A955 GRADE 550
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 A955 GRADE 550 →A955 Grade 550 · ASTM A955/A955M-2020(c)
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material category
- Stainless steel
- Subcategory
- Duplex stainless steel
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- ASTM A955/A955M-2020(c)
- Table / clause
- Table 2 notes A–E; clauses 1.2,1.6,4.1.3/4.1.6,6.1
- PDF page references
- 1、3、4
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| C | ≤ 0.04 (lower limit not stated) |
| Mn | 4.0 ～ 6.0 |
| P | ≤ 0.04 (lower limit not stated) |
| S | ≤ 0.03 (lower limit not stated) |
| Si | ≤ 1.0 (lower limit not stated) |
| Cr | 21.0 ～ 22.0 |
| Ni | 1.35 ～ 1.7 |
| Mo | 0.1 ～ 0.8 |
| N | 0.2 ～ 0.25 |
| Cu | 0.1 ～ 0.8 |
Applicability and limitations
Alloy recorded in this composition: S32101. Table 2 gives heat-analysis composition as mass fraction wt%; values without a specified range are maxima.; Ellipses indicate no requirement; do not supplement with zero.. ; UNS alloy types and Grade strength levels shall be recorded separately; 60/75/80 refer to the ksi system, and 420/520/550 refer to the MPa system; alloys shall not be guessed based on strength levels.. ; The name 2205 may correspond to S31803 or S32205; they shall be used separately according to the confirmed UNS, and the two composition ranges shall not be mixed. ; This standard is for concrete reinforcing steel; Do not automatically treat this as a cold-heading product available for supply..