25MNTIBREA
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 25MNTIBREA →25MnTiBREA · GB/T 3077-2015
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Alloy steel
- Subcategory
- Alloy structural steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 3077-2015
- Table / clause
- Tables 1 and 2; A/E designation rules in the endnote to Table 1
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.22 ～ 0.28 |
| Mn | 1.3 ～ 1.6 |
| Si | 0.2 ～ 0.45 |
| B | 0.0008 ～ 0.0035 |
| Ti | 0.04 ～ 0.1 |
| P | ≤ 0.02 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Cu | ≤ 0.25 (lower limit not stated) |
| Cr | ≤ 0.3 (lower limit not stated) |
| Ni | ≤ 0.3 (lower limit not stated) |
| Mo | ≤ 0.1 (lower limit not stated) |
Applicability and limitations
Table 1 of GB/T3077-2015 is for heat analysis, and Table 2 is for P/S and residual element requirements.. ; The final note of Table 1 allows all grades to be ordered as high-grade/extra-high-grade quality steel, with A/E added after the grade respectively.; Quality level for this record: high-quality steel.. ; For steel used in hot-pressure working, Cu≤0.20%.; The general Cu upper limit cannot be applied to this purpose.. ; The alloying ranges specified in Table 1 shall take priority.; Unspecified Cr/Ni/Mo shall follow the residual upper limits in Table 2; residual upper limits shall not be superimposed on alloying elements.. ; Sn/Sb/As must be analyzed and recorded in the quality certificate, with limits by agreement when required.; No unified numerical limits shall be fabricated here. ; Product analysis deviations shall be used separately according to GB/T222 and shall not directly expand the heat range. ; Mechanical properties require consideration of specimen size and recommended heat-treatment/delivery conditions. This composition review does not establish that mechanical properties have been verified.. ; Table 1 Note a: Rare earths are added based on a calculated amount of 0.05%; product analysis results are for reference; The addition amount of 0.05% shall not be written as a guaranteed composition..