Magnetic tape was first used to record computer data in 1951 on the Eckert-Mauchly UNIVAC I. Phosphor Bronze Overview. For information on other products, consult our Stay up to date on industry news and trends, product announcements and the latest innovations.We are using the power of our platform to aid in the mass shortage of critical supplies. While not a standout alloy in any one of these categories, its ability to be both resistant, strong, and conductive means electrical components made from phosphor bronze will last longer than copper analogs. All Rights Reserved. Thomas uses cookies to ensure that we give you the best experience on our website. Copyright© 2020 Thomas Publishing Company. Of the eight tracks, six were data, one was a parity track, and one was a clock, or timing track. This standard material is given a machinability score of 100%, meaning it is easy to machine and causes little problems in the shop. Phosphor bronze alloys such as C52100, also known as C521, consist of copper with 0.50–11.00% of tin and 0.01–0.35% phosphorus. The main benefits of Phosphor Bronze are that is has a good resistance to cold and corrosion, (approaching that of Aluminium Bronze) as well as both an excellent mechanical strength and high fatigue strength. Request a quick quote and we'll try to get it. If it sounds attractive to your application, be sure to contact your supplier, as they will have the newest alloys available.This article presented a brief summary of the properties, strength, and applications of phosphor bronze. Phosphor Bronze Overview. They are also resistant to fatigue, meaning they retain their strength over many cycles of loading. The phosphorus increases the wear resistance and stiffness of the alloy. Below, in Figure 1, is a qualitative chart depicting the composition of phosphor bronze:From examining Figure 1, it may be difficult to understand why phosphor bronze is named as such when it is mainly an alloy of copper and tin. Single values represent maximums.Mechanical Properties according to ASTM B139/B139M-12(2017) Phosphor Bronze (also known as tin bronze or phos bronze) is an alloy of copper, tin and phosphorous. Phosphor bronze alloys such as C52100, also known as C521, consist of copper with 0.50â11.00% of tin and 0.01â0.35% phosphorus. This is because it only takes a small percentage of phosphorus, around 0.03-0.035% by weight, to imbue these alloys with unique properties such as improved flow, wear resistance, and stiffness. A phosphor bronze, alloy C519 has 6% nominal tin producing higher mechanical strengths with a slight decrease in electrical conductivity when compared to C510 phosphor bronze. The phosphor bronzes contain between 0.5 and 11% tin and 0.01 to 0.35 % phosphorous. Most alloys form an attractive patina in the presence of oxygen and are therefore also useful for decorative applications. This section will briefly explain each property and show how they make this copper alloy unique.Tensile yield strength is a stress value that determines the point after which the material will plastically deform. So, while most phosphor bronze alloys are somewhat difficult to mill, this issue can be addressed with the right alloy selection.Phosphor bronze has been used for many years in electrical components, but it is still finding new uses thanks to technological advances and the demand for more specialized materials. For reference, the Rockwell B hardness of copper is around 50, so it is clear from Table 1 that phosphor bronze is more scratch-resistant than its pure form. Phosphor bronze has an impressive yield strength, matching some Modulus of elasticity, or Young's modulus, describes the ability of a material to elastically deform- that is, how stiff a material is. Phosphor bronze is a member of the family of copper alloys.It is composed of copper that is alloyed with 0.5–11% of tin and 0.01–0.35% phosphorus, and may contain other elements to confer specific properties (e.g. Further increasing the phosphorus content leads to formation of a very hard compound Cu The dust and fumes of phosphor bronze are also toxic when inhaled, so be wary of both your wallet and your lungs.Table 1, below, shows some mechanical properties relevant to phosphor bronze’s uses and strengths. The phosphorous increases the wear resistance and stiffness of the alloy. Phosphor Bronze Alloy Material Safety Data Sheet PROPERTY VALUE Appearance Bronze Odor None Molecular Weight Not Applicable - Mixture Physical State Solid pH Not Applicable Vapor Pressure (mm Hg) Not Applicable Vapor Density (air =1) Not Applicable Solubility in Water (20 0C) Negligible Volatiles, Percent by Volume Not Applicable C 510 Phosphor Bronze – Grade A is a Morgan standard alloy and finds use in electrical applications, as well as fasteners and industrial applications. These alloys are notable for their toughness, strength, low coefficient of friction, and fine grain.Chemical Composition according to ASTM B139/B139M-12(2017)Note: Cu + Sum of Named Elements, 99.5% min. The main benefits of Phosphor Bronze are that is has a good resistance to cold and corrosion, (approaching that of Aluminium Bronze) as well as both an excellent mechanical strength and high fatigue strength. This causes phosphor bronze to be both useful for shaping operations and more difficult to machine, but more on this in a bit.The electrical conductivity of phosphor bronze is about 15% that of pure copper – so why use it in electrical applications when copper is better able to carry electricity? Phosphor bronze’s main disadvantages can be its lower electrical conductivity, as phosphorus will reduce the ability of the metal to conduct current, and its price tag. A high Youngs modulus, therefore, means a generally strong material as it will not plastically deform under increasing loading conditions. Phosphor Bronze Machining A Guide to Phosphor Bronze CNC Machined Parts: Properties, Applications and Design Considerations What is Phosphor Bronze? The answer lies in phosphor bronze’s good balance of fatigue strength, corrosion resistance, and electrical conductivity. It may be helpful to review our article on the types of bronzes, so as to understand the commonalities between copper alloys and their popular applications. Phosphor bronze comes in a wide array of standard alloys, including nonferrous spring alloys, free-machining phosphor bronze and bearing bronze.
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