022CR25NI7MO4WCUN
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 022CR25NI7MO4WCUN →022Cr25Ni7Mo4WCuN · 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-ferritic duplex stainless steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- GB/T 20878—2007
- Table / clause
- Table 2, No. 77
- PDF page references
- 10
- Unit
- Mass fraction (wt%)
- Analysis type
- Standard composition requirements
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | ≤ 0.03 (lower limit not stated) |
| Si | ≤ 1 (lower limit not stated) |
| Mn | ≤ 1 (lower limit not stated) |
| P | ≤ 0.03 (lower limit not stated) |
| S | ≤ 0.01 (lower limit not stated) |
| Ni | 6 ～ 8 |
| Cr | 24 ～ 26 |
| Mo | 3 ～ 4 |
| Cu | 0.5 ～ 1 |
| N | 0.2 ～ 0.3 |
| W | 0.5 ～ 1 |
Applicability and limitations
Original GB/T 20878—2007 composition, mass fractions wt%; Values in parentheses are maximum permitted additions. There is an additional combined condition, Cr+3.3Mo+16N ≥40, requiring manual review. This standard does not guarantee cold-heading suitability or actual supply. GB/T 20878—2007 is a historical edition; This record does not replace verification of the current standard, contract or material applicability.
Combined limits
- Combined-element limits
- Element coefficient
- Cr
- 1
- Mo
- 3.3
- N
- 16
- Requirement
- Cr+3.3Mo+16N≥40
- Lower limit
- 40