Claims
- 1. A high chromium heat resistant cast steel material consisting of carbon of 0.08 to 0.14%, silicon of 0.10 to 0.30%, chromium of 8 to 10%, nickel of 0.01 to 0.6%, vanadium of 0.1 to 0.2%, niobium of 0.03 to 0.06%, nitrogen of 0.02 to 0.07%, molybdenum of 0.1 to 0.7%, tungsten of 1 to 2.5% and cobalt of 0.01 to 2%, all in weight percent, and inevitable impurities and iron.
- 2. A high chromium heat resistant cast steel material consisting of carbon of 0.08 to 0.14%, silicon of 0.10 to 0.30%, chromium of 8 to 10%, nickel of 0.01 to 0.60%, vanadium of 0.1 to 0.2%, niobium of 0.03 to 0.06%, nitrogen of 0.02 to 0.07%, molybdenum of 0.1 to 0.7%, tungsten of 1 to 2.5%, cobalt of 0.01 to 2% and copper of 0.02 to 2.5%, all in weight percent, and inevitable impurities and iron.
- 3. The high chromium heat resistant cast steel material as claimed in claim 1, containing calcium at 0.001 to 0.009 weight percent.
- 4. The high chromium heat resistant cast steel material as claimed in claim 2, containing calcium at 0.001 to 0.009 weight percent.
- 5. A high chromium heat resistant cast steel material comprising carbon of 0.08 to 0.14%, silicon of 0.10 to 0.30%, manganese of 0.01 to 1.0%, chromium of 8.0 to less than 9.5%, nickel of 0.01 to 0.60%, vanadium of 0.1 to 0.2%, niobium of 0.03 to 0.06%, nitrogen of 0.02 to 0.07%, molybdenum of 0.1 to 0.7%, tungsten of 1.5 to 2.5% and cobalt of 0.01 to 2%, all in weight percent, and inevitable impurities and iron.
- 6. A high chromium heat resistant cast steel material comprising carbon of 0.08 to 0.14%, silicon of 0.10 to 0.30%, manganese of 0.10 to 1.0%, chromium of 8.0 to less than 9.5%, nickel of 0.01 to 0.60%, vanadium of 0.1 to 0.2%, niobium of 0.03 to 0.06%, nitrogen of 0.02 to 0.07%, molybdenum of 0.1 to 0.7%, tungsten of 1.5 to 2.5%, cobalt of 0.01 to 2% and copper of 0.2 to 2.5%, all in weight percent, and inevitable impurities and iron.
- 7. The high chromium heat resistant cast steel material as claimed in any of claims 1 to 6, additionally containing boron at 0.002 to 0.010 weight percent.
- 8. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 1.
- 9. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 2.
- 10. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 3.
- 11. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 4.
- 12. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 5.
- 13. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 6.
- 14. A pressure vessel formed of the high chromium heat resistant cast steel material as claimed in claim 7.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9-012675 |
Jan 1997 |
JPX |
|
9-110976 |
Apr 1997 |
JPX |
|
Parent Case Info
This is a divisional of Ser. No. 09/008,593, filed Jan. 16, 1998, now U.S. Pat. No. 6,007,767 issued Dec. 28, 1999.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5798082 |
Kadoya et al. |
Aug 1998 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
0 188 995 |
Jul 1986 |
EPX |
0 688 883 |
Dec 1995 |
EPX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, 95(11), abstract of JP 07-197208 (Aug. 1995). |
Divisions (1)
|
Number |
Date |
Country |
Parent |
008593 |
Jan 1998 |
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