20CR4+H
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 20CR4+H →20Cr4+H · ASTM A534-2017
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 A534-2017
- Table / clause
- Table1 and note A/B/C/D; 5.1–5.3
- PDF page references
- 1、2
Carbon-equivalent reference
Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.
Heat analysis (oxygen limit not applicable)
Product oxygen requirement; Product-analysis tolerances for other elements require separate verification
Composition record (conditional branches apply; this is not an unconditional requirement)
| Element | Composition requirement |
|---|---|
| C | 0.17 ～ 0.23 |
| Mn | 0.6 ～ 0.9 |
| Si | ≤ 0.4 (lower limit not stated) |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.015 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
| Al | ≤ 0.05 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
Applicability and limitations
Table 1 gives example grades of case-hardening bearing steel; Clause 5.1 permits other compositions to be specified.; 5.2 Acceptance shall be based on the table values of the ordered grade or agreement between both parties. ; Heat analysis wt%; Table 1, Note D: Oxygen≤.0020% applies only to product analysis; no oxygen limit is shown in the default heat-analysis group.. ; The product-analysis group adds only the oxygen requirement in the original table.; Product-analysis tolerances for other elements require separate verification under A29/A29M; the heat-analysis limits have not been automatically expanded.. ; Note B: Calcium/calcium alloys shall not be intentionally added for deoxidation or inclusion morphology control without explicit approval from the purchaser. ; Note C: These ISO grades correspond to ISO683 Part 17 Third Edition Table 3/5; Only actual ASTM table values are verified in this round; +H is retained, and hardenability is not claimed to have been tested and qualified. ; Do not enter zero for elements shown as unspecified by a dash.; Use for case-hardened bearings does not establish availability as cold-heading wire..
Original condition-branch records
Heat analysis (oxygen limit not applicable)
| Element | Composition requirement |
|---|---|
| C | 0.17 ～ 0.23 |
| Mn | 0.6 ～ 0.9 |
| Si | ≤ 0.4 (lower limit not stated) |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.015 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
| Al | ≤ 0.05 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
Product oxygen requirement; Product-analysis tolerances for other elements require separate verification
| Element | Composition requirement |
|---|---|
| C | 0.17 ～ 0.23 |
| Mn | 0.6 ～ 0.9 |
| Si | ≤ 0.4 (lower limit not stated) |
| P | ≤ 0.025 (lower limit not stated) |
| S | ≤ 0.015 (lower limit not stated) |
| Cu | ≤ 0.3 (lower limit not stated) |
| Al | ≤ 0.05 (lower limit not stated) |
| Cr | 0.9 ～ 1.2 |
| O | ≤ 0.002 (lower limit not stated) |