22CR21NI12N
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 22CR21NI12N →22Cr21Ni12N · 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
- Austenitic stainless and heat-resistant steels
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 20878—2007
- Table / clause
- Table 1, No. 30
- PDF page references
- 7
- Unit
- Mass fraction (wt%)
- Analysis type
- Standard composition requirements
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.15 ～ 0.28 |
| Si | 0.75 ～ 1.25 |
| Mn | 1 ～ 1.6 |
| P | ≤ 0.04 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Ni | 10.5 ～ 12.5 |
| Cr | 20 ～ 22 |
| N | 0.15 ～ 0.3 |
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 1, entry 30. The complete 45-page scan was checked. The standard is withdrawn; the historical edition’s application limits are retained.22Cr21Ni12N · GB/T 1221-2007
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Heat-resistant steels
- Subcategory
- Austenitic heat-resistant steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 1221-2007
- Table / clause
- Table 4 · Notes; 7.1
- PDF page references
- 6、7、8
- Unit
- Mass fraction (wt%)
- Analysis type
- Heat analysis, not product analysis
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | 0.15 ～ 0.28 |
| Si | 0.75 ～ 1.25 |
| Mn | 1 ～ 1.6 |
| P | ≤ 0.04 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Ni | 10.5 ～ 12.5 |
| Cr | 20 ～ 22 |
| N | 0.15 ～ 0.3 |
Applicability and limitations
GB/T1221—2007, Table 4, heat-analysis mass fractions wt%; The actual 2007 edition is retained separately. Standard for heat-resistant steel bars; A chemistry match does not guarantee supply of cold-heading wire, heat-treatment condition, mechanical properties or heat resistance. Under the table note, values other than explicit ranges and minima are maxima; A dash indicates unspecified content and is not entered as 0. 7.1.2 product chemical-analysis tolerances require separate verification under GB/T222 and do not directly widen heat-analysis limits. This record retains the heat-resistant-steel category in the original table; applicability of conventional welding carbon-equivalent formulas has not been independently verified, so no automatic calculation is provided.