1.1 This specification covers hot-worked alloy, carbon, and carbon-boron steels in a variety of compositions and sizes, which may attain specified depth of hardening in the end quench test. These steel compositions are identified by the suffix letter “H” added to the conventional grade number.
1.2 This specification provides for analyses other than those listed under Tables 1 and 2. Special hardenability limits are also permissible when approved by the purchaser and manufacturer.
1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
TABLE 2 Chemical Requirements of Carbon H-SteelsA
|
|---|
UNS DesignationB
| Grade Designation
| Chemical Composition, %
|
|---|
Carbon
| Manganese
| Phosphorus,
max
| Sulfur,
max
| Silicon
|
|---|
|
| H 10380 | 1038 H | 0.34–0.43 | 0.50–1.00 | 0.040 | 0.050 | 0.15–0.35 |
| H 10450 | 1045 H | 0.42–0.51 | 0.50–1.00 | 0.040 | 0.050 | 0.15–0.35 |
| H 15220 | 1522 H | 0.17–0.25 | 1.00–1.50 | 0.040 | 0.050 | 0.15–0.35 |
| H 15240 | 1524 H | 0.18–0.26 | 1.25–1.75 | 0.040 | 0.050 | 0.15–0.35 |
| H 15260 | 1526 H† | 0.21–0.30 | 1.00–1.50 | 0.040 | 0.050 | 0.15–0.35 |
ASTM A304-11 history- 2020 ASTM A304-20 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2016 ASTM A304-16 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2011 ASTM A304-11 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2005 ASTM A304-05(2011) Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2005 ASTM A304-05e2 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2005 ASTM A304-05e1 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2005 ASTM A304-05 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2004 ASTM A304-04 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 2002 ASTM A304-02 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
- 1996 ASTM A304-96 Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
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