Stainless steel
Abstract
Abstract THIS INVENTION RELATES TO A STAINLESS STEEL AND A METHOD FOR PRODUCING THE SAME, WHEREBY MATERIAL PARTICULARLY ADAPTED FOR USE IN STRUCTRUAL APPLICATIONS SUCH AS THE MANUFACTURE OF CARGO BOXES IS ACHIEVED. SPECIFICALLY, THE MATERIAL IS CHARACTERIZED BY AN IMPROVED COMBINATION OF STRENGTH AND TOUGHNESS THAT IS ACHIEVED BY PRODUCING HOTBAND MATERIAL HAVING A SUBSTANTIALLY MARTENSITC MICROSTRUCTURE OF A COMPOSITION CONSISTING OF 10 MAX. PERCENT CARBON, 2 MAX. PERCENT MANGANESE, 1 MAX. PERCENT NICKEL, 9.5 TO 13.5 PERCENT CHROMIUM, AND THE BALANCE IRON. THIS MATERIAL HAS A MAXIMUM TITANIUM TO CARBON RATIO OF ABOUT 8. WITH TITANIUM TO CARBON RATIOS OF BETWEEN 4 TO 8, NICKEL MUST BE PRESENT WITHIN THE RANGE OF 5 TO 1 PERCENT. FOR OPTIMUM WELD:TOUGHNESS THE MAXIMUM TITANIUM TO CARBON RATIO IS ABOUT 4, EITHER WITH OR WITHOUT NICKEL, TO ACHIEVE THE DESIRED COMBINATION OF STRENGTH AND TOUGHNESS, THE ,ATERIAL IN HOT-BAND GAGE IS ANNEALED FOR A TIME AT TEMPERATURE TO ACHIEVE A HARDNESS OF AT LEAST 80 RB AND PREFERABLY 82 TO 92 RB.
Inventors
- 👤 K Pinnow
- 👤 J Mehta
- 👤 A Moskowitz
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |