| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 420036000 |
Cobalt containing
| 61 |
| 420043000 |
Eight percent or more nickel containing
| 38 |
| 420060000 |
Copper containing
| 27 |
| 420040000 |
Rare earth containing
| 22 |
| 420056000 |
Eight percent or more total nickel plus manganese containing
| 21 |
| 420042000 |
Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability
| 16 |
| 420041000 |
Lead, bismuth, antimony, calcium, selenium or tellurium containing
| 15 |
| 420067000 |
Molybdenum or tungsten containing
| 9 |
| 420062000 |
Over 0.1 percent aluminum containing
| 7 |
| 420070000 |
Group IV or V transition metal containing | 3 |
| 20120237390 | Martensitic Stainless Steel Produced by a Twin Roll Strip Casting Process and Method for Manufacturing Same - Provided is a martensitic stainless steel produced by a twin roll strip casting process and a method for manufacturing the same, wherein the hot rolled steel has superior crack resistance. The martensitic stainless hot rolled steel sheet comprises, by weight %, C:0.1 to 1.5%, Cr:12 to 15%, Ni:1% or lower, Ti:0.005 to 0.1%, and the balance Fe and unavoidably added impurities, and wherein a primary chrome carbide precipitated at a grain boundary is fragmented and refined. Provided is a high hardness martensitic stainless cold rolled steel sheet manufactured by annealing and cold rolling the hot rolled steel sheet, and a method for manufacturing the same. A twin roll strip casting process is applied, and grain boundary strengthening elements are added to prevent center segregation, crack and strip breakage during casting, thereby ensuring the stability of the casting process. | 09-20-2012 |
| 20130121870 | FERRITIC STAINLESS STEEL, WITH HIGH AND STABLE GRAIN REFINING POTENCY, AND ITS PRODUCTION METHOD - A ferritic stainless steel comprising Cr: max 24 mass %, Ti: 200 to 1000 mass ppm, Zr: at least 200 mass ppm, whereby the Zr/Ti ratio is greater than 0.3, O: 10 to 150 mass ppm, N: at least 70 mass ppm, whereby the N/O ratio is greater than 1.5, C: max. 0.03 mass %, and balance Fe and residual elements. | 05-16-2013 |
| 20160122840 | METHODS FOR PROCESSING NANOSTRUCTURED FERRITIC ALLOYS, AND ARTICLES PRODUCED THEREBY - A method of forming an article including a nanostructured ferritic alloy is provided. The method provides steps for substantially inhibiting grain growth of a workpiece that includes nanostructured ferritic alloy, during heating and deforming at high temperatures and at high strain rates. Advantageously, the article is formed via conventional high strain rate techniques and thus, cost savings are provided. Articles are also provided which are formed by the method, and the articles so produced exhibit good mechanical properties at high operating temperatures, and thus are utilized as turbomachinery components, and in particular, component of a heavy duty gas turbine or steam turbine. A turbomachinery component comprising an NFA is provided. | 05-05-2016 |
| 420064000 |
Boron containing | 2 |
| 20140294662 | STAINLESS STEEL FOR CUTLERY AND METHOD OF MANUFACTURING THE SAME - The present invention has the ultimate purpose of obtaining cutlery having marked characteristics such as high hardness and high toughness, and provides an intermediate material, an annealed material, and a cold-rolled steel strip for stainless steel for cutlery, and a method for manufacturing them to achieve the purpose. Provided is an intermediate material for stainless steel for cutlery, the intermediate material being a material after hot rolling but before annealing, having a composition, in terms of % by mass, of from 0.46 to 0.72% C, from 0.15 to 0.55% Si, from 0.45 to 1.00% Mn, from 12.5 to 13.9% Cr, from 0 to 1.5% Mo, from 0 to 0.012% B, and the balance being Fe and impurities; and wherein a ratio of a diffraction peak area from an fcc phase (a sum total of diffraction peak areas from (200) plane, (220) plane, and (311) plane) to a diffraction peak area from a bcc phase (a sum total of diffraction peak areas from (200) plane and (211) plane) (the diffraction peak area from the fcc phase/the diffraction peak area from the bcc phase) is 30 or less in an X-ray diffraction of a vertical section. | 10-02-2014 |
| 20160168670 | TOUGH AND WEAR RESISTANT FERROUS ALLOYS CONTAINING MULTIPLE HARDPHASES | 06-16-2016 |
| 420035000 |
Noble metal containing | 1 |
| 20090214376 | CREEP-RESISTANT STEEL - The disclosure relates to a creep-resistant steel which having a chemical composition (values in % by weight) of: about 0.10 to 0.15 C, 8 to 13 Cr, 0.1 to 0.5 Mn, 2 to 3 Ni; at least one or both elements from the group Mo, W in a range in each case of about 0.5 to 2.0 or, if both elements are present, a maximum total of about 3.0; about 0.02 to 0.2 Nb, 0.05 to 2 Ta, 0.1 to 0.4 V, 0.005 to 2 Pd, 0.02 to 0.08 N, 0.03 to 0.15 Si; and about 80 to 120 ppm B, maximum about 100 ppm Al, maximum about 150 ppm P, maximum about 250 ppm As, maximum about 120 ppm Sn, maximum about 30 ppm Sb, maximum 50 ppm S, a remainder of the composition being iron and impurities. | 08-27-2009 |
| 420065000 |
0.25 percent or more nitrogen containing | 1 |
| 20140219857 | HIGH-PERFORMANCE HIGH-NITROGEN DUPLEX STAINLESS STEELS EXCELLENT IN PITTING CORROSION RESISTANCE - The present invention relates to high-nitrogen duplex stainless steels with an excellent eco-index and pitting corrosion resistance, in particular, to providing duplex stainless steels with ferrite-austenite phases, including: 16.5-19.5 wt. % of chromium (Cr), 2.3-3.5 wt. % of molybdenum (Mo), 1.0-5.5 wt. % of tungsten (W), 5.5-7.0 wt. % of manganese (Mn), 0.35-0.45 wt. % of nitrogen (N), with a remainder of iron (Fe). The high nitrogen duplex stainless steels with excellent eco-index and pitting corrosion resistance according to the present invention use manganese (Mn) and nitrogen (N) to exclude or mostly substitute Ni, which increases price instability of the steel grades and environment burden, to result in enhancing economic efficiency, price stability and eco-friendliness. | 08-07-2014 |
| Entries |
| Document | Title | Date |
|---|
| 20090246064 | Austenitic Stainless Steel Tube for Boiler with Excellent Resistance to High Temperature Steam Oxidation - The present invention relates to an austenitic stainless steel tube for boiler, used for superheater or reheater in thermal power plant, giving excellent resistance to high temperature steam oxidation, in particular to an austenitic stainless steel tube containing 16 to 20% Cr by weight, and being cold-worked at the inner surface of the tube. The Cr concentration in the vicinity of the inner surface of the steel tube is 14% by weight or larger, and the hardness at 100 μm depth from the inner surface of the steel tube is 1.5 times or larger the average hardness of the mother material or is HV 300 or larger. | 10-01-2009 |
| 20100178194 | Powder extrusion of shaped sections - The present invention provides a continuous powder extrusion method for making an article having a profile including an outer shape and optionally including one or more inner hollows. One or more bulk material powders and one or more binders are provided, and the bulk material powders and the binders are mixed to form a mixture. A die is provided, the die optionally including a mandrel having one or more shapes. The mixture is extruded through the die and the optional mandrel to produce a green form. The green form is debound to produce a brown form and the brown form is sintered to produce a densified form. The densified form is optionally processed using thermal, mechanical, and/or thermomechanical processing to produce a wrought form. The densified or wrought form is optionally cut to a length and/or finished using traditional metal finishing processes. | 07-15-2010 |
| 20120121451 | SPRAY COATING, METHOD OF FORMING SAME, SPRAY MATERIAL WIRE, AND CYLINDER BLOCK - An arc spray coating that is superior in both wear resistance and machinability, method of forming same, an arc spray wire used to form such a coating, and a cylinder block on whose bore inner surface is formed such an arc spray coating are provided. To this end, the arc spray coating contains Fe as a main component, 0.01% to 0.15% by weight of C, and at least 0.12% by weight of N, and the arc spray wire (wire) contains Fe as a main component, 0.01% to 0.2% by weight of C, and 0.25% to 1.7% by weight of Si, and may further contain at least 11% by weight of Cr as another embodiment. | 05-17-2012 |
| 20120237387 | STAINLESS STEEL HAVING LOCAL VARIATIONS IN MECHANICAL RESISTANCE - The disclosure mainly relates to a stainless steel sheet containing a minimum of 10.5% by weight of Cr and a maximum of 1.2% by weight of C, the microstructure of which is martensitic or austeno-martensitic and comprises at least 2% by volume of martensite, essentially characterized in that it comprises at least one local portion of lesser mechanical resistance, having a martensitic content at least 10% lower than that of the remainder of said sheet; said local portion being at least partly with a thickness equal to that of said sheet. The disclosure also relates to a method for manufacturing this steel sheet and to a steel part which may be obtained by deformation of this sheet. | 09-20-2012 |
| 20140334965 | USE OF NITROGEN COMPOUNDS IN THE PICKLING OF STAINLESS STEEL - The present invention relates to an acidic aqueous solution suitable for the pickling of stainless steel grades that comprises accelerators based on water soluble inorganic compounds comprising at least one nitrogen atom in an oxidation state in the range of −2 to −⅓. The present invention further encompasses a process for the pickling of stainless steel that makes use of a pickling solution comprising the above-mentioned accelerators. | 11-13-2014 |
