cr limits. ; 6.1.7 composition tolerances follow GB/T222; Do not treat heat analysis limits as product analysis tolerances. ; Table 3 of the 2012 edition does not have the optional aluminum and low silicon footnotes of the 2025 edition; new edition conditions shall not be applied. ; Clause 6.4.2: Steel types intended for quenching and tempering normally do not require mechanical-property testing.; If requested by the purchaser, agree the property values for the hot-rolled condition or heat-treated test specimens and state them in the contract; do not invent uniform guaranteed values..