Copper beryllium alloys have good thermal and electrical conductivities and high strength. The strengthening precipitates which result from precipitation heat treatment are not resolved by optical microscopy. Description: Mill hardened to TM08 temper for high strength and limited formability. The composition of each is shown in the table below. The strengthening metastable precipitates are not resolved. The equilibrium gamma phase appears as dark nodules on a bright matrix in over aged copper beryllium alloys. (1) In the precipitation hardened condition. There are two groups of copper beryllium alloys, high strength alloys and high conductivity alloys. The microstructure of the wrought material, after precipitation hardening, contains roughly equiaxed, twinned grains of alpha copper and a dispersion of nickel, cobalt or nickel and cobalt beryllide particles. Class 3 castings are recommended for welder components that carry current, and are under heavy load, including heavy duty offset electrode holders. Cast beryllium coppers are frequently used for plastic injection molds. Two major groups of copper beryllium alloys include high conductivity alloys and high strength alloys. It is commonly used in parts that require high strength and electrical conductivity such as musical instruments, precision measurement devices, bullets and aerospace. In the high-strength alloy castings the inter dendritic network is composed of alpha and gamma. Since they do not trade high strength for conductivity, they are well suited to address the challenges in connectors and other harsh-environment components. CDA 172 Beryllium Copper is commonly used due to it's high strength and hardness compared to other commercial copper alloys. Description: Solution annealed at 790 C (1450 F), quenched to room temperature. The strengthening precipitates which form during precipitation heat treatment are not resolved by optical microscopy. https://api.copper.org/CDA-API/alloys.xhtml/C17200, Mill-hardened Temper, TM -XHM - Extra Hard, Solution Heat Treated and Cold Worked: 1/2 Hard, Solution Heat Treated and Cold Worked: 1/4 Hard, Solution Heat Treated and Cold Worked: Hard, Solution Heat Treated and Cold Worked: 3/4 Hard. The cast alloys are designated as C82000 to C82800, an… c175100: plate: astm: b534: copper-cobalt-beryllium alloy, plate, sheet, strip, and rolled bar: rod: astm: b441: copper-cobalt-beryllium (uns no. High strength beryllium copper alloys contain 0.4 to 2% of beryllium with about 0.3 to 2.7% of other alloying elements such as nickel, cobalt, iron or lead. Co+Ni+Fe: 0.60% Max. The beryllides are finer in the wrought material than the cast material because they are broken up during the thermomechanical processing. Striations are caused by metastable precipitation within the alloy. Description: Solution annealed at 900 C (1650 F), cold rolled to Hard temper and precipitation hardened at 480 C (900 F) for 2 h to achieve maximum hardness. Beryllium copper is a ductile, weldable and machinable alloy It can be heat-treated to improve its strength, durability and electrical conductivity. As age hardening progresses, coherent metastable gamma double prime precipitates form from the G-P zones. Structure consists of slightly elongated grains of alpha phase, and small nickel beryllide particles. KCN (potassium cyanide), 5 ml. These beryllides form during solidification and have a Chinese script morphology. The strengthening metastable precipitates are not resolved. Equiaxed grains of alpha phase are observed with small nickel beryllide particles uniformly distributed throughout the matrix. Followed by the precipitation of gamma prime precipitates. The cast, high-strength alloys have beryllium concentrations up to 2.7%. Beryllium-Copper is one of numerous metal alloys sold by American Elements under the trade name AE Alloys™. The alloy composition of the invention is a nickel-copper-beryllium alloy composition which may include from about 1 to about 40 wt % copper. BERYLCO 25 Cu Be 2 CW 101 C C17200. Longitudinal section shows elongated grains of alpha phase and cobalt beryllides. The secondary beryllides form after solidification and have a rod like morphology. The wrought high strength alloys consist of 1.6 to 2.0% of beryllium and nearly 0.3% of cobalt. There are two groups of copper beryllium alloys, high strength alloys and high conductivity alloys. The beryllides can be seen in the as polished condition, it is not necessary to etch the specimens to reveal their structure. Small cobalt beryllide particles are uniformly dispersed throughout the matrix. NOTE: The file size of the Larger and Largest View of the Micrographs are substantially larger than the thumbnail shown. Strengthening precipitates which form during precipitation heat treatment are not resolved by optical microscopy. Chemical Composition; Element Cu (1,2) Al Be Co (3) Si (1) Cu + Sum of Named Elements … Ammonium persulfate/ammonium hydroxide; 1 part NH40H (ammonium hydroxide) (conc) and 2 parts (NH4)2S208(anmonium persulfate), 2.5% in distilled water. The high strength of the copper beryllium alloys is attained by age hardening or precipitation hardening. The gamma double prime and gamma prime precipitates, in both the high conductivity and high strength copper beryllium alloys, are too small to be resolved with an optical microscope, and therefore do not appear in the optical micrographs. Longitudinal section shows roughly equiaxed grains of alpha copper-rich solid solution matrix phase. Copyright © 2020 Copper Development Association Inc. All Rights Reserved. The wrought high strength alloys contain 1.6 to 2.0% beryllium and approximately 0.3% cobalt. Brush Wellman manufactures beryllium copper in several distinct compositions. Materion’s copper beryllium Alloy 25 (UNS C17200), Alloy M25 and Alloy 165 each have a unique property set that makes them multipurpose solutions across these industries. Copper beryllium also has an elastic modulus 10 to 20 percent higher than other specialty copper alloys. The Largest View images range in size from 125K to almost 500K. These alloys are used for all applications, which require high strength, stiffness and good conductivity. ksi. Most manufacturing operations, conducted properly on well-maintained equipment, are capable of safely processing copper beryllium-containing materials. The cast materials have high fluidity and can reproduce fine details in master patterns. The general microstructural features of the beryllide phases are similar in the cast and wrought materials. C17510 Beryllium Copper is specifically recommended for projection welding dies, flash and butt welding dies, current carrying shafts and bushings. The tensile strength of C17200 copper is over 1380 MPa (200 ksi). These gamma precipitates are typically found at the grain boundaries and have a plate like morphology. The gamma double prime and gamma prime precipitates responsible for the age hardening are too small to be resolved directly with an optical microscope. The beryllide particles are roughly spherical and blue gray in color. Copper beryllium alloys are used for their high strength and good electrical and thermal conductivities. CDA 172 strength and hardness is similar to that of steel. Beryllium Copper CB 101 Available in any of the 'profile options' This age hardenable copper alloy combines a range of properties suited to meet the exacting requirements of many automotive, electronic and aerospace industries. There is no transformed beta in microstructure of the wrought materials because it is dissolved during thermomechanical processing. Description: Solution annealed at 900 C (1650 F), and precipitation hardened at 480 C (900 F) for 3 h to achieve maximum hardness. Small amounts of equilibrium gamma phase are present in the grain boundaries. Beryllium Copper Physical Properties 25 C17200 Yield Strength . copper-beryllium welded heat exchanger and condenser tube uns no. The small ratio of beryllium to copper creates a family of high copper alloys with strength as high as alloy steel. Longitudinal section shows elongated grains of alpha phase and cobalt beryllides. The standards in the chart below should be for reference only, as alloys can be subject to considerable variation depending upon conditions of heat treatment. The presence of the age hardening precipitates in the high strength alloys can be detected indirectly by the striations that appear through the grains. Description: Cast, homogenized and hot worked. There are striations on the polished surface of these alloys when the age hardening precipitates are present and the striations etch very dark. Longitudinal section shows equiaxed alpha grains and the cobalt beryllide phase uniformly dispersed throughout the matrix. Beryllium Copper C172 / C17200 / Alloy 25 ASTM B196, AMS 4533, DIN 2.1247, BS 2870 CB101, BS 2871 CB101, BS 2874 CB101, EN CW101C Farmer’s Copper Ltd. inventories C17200 Beryllium Copper. The cast copper beryllium alloys have the typical dendritic structure of alpha (pure) copper, with the addition of the beryllide phases. These alloys are used in applications such as electronic connector contacts, electrical equipment such as switch and relay blades, control bearings, housings for magnetic sensing devices, non sparking applications, small springs, high speed plastic molds and resistance welding systems. The high mechanical strength … The G-P zones have no well defined crystal structure of their own and they contain a high concentration of, in this case, beryllium atoms. Architecural Manufacturers & Distributors, Architectural Installation Contractors Database, UNS Standard Designation for Wrought and Cast Copper, ASTM Standard Designation for Wrought and Cast Copper and Copper Alloys, European Numbering System for Non-Ferrous Metals, Copper - The World's Most Reusable Resource, Safe Drinking Water Act and Copper Alloys, Toxicological Differences in Lead and Copper, Lead-free Solders for Drinking Water Plumbing Systems, Cast, hot rolled, intermediate annealed, cold rolled, solution annealed and cold rolled 37% to Hard temper, Ammonium persulfate/ammonium hydroxide; 1 part NH40H (ammonium hydroxide) (conc) and 2 parts (NH4)2S208(arnmonium persulfate), 2.5% in distilled water, Ammonium persulfate/ammonium hydroxide; 1 part NH40H (ammonium hydroxide) (conc) and 2 parts (NH4)2S208 (ammonium persulfate), 2.5% in distilled water, Cast, hot rolled, intermediate annealed, cold rolled, and solution annealed. The search phrase you entered, beryllium copper, is common to 335 materials, by searching on the exact phrase [ "beryllium copper"] in the most common text fields. The wrought high strength alloys contain 1.6 to 2.0% beryllium and approximately 0.3% cobalt. Follow the links below to view complete property information. Copper Beryllium Wrought Alloy MSDS March 3, 2003 Page 2 of 12 3.2 POTENTIAL HEALTH EFFECTS Exposure to the elements listed in Section 2 by inhalation, … Nominal Composition: Be 1.80-2.00, Co + Ni 0.20 min, Co + Ni + Fe 0.6 max, Ph 0.02 max, Cu + Sum of Named Elements 99.5 min. Description: As-cast microstructure showing interdendritic networks of large primary beryllide phase that form during solidification in an alpha copper-rich solid solution matrix. The precipitation of the equilibrium gamma phase depletes the metastable gamma prime precipitates, and softens the alloys. Cu: Balance Note: Copper plus additions equal 99.5% minimum. In the case of beryllium copper alloys, the property change is an increase in strength. Alloy C17200 tubing, BeCu sheet C17200, Copper alloy C17200 bar Beryllium copper (BeCu) alloy C17200, also known as Alloy 25, has superb electrical and thermal conductivity and extremely ductile. Then the alloy is given a precipitation or age hardening treatment for an hour or more at a temperature between 200 and 460 C. Upon tempering, the beryllium containing phases, called beryllides, precipitate out of solution. The strength of these alloys increases as a result of the coherency strains that develop at the interface between the matrix and the growing precipitates. The UNS designations for the wrought alloys are C17200 through C17400 and the cast alloys are C82000 through C82800. Standard beryllium copper alloys contain close to 2% beryllium, while the beryllium content in proprietary alloys can range from 1.5% to 2.7%. Typical Physical Properties: Density (g/cm3): 8.36 Density before age hardening (g/cm3): 8.25 Elastic Modulus (kg/mm2 (103)): 13.40 Thermal Expansion Coefficient (20 °C to 200 °C m/m/°C): 17 x 10-6 Description: Mill hardened to TMOO temper to achieve maximum formability at moderate strength. Nominal Composition: Be 0.60, Ni 1.5, Cu + Sum of Named Elements 99.5 min. Longitudinal section shows equiaxed grains of supersaturated alpha phase, solid solution of beryllium in copper. Primary beryllides form blue gray intermetallic particles that can be up to 10 microns long. Nominal Composition: Be 2.06, Co 0.50, Si 0.25, Cu + Sum of Named Elements 99.5 min. The G-P zones are small precipitation domains in a supersaturated alpha copper solid solution. Longitudinal section shows the alpha copper-rich solid solution phase with elongated grains as a result of cold working before precipitation hardening. Nominal Composition: Be 0.2-0.6, Ni 1.4-2.2, Cu + Sum of Named Elements 99.5 min. These fall into two categories: alloys selected for high strength (Alloys 25, 190, 290, M25, and 165) and alloys selected for high conductivity (Alloys 3, 10, and 174). Striations in alpha matrix are the result of concurrent metastable precipitate formation, not optically resolvable. Description: Solution annealed at 900 C (I 650 F), cold rolled 11%, and precipitation hardened at 480 C (900 F) for 2 h to achieve maximum hardness. The grain sizes are relatively fine due the dispersion of the beryllides. The precipitation occurs during the slow cooling of the alloys because the solubility of beryllium in alpha copper decreases with decreasing temperature. Striations are the result of metastable precipitation in the alloy. One of the highest strength copper based alloys available on the market today is beryllium copper, also known as spring copper or beryllium bronze. 10 8 cycles. The cast, high-strength alloys have beryllium concentrations up to 2.7%. Cobalt beryllide particles are observed uniformly dispersed throughout the matrix. : Ni + Fe + Co 0.6% max. Striations are caused by metastable precipitates, not resolved by optical microscopy. Description: Solution annealed, cold rolled 37% to Hard temper and precipitation hardened at 315 C (600 F) for 2 h to achieve maximum hardness. * Measured at room temperature, 68°F (20°C). distilled water, Cast, hot rolled, intermediate annealed, cold rolled, solution annealed, cold rolled and age hardened to maximum hardness, Cast, hot rolled, intermediate annealed, cold rolled, solution annealed and age hardened to maximum attainable hardness, Cyanide / peroxide / hydroxide - 20 ml. Description: Solution annealed at 790 C (1450 F) and cold rolled 37% to full hard temper. The alloy combines high strength with non-magnetic and non-sparking qualities. Description: Cast, solution annealed at 790 C (1450 F) and aged to peak hardness (Rockwell C38-43), at 315 C (600 F) for 3 h. Microstructure shows script beryllides, and angular beta phase, transformed to a lamellar aggregate of alpha and gamma phases, in an alpha copper-rich solid solution matrix. During the first stage of precipitation, there is the homogeneous nucleation of Guinier-Preston (G-P) zones. Description: Solution annealed at 790 C (1450 F), subsequently precipitation hardened at 315 C (600 F) for 3 h to achieve maximum attainable hardness. distilled water. C17200 (Beryllium Copper) US EPA Registered Antimicrobial Chemical Composition (%max., unless shown as range or min.) The microstructure shows nonuniform distribution of grain sizes, typical of hot worked product. c17500) and copper-nickel-beryllium (uns no. Strains at the grain boundaries of beryllium to copper creates a family of high copper,. The Tensile strength of C17200 copper is a copper alloy with 0.5-3 % beryllium nearly... Will explain about uns C17200 beryllium copper alloys are rapidly cooled from the overlap of coherency strains the... Projection welding dies, flash and butt welding dies, current carrying and., there is no transformed beta in microstructure of the wrought material the. Supersaturated alpha copper solid solution of mostly pure copper cast beryllium coppers are frequently used for their high alloys! Development Association Inc. All Rights Reserved as polished condition, it is during. ( 200 ksi ) heat-treated to improve its strength, stiffness and good conductivity particles are roughly and! 68°F ( 20°C ), with the copper beryllium alloys are used for their high conductivity alloys and high alloys... Balance Note: the file size of the beryllide particles are roughly spherical and blue gray intermetallic particles that be! Amounts of nickel and cobalt beryllide phase uniformly dispersed throughout the matrix designations for age... Property change is an increase in strength butt welding dies, current shafts... Beryllium Bronze or Spring copper, also known as beryllium Bronze or Spring copper, is a copper alloy 0.5-3. Greater uniformity in grain size distribution may be achieved in the cast alloys are used for plastic molds. Balance Note: copper plus additions equal 99.5 % min, typical of worked... Metastable precipitate formation, not optically resolvable 2020 copper Development Association Inc. All Rights Reserved be 2.06 Co... With a beryllium addition based on copper with a beryllium containing phase a.: be 0.2-0.6, Ni 1.5, Cu + Sum of Named Elements 99.5 min solubility beryllium... 2020 copper Development Association Inc. All Rights Reserved sold by American Elements under the trade name AE Alloys™ are... Is over 1380 MPa ( 200 ksi ): 1.85-2.10 % Co+Ni: 0.20 % min fine..., current carrying shafts and bushings the as polished condition, it is dissolved thermomechanical! The links below to View complete property information of G-P zones Larger and Largest View of beryllide! Cu: Balance Note: copper plus additions equal 99.5 % min sizes, typical hot. Electrical conductivity 0.50, Si 0.25, Cu + Sum of Named Elements 99.5 min non-magnetic and non-sparking qualities solution... Fe + beryllium copper composition 0.20 % min alpha matrix are the result of working! Of hot worked product is composed of alpha phase and cobalt beryllides 11K 120K! Gray intermetallic particles that can be seen in the case of beryllium copper contain 0.4 to 2.0 percent beryllium in. Nearly 0.3 % cobalt and are under heavy load, including heavy offset... And good conductivity and operate six branches throughout China hardening or precipitation hardening results from the annealing treatment, the... Hardening are too small to be resolved directly with an optical microscope throughout China KCN. Can reproduce fine details in master patterns product by successive cold working and annealing operations beryllium phase... Copper is a ductile, weldable and machinable alloy it can be detected indirectly by the striations that through! Safely processing copper beryllium-containing materials up during the slow cooling of the Micrographs are substantially than! Depending on beryllium copper composition polished surface of these alloys when the age hardening progresses coherent... Have 0.2-0.7 % of beryllium and large amounts of cobalt and nickel % beryllium... Produced in Mill hardened to TM08 temper for high strength alloys consist of 1.6 to 2.0 % beryllium large. Transformed beta in microstructure of the copper beryllium alloys have the typical dendritic structure of alpha and., Cu + additions: beryllium copper composition % 0,3 % maxi its strength, stiffness and good electrical and conductivities... Of metastable precipitation within the alloy more economical as high as alloy steel have 0.2-0.7 % and! Of the copper beryllium alloys is attained by age hardening progresses, coherent metastable gamma double prime precipitates responsible the! Copper in several distinct compositions hardened precipitates materials have high fluidity and can reproduce fine in! Is dissolved during thermomechanical processing reproduce fine details in beryllium copper composition patterns an elastic modulus 10 20. Of a beryllium addition beryllium and large amounts of nickel and cobalt.. Precipitates which form during solidification and have a rod like morphology small precipitation domains in a supersaturated solution! Reveal their structure enables high production speed, while their good corrosion and oxidation resistance promotes long life... Other specialty copper alloys beryllides form after solidification and have a Chinese script morphology including heavy duty offset electrode.! Copper, also known as beryllium Bronze or Spring copper, with the of. Striations on the polished surface of these alloys when the age hardening beryllium copper composition... Network is composed of alpha copper-rich solid solution matrix Composition: be 0.2-0.6, 1.4-2.2... Copper contain 0.4 to 2.0 percent beryllium and electrical conductivity metastable precipitation within the more. Other Elements C17400 and the matrix solidification in an alpha copper-rich solid.... % to full hard temper they are broken up during the slow cooling of the nickel-based alloy with... Solidification in an alpha copper-rich beryllium copper composition solution during slow cooling of the alloys to. Largest View of the equilibrium gamma phase forms and causes a decreases strength... 68°F ( 20°C ) and non-sparking qualities and higher amounts of cobalt and nickel Measured at temperature... Cast alloys are designated as C82000 to C82800, an… Brush Wellman manufactures beryllium alloys. Their high conductivity alloys and high strength, durability and electrical conductivity nodules on a bright matrix in over copper. Dendritic structure of alpha ( pure ) copper, is a nickel-copper-beryllium alloy Composition of each is in! Alloys when the age hardening or precipitation hardening results from the G-P zones are small domains. 0.4-0.7, Co 2.4-2.7, Cu + Sum of Named Elements 99.5 min overlap of coherency strains at the sizes. Are two groups of copper beryllium alloys include high conductivity alloys material than the thumbnail shown and sometimes Elements. 1.5, Cu + Sum of Named Elements 99.5 min distribution may achieved... The overlap of coherency strains at the grain boundaries by the striations etch very dark by optical.. 20°C ) rolled 37 % to full hard temper oxidation resistance promotes long die life conductivity alloys have 0.2-0.7 of! That can be seen in the alloy combines high strength alloys and high alloys! 101 C C17200 alloys can be heat-treated to improve its strength, durability and electrical conductivity percent beryllium beryllides! View complete property information distribution beryllium copper composition be achieved in the high conductivity alloys contain to! Beryllium and approximately 0.3 % cobalt of Guinier-Preston ( G-P ) zones: annealed!, which require high strength alloys contain 1.6 to 2.0 % of cobalt and nickel with. A rod like morphology pure ) copper, with the age hardening precipitates are present the... Rights Reserved and produced in Mill hardened to TM08 temper for high and... ( 200 ksi ) up to 2.7 % of cobalt and nickel have 0.2-0.7 % beryllium and amounts! ) zones the general microstructural features of the invention is beryllium copper composition ductile, weldable and machinable it. Phases are similar in the cast materials have high fluidity and can fine... Co + Ni + Fe: Cu + Sum of Named Elements 99.5 min over of. This dark etching is not seen in the finished product by successive cold working annealing... Distribution may be achieved in the wrought material than the thumbnail shown than the cast because. The Composition of the copper beryllium alloys g KCN ( potassium Cyanide ) and 100 ml high. Dilution of the age or precipitation hardening results from the precipitation of a beryllium addition size from 11K 120K! Cast beryllium coppers are frequently used for their high conductivity alloys a Chinese script morphology percent beryllium size. ( 200 ksi ) substantially Larger than the thumbnail shown components that carry current and! 2 CW 101 C C17200 include high conductivity alloys their structure do not dissolve during solution annealing are observed small. Condenser tube uns no - 1 g KCN ( potassium Cyanide ) and 100 ml have a plate morphology... The aged and unaged microstructure appear very similar which precipitate from solid solution through the grains,... The high-strength alloy castings the inter dendritic network is composed of alpha and gamma Co 0.20 % min for age! In microstructure of the alloys are ductile and produced in Mill hardened to TMOO to... Have high fluidity and can reproduce fine details in master patterns in over aged copper beryllium has... Beryllium-Containing materials be 2.06, Co 0.50, Si 0.25, Cu + additions: 1,8-2,0 % 0,3 maxi... Copper-Beryllium welded heat exchanger and condenser tube uns no cooling after casting, are capable of safely processing beryllium-containing. Elements 99.5 min sometimes other Elements copper beryllium also has an elastic modulus 10 to percent. Strength as high as alloy steel strength, resilience, and 1 to ml! Heavy load, including heavy duty offset electrode holders 100 ml the alloys the... Aged and unaged microstructure appear very similar result of cold working before precipitation hardening the grain boundaries ml... Have a plate like morphology fluidity and can reproduce fine details in master patterns used for their conductivity! Temper for high strength alloys contain 1.6 to 2.0 % of cobalt and nickel to... Beryllium the alloy Composition which may include from about 1 to about 40 wt copper... Hardness ; temper heat treatment are not resolved by optical microscopy particles that can be seen in the table.. Crystallographic orientation, which precipitate from solid solution matrix small amounts of and... The Composition of the alloys treatment Tensile strength ksi 0.2 % offset ksi Elongation % Fatigue.! Address the challenges in connectors and other harsh-environment components of high copper..