Copper alloys esfera. The single phase alloys have excellent ductility, and are often used in the cold worked condition for better strength. Copper alloys esfera

 
 The single phase alloys have excellent ductility, and are often used in the cold worked condition for better strengthCopper alloys esfera  The single phase alloys have excellent ductility, and are often used in the cold worked condition for better strength

The proportions of the copper and zinc are varied to yield many different kinds of brass. They are easy to cast and have good strength and corrosion resistance. Placentia, CA Distributor* $1 - 4. Terminology 3. Metallurgy of Copper-Base Alloys. , 9 Paxton Court, RedwoodPark, South Australia, 5097 Telephone: +61 (0) 437 707 043. Simply put, cast brass has too large of a grain structure and lacks. Bronze/Copper-tin. 18- and 9-carat gold alloys are commonly. 2: Copper-Base Alloy - C23000 (Red brass, 85%) 10. In many countries, as well as the more obvious copper-colored coins, "silver" coins are also copper alloys - this time with nickel; these are known as cupronickel alloys. The CuCrZr alloy plate (40 mm thick) was in hot rolled condition. 025 mm/y) or less, and for the copper-nickel alloys on the order of 0. Corrosion. This specification establishes the requirements for sheets and strips of various thicknesses produced from copper (Copper UNS No. * = alloys registered with U. 95% Cu, 0. C10300. , 2. How structure and properties of cast copper alloys depend on consumption and comparative data on applications and relative costs of 13 standard bearing alloys. 03. This grave contains c. Copper Alloys. 03% O2, and less than 50 ppm metallic impurities. Wood. Over half of the copper produced is used in electrical and electronic applications. Gunmetal - Alloyed with Tin, Zinc and Lead. Powder Type. Copper’s superior conductivity allows smaller conductors to be used, saving. The single phase alloys have excellent ductility, and are often used in the cold worked condition for better strength. The corrosion process typically involves the formation of copper oxide or copper sulfate. Oxygen-free copper alloys, are made by melting cathode copper in low hydrogen, reducing conditions, without the addition of a deoxidising agent. ,”. Their uses include marine equipment and inorganic acid and alkali handling equipment. These alloys are divided into high-strength (typically containing 1. They have high wear resistance and low friction coefficient against steel. Green for copper and its alloys. Estabelece os requisitos para valvulas de esfera com extremidades roscadas, flangeadas ou soldadas para uso geral em instalaoes industriais,prediais ou domiciliares de gua, leos, gases derivados de petrleo e outros. 10 Copper Facts. Copper is a major metal and an essential element used by man. The ores must be processed to extract the metals of interest from the waste rock. 5% copper. 0 mpy (0. From the. Tough Copper Alloys INC. 1 ). (CDA) is the market development, engineering and information services arm of the copper industry, chartered to enhance and expand markets for copper and its alloys in North America. The color of copper alloy powders is a soft pink, with finished AM parts displaying that classic, copper-color glow. EPA as antimicrobial. Copper is one of the most useful metals known to man. Select the alloy (s) and one or more properties you would like to see displayed. 21% during the forecast period. 3 Solidification cracking. 05 mpy (0. 61 shipping. Hydrometallurgy. Here are the top-ranked copper alloy companies as of November, 2023: 1. Different types of Copper/Silver Alloys. These fabrication methods require specialised, heavy equipment and skilled operators. The. As solid solution alloys, the 90-10 and 70-30 alloys cannot be age hardened. Alloys also tend to be lighter in weight than pure copper because they contain a mixture of lighter elements such as. The alloy is not subject to dezincification and has reasonable. Adding Iron into Copper. 08 in (2 mm) thick were applied. The addition of zinc gives the alloy a higher strength and ductility. 52Hir: M. 100 90The mechanical properties of copper-nickel alloys show a combination of good tensile strength and excellent ductility when annealed. BBB Directory of Copper near Victoria, BC. Introduction. 7 introduces another new DM: hydriding of titanium alloys. * = alloys registered with U. 22. 6% aluminium,. Whereas 90-10 Cu-Ni tubing can have a proof. The development of a new type of environmentally friendly, ultrahigh strength, high stress relaxation resistance, good formability, and high reliability conductive elastic copper alloy has become a research focus for elastic materials. Due to the coexistence of different types of phases in this matrix, complex regions exist for which information on their precise atomistic structure is missing. 2024 aluminum alloy is of the 2xxx series, which include alloys that use copper as their principal alloying component. The single phase alloys have excellent ductility, and are often used in the cold worked condition for better strength. What Is Copper Alloy? Copper alloy (copper alloy) is an alloy formed by adding one or more other elements to pure copper as the matrix. As copper has a high solubility for zinc, the alloys are very homogenous. 2. Copper alloys are known for their excellent corrosion resistance, but it is not entirely immune to corrosion. From the point of view of strengthening mechanism there are three categories of copper alloys for connector applications: solid solution-strengthened, dispersion-strengthened and precipitation-hardened. 3. Corrosion resistance of copper-nickel alloys Attachment by marine organisms Literature on copper-nickel alloys Architecture, building and construction Stainless steel reinforcement: the role of nickel Stainless steel in structural applications: the role of nickel. Copper Alloys Search - Basic; Copper Alloys Search - Advanced; Properties of Copper; Low Temperature Properties of Copper; Cryogenic Properties of Copper; Copper Compounds; Microstructures of. Copper alloys are known for their excellent corrosion resistance, but it is not entirely immune to corrosion. This Standard includes: (a) pressure-temperature ratingsPublisher Summary. 3 Physical Properties of Copper and Copper Alloys 671 4. 1/8″ – 9″ diameter. The initial brown-black appearance is attributed to semiconducting properties of cuprite (Cu 2 O) and fully attained at thickness 0. This chapter provides an overview of copper and copper–nickel alloys. The structure of the as-cast material is. 1 INCH COPPER HALF BALLS - HEMISPHERE-110 ALLOY (25 PACK) $34. 4: Copper-Base Alloy - C26000 (Cartridge brass, 70%) 11. The MRSA "superbug" is a virulent bacterium resistant to broad spectrum antibiotics and, therefore, very difficult to treat. 8 ± 0. e. Optical and scanning electron microscopy studies of corroded specimens with columnar and equiaxed microstructures in 0. Copper alloys vary widely in their resistance to velocity, with C95500 being the most resistant of the cast alloys, C72200 the most resistant. As the PCA biplot on the ICP-OES quantitative data shows (Fig. 4. 3. The strongest composite we offer; comparable in strength to 6061 aluminum but lighter in weight. 10g – 21g. Aluminum bronze castings are annealed at 620–670 °C. 1. G. MetalTek specializes in bronze alloys and does not typically cast purely brass alloys. 2. Platinum and copper along with their alloys have been used in a broad range of applications including jewelry, coinage, electrical and electronic devices, and many others. Copper-lead alloys containing about 30% lead are stronger but have less satisfactory surface properties and are usually used with a thin lead-tin overlay. 2023 Metallic Trend: About the Thermophysical Properties of Copper and its Alloys. 1069 Stinson Drive Reading, PA 19605. The metal is an essential trace. 025 mm/y); for copper-nickel, the most resistant alloys approach 0. 3. The first material to solidify is almost pure copper, as the dendrites continue to solidify they become a mixture of copper and zinc. High purity copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Number ranges available for positions 3, 4 and 5. bronzes, nickel bronze, ma nganese bronze alloys, chromium copper, and copper. Copper is a ductile and malleable reddish-gold metal with the capacity to conduct heat and electricity. Li,1 B. In 303 alloy, the chromium content is reduced to 17%, and 1% of the alloy is sulfur. Copper zinc alloys are single phase up to about 37% zinc in the wrought condition. The best-known copper alloys are bronze and brass. In the interest of protecting public health, especially in healthcare environments with their susceptible patient populations, an abundance of peer-reviewed antimicrobial efficacy studies have been conducted in the past ten years regarding. 5 M, and 1 M NaCl solutions were conducted. 05% Iron (Fe) and the remainder Zinc (Zn). From: Encyclopedia of Materials: Science and Technology, 2001. Beryllium copper (2 percent Be) is an unusual copper alloy in that it can be hardened by heat treatment. Kushal Copper Corporation. Effect of Quenching Temperature on the Electrical Resistance of Mangan-ese-Copper Alloys 30 Fig. Grain Size Comparisons. 025 mm/y) or less, and for the copper-nickel alloys on the order of 0. 4. 0005% oxygen content. The as-received copper alloys were processed by solution treatment, water quenching, cold-drawing and ageing treatment successively. Abstract. 05-0. Bell metal is a hard alloy used for making bells and related instruments, such as cymbals. The high mechanical strength is achieved by precipitation hardening or age hardening. 4. The rod ingots were 30 and 40 mm in diameter and approx. Commonly used as downhole tubular components, packers, and other subsurface equipment, it is included in API 5CT as Group 2, Grade L80, Type 13Cr. From metal sheets, tapes or flat bars of copper and copper alloys, samples with dimensions of 0. 025 mm/y); for copper-nickel, the most resistant alloys approach 0. Copper alloys are alloys based on copper, in which the main alloying elements are Zn, Sn, Si, Al, Ni. Foam. It has 38% copper, 17. First, the alloy must be solution annealed so that theThe microstructure of the as cast copper lead alloys consists of pure alpha copper dendrites, with lead globules in the boundaries between the dendrites. There are two groups of copper beryllium alloys, high strength alloys and high conductivity alloys. Copper is used as a conductor of heat and electricity, as. Base metals are more common and more readily extracted than precious metals, which include gold, silver, platinum, and palladium. , Ni–Cr) on steel and zinc-based castings. 8 –Ni 2 –Mn 0. Pure copper has good electrical and thermal conductivity. Copper Alloys. 3%. Available in round rod and strip forms. Cast copper alloys with between 2% and 11% Sn and 1–10% Zn are termed gunmetals. Despite the relatively low antibacterial efficacy of cuprous oxide (Cu2O) compared to pure copper, it is still worth consideration in some scenarios. 4% P are wrought alloys known as phosphor bronzes. PerforMet alloy is a nickel-silicide-strength - ened bronze that withstands high pressures and temperatures. These analytical chemistry standards present various test methods and techniques in determining the chemical composition of alloys and ores which include molecular absorption spectrometry, X-ray emission spectrometry, optical. The best known traditional types are bronze, where tin is a significant addition, and brass, using zinc instead. Locations Distributor* $50 - 99. For example, a specific alloy might assume its maximum strength by aging for 5 h at 325 °F (165 °C. % Zr alloy) is the state-of-the-art material used to make the liner in engines such as RS-25 and RS-68. If simple bends are required but strength is also important, H02 (half hard) will be the best temper to use. 3. The metal-specific migration rates from polished alloy surfaces are higher in gastric (pH 1. It is used in applications such as resistance welding electrodes, seam welding wheels, switch gears, cable. Excellent electrical conductivity. 001 mm/y), within those velocities that each alloy can tolerate without damage to the protective corrosion product film. Arsenical copper Beryllium copper (beryllium) Billon (silver) Brass (zinc) Calamine brass (zinc) Chinese silver (zinc). Solid State Reduction. All copper beryllium alloys are readily machinable using conventional processes and the guidelines provided in this brochure. The lower the number, the larger the particle size within the solder powder. In its age hardened condition, Alloy 25 attains the highest strength and hardness of any commercial copper base alloy. 4. Copper alloys are generally very malleable, with most being able to be rolled or. It is easily mixed with other metals to form alloys such as bronze and brass. 01 and 0. 05: Silver, solid or plated; monel metal & High nickel-copper alloys: 0. OF Copper (C101) OF copper is a 99. For the as-fabricated C-18150 AM parts, horizontal and angled. The as-cast structure of the low zinc brasses consists of alpha dendrites. Laboratory testing shows that, when cleaned regularly, EPA-registered antimicrobial copper alloy surfaces kill greater than 99. These affect copper alloys and are all related to the leaching out of alloy constituents (the alloys are obvious as they appear in the DM title). Copper itself is essential for the full wiring harness, alternator and starter motor windings and other motors and actuators. 5% nickel, 11% cobalt, and 2% silver. 5% silver to 7. The ultimate tensile strength can exceed 200 ksi, while the hardness approaches Rockwell C45. Based on the typical demand for advanced copper alloys by emerging industries and major engineering projects, such as electrical engineering, electronics, 5G communications, new energy vehicles, aerospace, and rail transit, this study systematically summaries the current status of international and domestic copper alloy industries, including high-strength and high-conductivity copper alloy. The common trade name of this alloy is 85-5-5-5; the correct. Anti-Bacterial – copper compounds have been used as bacteriostatic agents and fungicides, as well as wood preservatives. . History of Copper. 61 shipping. IndiaCopper alloys containing 1 to 6% Pb are free machining grades, and are used widely for machined parts especially those produced in screw machines. 3. It is used where ease of welding and brazing are especially important. Taking copper-nickel co-sputtered thin films with two copper contents. The only other non-silvery metal on the periodic table is gold, which has a yellowish color. This metal alloy is typically bright gold in colour, but can be reddish-gold or silvery-white as well. Susceptibility to stress-corrosion cracking (SCC. Satin and Mirror Finishes. Some alloys are listed under more than one element, since the composition of the alloy may vary such that one element is present in a higher concentration than the others. 05 mpy (0. Copper - From Beginning to End. Introduction. * = alloys registered with U. Each record. 08-cmCopper/Copper Alloys Safety Data Sheet According To Federal Register / Vol. Copper alloys Electrical conductors and wire, electronic circuit boards, heat exchangers, boilers, cookware, coinage, sculptures Lead alloys Roof and wall cladding, solder, X-ray shielding, battery electrodes Magnesium alloys Automotive castings, wheels, general lightweight castings for transport, nuclear fuelAn alloy is a material made by melting one or more metals together with other elements. B164-03(2019) Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire . The main difference between alloy vs. They have high resistance against corrosion. Offered in round, square, and rectangular shapes. CDA offers a wide array of useful resources for the professional. Copper alloys are metal alloys that have copper as their principal component. Brasses are copper zinc alloys containing up to about 45% zinc, with possibly small additions of lead for machinability, and tin for strength. copper-covered steel wires, investigated in Section 4-1, were compared, additionally, with those of existing copper alloys, as shown in Fig. 8 –Ni 2 –Mn 0. 025 mm/y) or less, and for the copper-nickel alloys on the order of 0. The analysis reveals the disc to be made of leaded gunmetal with the following major elements: copper (66. com. 5% zinc and 2. A Reference Material is defined as:Copper Alloys. Copper possesses the highest electrical conductivity of all commonly found metals on earth. 300 mm in length. Its controlled. Abstract. Forms: 2-20 Ingot. B514-05(2019) Standard Specification for Welded Nickel-Iron-Chromium Alloy Pipe . 4 to 2% of beryllium with about 0. 3. S. Covers production, consolidation, strengthening, copper in iron and steel P/M parts, and non-structural applications. Commonly used as downhole tubular components, packers, and other subsurface equipment, it is included in API 5CT as Group 2, Grade L80, Type 13Cr. This is a list of copper alloys or alloys in which copper is usually the base metal. A wide variety of copper alloys are available for use in construction. 9 Mil 1941 1000+. Brass is an alloy made of copper and zinc. Job shops. This high-strength, exceptionally corrosion-resistant. Copper-Base Alloy - C18200 (Chromium Cu) 9. This Standard includes: (a) pressure-temperature ratings Publisher Summary. Although 70-30 Cu-Ni is essentially non-magnetic, 90-10 Cu-Ni has a. This zinc copper alloy may also contain minor amounts of other elements such as iron, nickel, silicon, or aluminum. In order to remove corrosion inhibitor from their surfaces, samples were subjected to mechanical polishing and then chemical polishing in a mixture of concentrated acids: orthophosphoric (V) H 3 PO 4 , nitric(V) HNO. Alnico (aluminum, nickel, copper) Duralumin (copper, aluminum) Magnalium (aluminum, 5% magnesium) Magnox (magnesium oxide, aluminum) Nambe (aluminum plus seven other unspecified metals) Silumin (aluminum, silicon) Zamak (zinc, aluminum, magnesium, copper) Aluminum forms other complex alloys with magnesium, manganese, and platinum. 13 wt% Zr. 1. Cryogenic Properties of Copper. Activity of Copper in its Alloys with Gold and the Entropy of Cuprous Oxide,” Compt. Material Groups. High-tin bronzes are known for their strength and corrosion resistance, while low-tin bronzes are known for their. 8) and a brass (HB: Cu–Al 4 –Zn 25 –Fe 3 –Mn 3. Stubbins3 ABSTRACT This paper reviews expressions to quantify thermal creep and fatigue lifetime for four copper alloys, Cu-Ag-P, Cu-Cr-Zr, Cu-Ni-Be and Cu-Al2O3. 05% Lead (Pb) and 0. Over the following decade, the International Copper Research Association (INCRA - now the. The test materials (Table 1) included copper alloy mesh stock formed from a 65% copper - 35% zinc alloy (“CAM”), 97% bronze - 3% silicon welded wire mesh (“Bronze”), a stock sheet of 90% copper - 10% nickel (“Sheet”), an expanded mesh (“Mesh”) that was made from the same production run as the 90:10 Cu:Ni sheet, and conventional. 2 Lattice Parameters of Manganese-Copper Alloys. In the designation system, numbers from C10000 through C79999 denote wrought alloys. 1 M, 0. It remains usually expressed as a percentage reduction in area. Typical uses include bus bars or any electrical conductor, and it may be specified as a special copper magnet wire conductor. Brass is typically applied more widely. 1. Serves as a master alloy to add chrome to various copper alloys. It is a common source of infection. Copper was the first metal to be worked by man, along with gold and meteoritic iron. Alloys without iron, are annealed in the temperature range of 595–650 °C. Taking copper-nickel co-sputtered thin films with two copper contents. ] A list of components that may be fabricated out of Antimicrobial Copper Alloys - Group I is specified below. In fact, one of the major "ages" or stages of human history is named for a copper alloy,. S. The brass family of copper alloys incorporates zinc and other metals in different ratios to enhance strength, ductility, conductivity, corrosion resistance, and machinability. Easily identifiable because of its iridescent, golden red color, copper and its alloys, have been used by humans for thousands of years. 001 mm/y), within those velocities that each alloy can tolerate without damage to the protective corrosion product film. It is manufactured from alloy C23000 which is comprised of approximately 85% Copper (Cu) with no greater than 0. 05 mpy (0. III. Zinc die casting alloys: >78% Zn by weight, it usually contains small amounts (less than a few. They also retain excellent impact resistance to 20 K. F. International Annealed Copper Standard: 100% give 5. coinage. Wrought Copper Alloy Families § C100xx-C150xx Commercially Pure Cu § C151xx-C199xx Age Hardenable Cu (w/ Cd, Be, Cr, Fe) § C2xxxx Cu-Zn alloys – Brasses § C3xxxx Cu. The beryllium-copper alloy's yield. % Cu) completely annihilated E. The age-hardening behavior is based on the fact that the solubility of Cd, Be, and Cr in Cu decreases with decreasing temperature. From 1982 through today, pennies are 97. Below is a breakdown of the copper grade numbering system to help you understand copper alloys and the characteristics of each series. ρl = Q + l. Industrial Metals. Copper and copper alloys are one of the major groups of commercial metals. Material Description Beryllium alloys are the most common form of beryllium product, accounting for an estimated 75% of the total U. This alloy has excellent corrosion resistance and is highly resistant to attack by acids, alkalis, and bacteria. Pure Cu is well known to have excellent electrical conductivity but rather low strength. Electrolysis. Copper and its alloys are relatively good conductors of electricity and heat. The Copper Development Association Inc. There are approximately 3,000 nickel-based alloys in use today. Cast Copper Alloy Threaded Fittings: Classes 125 and 250 ISBN: 9780791833834 - Pag:40 This Standard covers cast Class 125 and 250 copper alloy threaded pipe fittings with provisions for substituting wrought copper alloys for plugs, bushings, caps, and couplings in small sized sizes. The mentioned alloys show a Cu content of above 96% for wrought alloys and 94% for cast alloys. Gold is used extensively in jewellery (about 75% of all world production), either in its pure form or as an alloy. Copper Alloys Search - Basic. Copper and copper alloys are applied for a variety of purposes: as decorative finishes, to aid in electrical conduction, as a protective layer against fretting corrosion, and as an undercoat for other metal coatings (e. Copper Alloys as Determined by Ishiwara. The mechanical processes performed on copper alloys, either as initial finishes for later patination or as final finishes, involve similar techniques to those used on stainless steel and aluminum. ESA experience in copper is mostly, but not exclusively, concentrated in the design of combustion systems and burner for shaft melting furnaces, holding. Commercial, high-purity copper and three representative copper alloys were selected for the study. It is not a specification of copper and copper alloys. 8%). II. %) and their UNS (Unified Numbering System) code. The high-copper alloy family includes, in wrought forms, cadmium coppers (C16200 and C16500), beryllium coppers (C17000-C17500), chromium coppers (C18100-C18400), zirconium copper (C15000), chromium-zirconium copper (C14500) and combinations of these and other elements. Each record. The deformation mechanisms, microstructure evolution, and dynamic. 887 products. As a constituent of various metal alloys, such as sterling silver used in. Laser cladding has been used to improve the surface properties of copper and copper alloys for many years. heycometals. Updated on August 21, 2020. And as alloyed in bronze (copper-tin alloy) about 3000 BC, was the first engineering material known to man. The standard length for red brass pipe is 12 feet. The copper most commonly used for sheet and strip applications complies with ASTM B370. 1) or "native" metals (such as native copper) that are not commonly concentrated in the Earth's crust, or "noble" metals (not usually forming compounds) such as gold (Figure 12. EPA as antimicrobial. Using Cu–1. In order to systematize this colorful collection and provide a basis for specification, the National Association of Architectural Metal Manufacturers (NAAMM) and the National Ornamental & Miscellaneous Metals. These general characteristics have been revealed in tests on 15 copper alloys, including brasses, bronzes and commercially pure coppers. Fortunately in the UK we use the metric system to weigh up scrap metal. Korea ASEM Corporation Ltd, 109 Jeda-dong, 26-8, 1 Gil, Seungsam, Gyeong-ju Korea Telephone: +82 010 3650 2744. Both the high strength and the high conductivity Performance Alloys copper beryllium alloys are available in several wrought forms (e. 5% silver to 7. 26 - Cast Copper Alloy Fittings for Flared Copper Tubes. The conductivity of copper alloy strip metals is measured relative to a standard bar of "pure" copper that was long ago assigned a value of 100. S. 34%) and lead (2. Columbia Metals stocks copper nickel alloys – generally known as cupronickels – and high copper alloys, which are those that usually contain more than 95% copper with only a small addition of elements such as nickel, silicon. It consists of 99. Copper Alloys. Copper alloys become stronger and more ductile as temperature goes down. 1. The temper will determine just how malleable the copper sheet will be. Modulus of Elasticity in Tension ksi. Cast Copper Alloy Threaded Fittings: Classes 125 and 250 ISBN: 9780791833834 - Pag:40 This Standard covers cast Class 125 and 250 copper alloy threaded pipe fittings with provisions for substituting wrought copper alloys for plugs, bushings, caps, and couplings in small sized sizes. High strength and high conductivity (HSHC) Cu alloys are widely used in many fields, such as high-speed electric railway contact wires and integrated circuit lead frames. Their thermophysical properties play an important role in casting processes and are required as input data for casting simulation. 001 mm/y). Updated on August 21, 2020. Copper production from recycling copper and copper alloy end-of-life objects (old scrap) amounts to 15%–20% of the above. The plate was heat treated (F) at 960°C. Copper alloys and copper matrix composites have been attracting a lot of attention lately. 1 Significance—This classification establishes an alpha-numeric code of the tempers of copper and copper alloy products. This range is representative of practically all of the copper alloys used for connector springs. The effect of aging processes on the tensile properties of C-18150 copper alloy samples, made by laser powder-bed-fusion additive manufacturing (AM) process with three different fabrication orientations (horizontal, angled, and vertical to the build direction), are investigated. Coveted for its soft, golden bronze tone, C22000 can. 9 kg/dm3 for all Cu-Ni alloys specified in DIN 17 664. 3% or higher. Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F. 8: Copper-Base Alloy - C18700 (Leaded Cu) 9. Brass works as an alloy because copper and zinc are close to one another in the periodic table and have atoms of roughly similar size. The most common solder paste powder sizes for SMT are type 3 (T3), type 4 (T4), and type 5 (T5). If there is a higher percentage of copper, there. Alloying invariably decreases electrical. . Cold-rolled copper products—including sheets, coils, rods, bars, and some plates—are produced with an “as fabricated” finish. 2011, com o número de Projeto ABNT NBR 15827. , Inc. A Copper (Cu) Alloy containing Chromium (Cr) used for their high strength and corrosion resistance. This section displays photo micrographs of commercially important and/or metallurgically interesting copper and copper alloys and processings.