| Title of Invention | "A MARTENSITIC STAINLESS STEEL ALLOY AND THE METHOD THEREOF" |
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| Abstract | A method of making a martensitic stainless steel alloy having a unique combination of form tool machinability, hardness capabilities and corrosion resistance comprising the steps of melting an alloy consisting essentially of in weight percent Wt% Carbon 0.06-0.10 Manganese 0.50 max Silicon 0.40 max Phosphorous 0.60 max Sulfur 0.15-0.55 Chromium 12.00-12.60 Nickel 0.25 max. Molybdenum 0.10 max Aluminum 0.02 max. Copper 0.50 max. Nitrogen 0.04 max. and the balance being essentially iron. balancing the elements such that the %Chromium equivalent is not greater than 9.5% where % chromium equivalent = %Cr + %Si +1.5 x%Mo +10 x %A1 - %Ni - %Cu - 30(%C + %N); and then casting said alloy. |
| Full Text | DESCRIPTION (COMPLETE) OCR NOT PREPARE DUE TO PRINT PROBLEM We claim: 1. A martensitic stainless steel alloy having a unique combination of form tool machinability, hardness capability and corrosion resistance, said alloy consisting essentially of, in weight percent Wt% Carbon 0.06-0.10 Manganese 0.50 max Silicon 0.40 max Phosphorous 0.60 max Sulfur 0.15-0.55 Chromium 12.00-12.60 Nickel 0.25 max. Molybdenum 0.10 max Copper 0.50 max. Aluminum 0.02 max Nitrogen 0.04 max. and the balance is essentially iron wherein the elements are balanced such that the % Chromium equivalent is not greater than about 9.5% where %Chromium equivalent = %Cr+%Si +%1.5x%Mo+10x%Al-%Ni-%Cu-30(%C+%N) 2. An alloy as claimed in claim 1 containing not more than about 0.35% silicon. 3. An alloy as claimed in claim 1 containing not more than about 0.20% nickel. 4. An alloy as claimed in claim 1 containing not more than about 12.50% chromium. 5. A martensitic stainless steel alloy as claimed in claim 1 containing in weight percent of 0.15-0.50 of Sulfur, 12.00 -12.5 of chromium, 0.20 max. of nickel and 0.35 max of silicon. 6. A method of making a martensitic stainless alloy having a unique combination of form tool machinability, hardness capabilities and corrosion resistance comprising the steps of melting an alloy consisting essentially of, in weight percent Wt% Carbon 0.06-0.10 Manganese 0.50 max Silicon 0.40 max Phosphorous 0.60 max Sulfur 0.15-0.55 Chromium 12.00-12.60 Nickel 0.25 max. Molybdenum 0.10 max Copper 0.50 max. Aluminum 0.02 max Nitrogen 0.04 max. and the balance being essentially iron wherein the elements are balanced such that the % Chromium equivalent is not greater than about 9.5% where %Chromium equivalent = %Cr+%Si +1.5x%Mo+10x%Al-%Ni-%Cu-30(%C+%N) and then casting said alloy |
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in-pct-2000-00081-del-abstract.pdf
in-pct-2000-00081-del-assignment.pdf
IN-PCT-2000-00081-DEL-Claims-(03-05-2010).pdf
in-pct-2000-00081-del-claims.pdf
in-pct-2000-00081-del-complete specification (as,files).pdf
in-pct-2000-00081-del-complete specification (granted).pdf
IN-PCT-2000-00081-DEL-Correspondence-Others-(03-05-2010).pdf
in-pct-2000-00081-del-correspondence-others.pdf
in-pct-2000-00081-del-correspondence-po.pdf
in-pct-2000-00081-del-description (complete).pdf
in-pct-2000-00081-del-form-1.pdf
in-pct-2000-00081-del-form-13.pdf
in-pct-2000-00081-del-form-19.pdf
in-pct-2000-00081-del-form-2.pdf
in-pct-2000-00081-del-form-3.pdf
in-pct-2000-00081-del-form-5.pdf
in-pct-2000-00081-del-pct-101.pdf
in-pct-2000-00081-del-pct-210.pdf
in-pct-2000-00081-del-pct-304.pdf
in-pct-2000-81-del-Correspondence Others-(30-03-2012).pdf
in-pct-2000-81-del-Petition-138-(30-03-2012).pdf
| Patent Number | 244580 | ||||||||
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| Indian Patent Application Number | IN/PCT/2000/00081/DEL | ||||||||
| PG Journal Number | 51/2010 | ||||||||
| Publication Date | 17-Dec-2010 | ||||||||
| Grant Date | 10-Dec-2010 | ||||||||
| Date of Filing | 30-Jun-2000 | ||||||||
| Name of Patentee | CRS HOLDINGS INC. | ||||||||
| Applicant Address | 209F BAYNARD BUILDING, 3411 SILVERSIDE ROAD, WILMINGTON, DELAWARE 19810, USA. | ||||||||
Inventors:
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| PCT International Classification Number | C22C 38/18 | ||||||||
| PCT International Application Number | PCT/US99/00611 | ||||||||
| PCT International Filing date | 1999-01-12 | ||||||||
PCT Conventions:
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