| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 420056000 | Eight percent or more total nickel plus manganese containing | 16 |
| 20080199345 | Austenitic Lightweight Steel and Use Thereof - Austenitic lightweight steel with a characteristic value of the cold formability higher than 30,000 MPa %, with tensile strengths between 600 and 800 MPa, and fracture strains over 50% has a chromium content of >2.0%<18%, a silicon content of >1.0%<4%, a manganese content of >2.0%<20%, an aluminum content of >0.05%<4%, wherein the steel is within an alloying range determined by | 08-21-2008 |
| 20080310990 | Stainless Steel Pipe Having Excellent Expandability for Oil Country Tubular Goods - There is provided a cost-effective stainless steel pipe having excellent expandability for oil country tubular goods, the stainless steel pipe having excellent CO | 12-18-2008 |
| 420057000 | Molybdenum or tungsten containing | 9 |
| 20130039802 | LOW-NICKEL AUSTENITIC STAINLESS STEEL AND USE OF THE STEEL - The invention relates to a low-nickel austenitic stainless steel with high resistance to delayed cracking and the use of the steel. The steel contains in weight % 0.02-0.15% carbon, 7-15% manganese, 14-19% chromium, 0.1-4% nickel, 0.1-3% copper, 0.05-0.3% nitrogen, the balance of the steel being iron and inevitable impurities, and the chemical composition range in terms of the sum of carbon and nitrogen contents (C+N) and the measured Md3o-temperature is inside the area defined by the points ABCD which have the following values Point M | 02-14-2013 |
| 20100119403 | Austenitic Stainless Steel for Cold Working Suitable For Later Machining - Austenitic stainless steel for cold working suitable for later machining, characterized by the following composition by weight:
| 05-13-2010 |
| 20080213120 | Martensitic Stainless Steel - Martensitic stainless steel according to the invention contains, by mass, 0.001% to 0.01% C, at most 0.5% Si, 0.1% to 3.0% Mn, at most 0.04% P, at most 0.01% S, 10% to 15% Cr, 4% to 8% Ni, 2.8% to 5.0% Mo, 0.001% to 0.10% Al, at most 0.07% N, 0% to 0.25% Ti, 0% to 0.25% V, 0% to 0.25% Nb, 0% to 0.25% Zr, 0% to 1.0% Cu, 0% to 0.005% Ca, 0% to 0.005% Mg, 0% to 0.005% La, and 0% to 0.005% Ce, with the balance being Fe and impurities, and the steel satisfies Expressions (1) and (2) and has a yield stress in the range from 758 MPa to 860 MPa. In this way, in the martensitic stainless steel according to the invention, the tempering temperature range at which a yield stress in the range from 758 MPa to 860 MPa can be obtained is increased. | 09-04-2008 |
| 20080206088 | Austenitic Stainless Steel - A new austenitic stainless steel with the following composition by weight is described: 0.03%| 08-28-2008 | |
| 20090060775 | Cr-Mn-N austenitic stainless steel - A Cr—Mn—N austenitic stainless steel, in which moderate manganese (Mn) and nitrogen (N) are essentially substituted for the costly nickel to produce a novel Cr—Mn—N steel, is provided, whereby reducing the cost of materials while maintaining the original physical and mechanical properties. The composition thereof includes by weight: 0.005% to 0.08% carbon, 0.3% to 0.9% silicon, 12.1% to 14.8% manganese, 0.001% to 0.04% phosphorus, 0.001% to 0.03% sulfur, 16% to 19% chromium, 0.5% to 1.8% nickel, 0.2% to 0.45% nitrogen, 0.001% to 0.3% molybdenum, 0.001% to 0.3% copper, and trace elements unavoidable in most manufacturing processes. | 03-05-2009 |
| 20100189589 | SPORTS GEAR APPARATUS MADE FROM CR-MN-N AUSTENITIC STAINLESS STEEL - A Cr—Mn—N austenitic stainless steel, in which moderate manganese (Mn) and nitrogen (N) are essentially substituted for the costly nickel to produce a novel Cr—Mn—N steel, is provided, whereby reducing the cost of materials while maintaining the original physical and mechanical properties. The composition thereof includes by weight: 0.005% to 0.08% carbon, 0.3% to 0.9% silicon, 12.1% to 14.8% manganese, 0.001% to 0.04% phosphorus, 0.001% to 0.03% sulfur, 16% to 19% chromium, 0.001% to <0.82% nickel, 0.2% to 0.45% nitrogen, 0.001% to 0.3% molybdenum, 0.001% to 0.3% copper, 0.001% to 1.0% niobium by weight; 0.001% to 0.5% titanium by weight; and trace elements unavoidable in most manufacturing processes. | 07-29-2010 |
| 20110064601 | STAINLESS STEEL PRODUCT, USE OF THE PRODUCT AND METHOD OF ITS MANUFACTURE - The invention relates to a stainless steel product, particularly to a duplex stainless steel casting with high machinability, to the use of the product and to the method to produce the product. The product contains in weight percent up to 0.07% carbon, up to 2% silicon, 3-8% manganese, 19-23% chromium, 0.5-1.7% nickel, up to 1% of molybdenum and/or tungsten with the formula (Mo+½W) less than 1%, up to 1% copper and 0.15-0.30% nitrogen, the remainder being iron and incidental impurities. | 03-17-2011 |
| 20120014829 | AUSTENITIC PARAMAGNETIC CORROSION RESISTANT MATERIAL - The alloys of the present invention provide austenitic, paramagnetic materials with high strength, ductility, and yield strength and good corrosion resistance in media with high chloride concentrations. Alloys of the present invention were developed because of the need by oilfield industries for superior materials. The alloys of the present invention may be used in drilling string components, and the tests performed demonstrate that such alloys exhibit properties balanced for very high yield strength, magnetic permeability, and corrosion resistance superior in every respect to presently available paramagnetic, high strength, corrosion resistant austenitic stainless steels. | 01-19-2012 |
| 20120156085 | Blast Resistant, Non-Magnetic, Stainless Steel Armor - An article of manufacture formed of an alloy having the following weight percent composition is described. | 06-21-2012 |
| 420058000 | Copper containing | 4 |
| 20090041613 | Ni-reduced austenite stainless steel - Provided is an Ni-reduced austenite stainless steel having excellent recyclability with no problem of producibility depression to be caused by the surface property thereof and having good workability, season cracking resistance, corrosion resistance and stress corrosion cracking resistance in point of the material characteristics thereof. The steel comprises C in an amount of more than 0.05% (by mass) and within a range of from 0.15 to 0.3% as (C+N), Si in an amount of at most 1%, Mn in an amount of from 0.5 to 2.5%, Ni in an amount of from 3 to 6%, Cr in an amount of from more than 16 to 25% and Cu in an amount of from 0.8 to 4%, and has Md30 of the following formula (1) of from −50 to 10 and SFE of the following formula (2) of at least 5: | 02-12-2009 |
| 20090022617 | LOW-NICKEL AUSTENITIC STAINLESS STEEL AND METHOD FOR PRODUCING SAME - A low-nickel austenitic stainless steel is provided which comprises by weight: ≦0.08% C, 4.0˜5.0% Mn, 0.7˜1.0% Si, 3.5˜4.5% Ni, 16.0˜18.0% Cr, 3.0˜3.50% Cu, ≦0.045% S, ≦0.030% P, impurity elements in the total amount of ≦0.2%, and Fe as the balance. This low-nickel austenitic stainless steel has decreased nickel content, but retains excellent mechanical properties and corrosion resistance property. Therefore, the cost for producing the stainless steel can be reduced remarkably. The method for producing the low-nickel austenitic stainless steel is also provided. | 01-22-2009 |
| 20090162239 | Martensitic stainless steel - The martensitic stainless steel according to the invention includes, in percent by mass, 0.010% to 0.030% C, 0.30% to 0.60% Mn, at most 0.040% P, at most 0.0100% S, 10.00% to 15.00% Cr, 2.50% to 8.00% Ni, 1.00% to 5.00% Mo, 0.050% to 0.250% Ti, at most 0.25% V, at most 0.07% N, and at least one of at most 0.50% Si and at most 0.10% Al, the balance consists of Fe and impurities, and the martensitic stainless steel satisfies Expression (1) and has a yield stress in the range from 758 MPa to 862 MPa. In this way, the martensitic stainless steel has a yield stress of 110 ksi grade (a yield stress in the range from 758 MPa to 862 MPa) and the value produced by subtracting the yield stress from the tensile stress is not less than 20.7 MPa. | 06-25-2009 |
| 20100233015 | Stainless Steel Sheet for Structural Components Excellent in Impact Absorption Property - This invention provides a steel sheet for structural components excellent in impact absorption property comprising, in mass %, C: 0.005 to 0.05%, N: 0.01 to 0.30%, Si: 0.1 to 2%, Mn: 0.1 to 15%, Ni: 0.5 to 8%, Cu: 0.1 to 5%, Cr: 11 to 20%, Al: 0.01 to 0.5%, and a balance of Fe and unavoidable impurities, wherein Md | 09-16-2010 |
| 420059000 | Over 0.20 percent nitrogen containing | 1 |
| 20100150771 | AUSTENITIC SERIES STAINLESS STEEL AND RELEVANT CASTING METHOD - An austenitic series stainless steel and relevant casting method mainly comprises procedures of a preparation, a heat, a refinement, and a formation; wherein the present method mainly applies cheap scraps of stainless steels with about 13 to 18 wt % chromium basic to the manufacture. Further, the element manganese is used to substitute nickel and thence the proportion of nitrogen is increased while manufacturing. Accordingly, a component of the austenitic stainless steel of the present invention contains less than 0.08 wt % carbon, less than 0.9 wt % silicon, about 13 to 19 wt % manganese, less than 0.04 wt % phosphorus, less than 0.04 wt % sulfur, about 13 to 18 wt % chromium, less than 0.1 wt % nickel, less than 0.8 wt % nitrogen, and essentially iron and residuals. Such inclusion assists the austenitic stainless steel to attain same properties of preferable corrosion resistance and mechanism behaviors as those of the typical 300 series stainless steel. | 06-17-2010 |
