21CR12MOV
3 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 21CR12MOV →21Cr12MoV · GB /T 20878-2007
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Stainless steel
- Subcategory
- Martensitic stainless and heat-resistant steels
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 20878—2007
- Table / clause
- Table 4, No. 121
- PDF page references
- 15
- Unit
- Mass fraction (wt%)
- Analysis type
- Standard composition requirements
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.24 |
| Si | 0.1 ～ 0.5 |
| Mn | 0.3 ～ 0.8 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Ni | 0.3 ～ 0.6 |
| Cr | 11 ～ 12.5 |
| Mo | 0.8 ～ 1.2 |
| Cu | ≤ 0.3 (lower limit not stated) |
| V | 0.25 ～ 0.35 |
Applicability and limitations
Original GB/T 20878—2007 chemical composition, mass fraction wt%; parenthesized values are maximum permitted additions. This standard does not guarantee cold-heading suitability or actual supply. GB/T 20878—2007 is a historical edition; this record does not replace the current standard, contract, or verification of material suitability.
Verification notes
GB/T 20878—2007 historical original, Table 4, entry 121. The complete 45-page scan was checked. The standard is withdrawn; the historical edition’s application limits are retained.21Cr12MoV · GB /T 8732-2014
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Stainless steel
- Subcategory
- Martensitic stainless steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.18 ～ 0.24 |
| Cr | 11 ～ 12.5 |
| Cu | ≤ 0.3 (lower limit not stated) |
| Mn | 0.3 ～ 0.8 |
| Mo | 0.8 ～ 1.2 |
| Ni | 0.3 ～ 0.8 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.02 (lower limit not stated) |
| Si | 0.1 ～ 0.5 |
| V | 0.25 ～ 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.
21Cr12MoV · DL /T 439-2018
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Stainless 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 ～ 0.24 |
| Cr | 11 ～ 12.5 |
| Cu | ≤ 0.25 (lower limit not stated) |
| Mn | 0.3 ～ 0.8 |
| Mo | 0.8 ～ 1.2 |
| Ni | 0.3 ～ 0.6 |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.025 (lower limit not stated) |
| Si | ≤ 0.5 (lower limit not stated) |
| V | 0.25 ～ 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.