A322 50B50
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 A322 50B50 →A322 50B50 · ASTM A322-1991(R2001)e1
Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results
- Material form
- Reference record
- Original record status
- Original standard verified
- Standard edition
- ASTM A322-1991(R2001)e1
- Table / clause
- Table 1 · Notes A–G
- PDF page references
- 1、2、3
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Table 1 default Si .15–.35%; Usual Ti addition; B .0005–.003%
Table 1 default Si .15–.35%; Usual Ti addition not permitted; B upper limit may reach .005%
Purchaser specifies Si≤.10%; Usual Ti addition; B .0005–.003%
Purchaser specifies Si≤.10%; Usual Ti addition not permitted; B upper limit may reach .005%
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | 0.48 ～ 0.53 |
| Mn | 0.75 ～ 1.0 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.4 ～ 0.6 |
| Mo | ≤ 0.06 (lower limit not stated) |
| Cu | ≤ 0.35 (lower limit not stated) |
| B | 0.0005 ～ 0.003 |
Applicability and limitations
Original header A322–91(Reapproved2001)e1; note e1 records correction of Table 1 in year 2004, month 5. The full edition is retained, not represented as 2013/2024. Cast analysis wt%. Note A gives maximum incidental contents for elements not otherwise specified or required: Cu≤.35/Ni≤.25/Cr≤.20/Mo≤.06; explicitly specified alloy ranges take priority. Note F: the purchaser may specify Si≤.10%, usually for severely cold-formed parts; default Si .15–.35%. Select the two conditions separately; this does not establish cold-heading supply availability. Note B: adding Pb .15–.35% requires L identification; not included in ordinary grades. This standard covers hot-worked alloy steel bars; coiled dimensions and applicability require supplier confirmation. Product deviations and other composition agreements referring to A29 require separate verification. Original-table UNS G50501; grade column 50B50. Note G specifies intended boron content: usually .0005–.003%, up to .005% when the usual Ti addition is not permitted. This is not unrestricted widening; conditions remain separate.
Original condition-branch records
Table 1 default Si .15–.35%; Usual Ti addition; B .0005–.003%
| Element | Composition requirement |
|---|---|
| C | 0.48 ～ 0.53 |
| Mn | 0.75 ～ 1.0 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.4 ～ 0.6 |
| Mo | ≤ 0.06 (lower limit not stated) |
| Cu | ≤ 0.35 (lower limit not stated) |
| B | 0.0005 ～ 0.003 |
Table 1 default Si .15–.35%; Usual Ti addition not permitted; B upper limit may reach .005%
| Element | Composition requirement |
|---|---|
| C | 0.48 ～ 0.53 |
| Mn | 0.75 ～ 1.0 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | 0.15 ～ 0.35 |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.4 ～ 0.6 |
| Mo | ≤ 0.06 (lower limit not stated) |
| Cu | ≤ 0.35 (lower limit not stated) |
| B | 0.0005 ～ 0.005 |
Purchaser specifies Si≤.10%; Usual Ti addition; B .0005–.003%
| Element | Composition requirement |
|---|---|
| C | 0.48 ～ 0.53 |
| Mn | 0.75 ～ 1.0 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | ≤ 0.1 (lower limit not stated) |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.4 ～ 0.6 |
| Mo | ≤ 0.06 (lower limit not stated) |
| Cu | ≤ 0.35 (lower limit not stated) |
| B | 0.0005 ～ 0.003 |
Purchaser specifies Si≤.10%; Usual Ti addition not permitted; B upper limit may reach .005%
| Element | Composition requirement |
|---|---|
| C | 0.48 ～ 0.53 |
| Mn | 0.75 ～ 1.0 |
| P | ≤ 0.035 (lower limit not stated) |
| S | ≤ 0.04 (lower limit not stated) |
| Si | ≤ 0.1 (lower limit not stated) |
| Ni | ≤ 0.25 (lower limit not stated) |
| Cr | 0.4 ～ 0.6 |
| Mo | ≤ 0.06 (lower limit not stated) |
| Cu | ≤ 0.35 (lower limit not stated) |
| B | 0.0005 ～ 0.005 |