DD402
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 DD402 →DD402 · GB /T 14992-2005
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Alloy steel
- Subcategory
- Special alloy steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| Ag | ≤ 0.0005 (lower limit not stated) |
| Al | 5.45 ～ 5.75 |
| As | ≤ 0.0005 (lower limit not stated) |
| B | ≤ 0.003 (lower limit not stated) |
| Bi | ≤ 3e-05 (lower limit not stated) |
| C | ≤ 0.006 (lower limit not stated) |
| Co | 4.3 ～ 4.9 |
| Cr | 7 ～ 8.2 |
| Cu | ≤ 0.05 (lower limit not stated) |
| Fe | ≤ 0.2 (lower limit not stated) |
| Ga | ≤ 0.002 (lower limit not stated) |
| Mg | ≤ 0.008 (lower limit not stated) |
| Mn | ≤ 0.02 (lower limit not stated) |
| Mo | 0.3 ～ 0.7 |
| N | ≤ 0.0012 (lower limit not stated) |
| Nb | ≤ 0.15 (lower limit not stated) |
| O | ≤ 0.001 (lower limit not stated) |
| P | ≤ 0.005 (lower limit not stated) |
| Pb | ≤ 0.0002 (lower limit not stated) |
| S | ≤ 0.002 (lower limit not stated) |
| Sb | ≤ 0.0005 (lower limit not stated) |
| Se | ≤ 0.0001 (lower limit not stated) |
| Si | ≤ 0.04 (lower limit not stated) |
| Sn | ≤ 0.0015 (lower limit not stated) |
| Ta | 5.8 ～ 6.2 |
| Ti | 0.8 ～ 1.2 |
| W | 7.6 ～ 8.4 |
| Zn | ≤ 0.0005 (lower limit not stated) |
| Zr | ≤ 0.0075 (lower limit not stated) |
Applicability and limitations
This record contains composition relationships requiring review; no cold-heading suitability or strength-class recommendation is provided to customers.
DD402 · GB /T 14992-2005
Original-source verification is incomplete; this is not a formal standard reference
- Material category
- Alloy steel
- Subcategory
- Special alloy steel
- Material form
- Reference record
- Verification status
- Reference data; original source not verified
Carbon-equivalent reference
Composition
| Element | Composition requirement |
|---|---|
| Ag | ≤ 0.0005 (lower limit not stated) |
| Al | 5.45 ～ 5.75 |
| As | ≤ 0.0005 (lower limit not stated) |
| B | ≤ 0.003 (lower limit not stated) |
| Bi | ≤ 3e-05 (lower limit not stated) |
| C | ≤ 0.006 (lower limit not stated) |
| Co | 4.3 ～ 4.9 |
| Cr | 7 ～ 8.2 |
| Cu | ≤ 0.05 (lower limit not stated) |
| Fe | ≤ 0.2 (lower limit not stated) |
| Ga | ≤ 0.002 (lower limit not stated) |
| Mg | ≤ 0.008 (lower limit not stated) |
| Mn | ≤ 0.02 (lower limit not stated) |
| Mo | 0.3 ～ 0.7 |
| N | ≤ 0.0012 (lower limit not stated) |
| Nb | ≤ 0.15 (lower limit not stated) |
| O | ≤ 0.001 (lower limit not stated) |
| P | ≤ 0.005 (lower limit not stated) |
| Pb | ≤ 0.0002 (lower limit not stated) |
| S | ≤ 0.002 (lower limit not stated) |
| Sb | ≤ 0.0005 (lower limit not stated) |
| Se | ≤ 0.0001 (lower limit not stated) |
| Si | ≤ 0.04 (lower limit not stated) |
| Sn | ≤ 0.0015 (lower limit not stated) |
| Ta | 5.8 ～ 6.2 |
| Ti | 0.8 ～ 1.2 |
| W | 7.6 ～ 8.4 |
| Zn | ≤ 0.0005 (lower limit not stated) |
| Zr | ≤ 0.0075 (lower limit not stated) |
Applicability and limitations
This record contains composition relationships requiring review; no cold-heading suitability or strength-class recommendation is provided to customers.