Copper alloys esfera. The solder wires meet J-STD-004B, ASTM B 32, and J-STD-006C. Copper alloys esfera

 
 The solder wires meet J-STD-004B, ASTM B 32, and J-STD-006CCopper alloys esfera  High purity copper is a soft, malleable, and ductile metal with high thermal and electrical conductivity

Satin and Mirror Finishes. People need copper in their diets. These property models are needed to simulate the mechanical behavior of structures with copper components. 20. API 572 section 8. 2°C, boiling point of 2567°C, specific gravity of 8. Copper alloys are metal alloys that have copper as their principal component. 1. There are more than 400 copper alloys, each with a unique combination of properties to suit many applications, manufacturing processes and environments. 6 to 2. 3. 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. The results show that alloying and heat treatment do change the colour of copper alloys; the colour of bronzes containing 18%-33% tin changed from gold-like to silver-like as the tin content. ASTM B62, 2017 Edition, April 1, 2017 - Standard Specification for Composition Bronze or Ounce Metal Castings. 9 Mil 1941 1000+. Copper was the first metal to be worked by man, along with gold and meteoritic iron. Alloy 10. Bronze is an alloy of tin and copper and brass is an alloy of. Yet its conductivity is only 28% that of pure copper. 260 Brass is a zinc-copper alloy with remarkable chemical properties – it has high corrosion and wear resistance, making it useful in applications such as machinery components, valve stems, ammunition casings, and musical instruments. Thick copper-covered steel wires exhibited a highly favorable tradeoff between the strength and electric conductivity as compared with the beryllium copper alloys. Brass, like copper, is a poor breeding ground for bacteria. Oxx. 4. Serves as a master alloy to add chrome to various copper alloys. Copper tin alloy (Bronze alloys) can be divided into two categories—high-tin bronzes, where the tin content is greater than 10%, and low-tin bronzes, where the tin content is between 0% and 10%. EPA as antimicrobial. 93 kg/dm 3 at 20 °C) varies only slightly with increasing nickel content (density of nickel at 20 °C = 8. com. The choice of these current alloys is related to the studies. Production of Alloy Powders. G. On the periodic chart, its atomic number is rated 29 with the. Chromium copper has excellent cold formability and good hot workability. The most common solder paste powder sizes for SMT are type 3 (T3), type 4 (T4), and type 5 (T5). Additional information is available upon request. Copper alloys are made of a copper matrix and a combination of single alloying elements in n-ary forms. In the as cast form it is called electrolytic tough pitch (ETP) copper. 05 mpy (0. 3%. , GRCop-84, which contains 8 at. The high-copper alloy class therefore comprises alloys that do not belong to one of the other copper alloy classes. 3. A wide variety of copper alloys are available for use in construction. Brass (copper-zinc alloys) Brasses are copper alloys with 5-45 % zinc. The. These metals have high conductivity, exceptionally high ductility, low gas permeability, freedom from hydrogen embrittlement and low outgassing in a vacuum. Industrial Metals. 4989. Locations Distributor* $50 - 99. Arc Welding. Although 70-30 Cu-Ni is essentially non-magnetic, 90-10 Cu-Ni has a. 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. Base metals are more common and more readily extracted than precious metals, which include gold, silver, platinum, and palladium. S. 09. CDA's website is an excellent resource for information about copper, copper alloys, and their many uses and benefits. $14. It's strong, weatherproof, and relatively inexpensive. Copper Alloys. 001 mm/y), within those velocities that each alloy can tolerate without damage to the protective corrosion product film. BBB Directory of Copper near Victoria, BC. Laboratory testing shows that, when cleaned regularly, EPA-registered antimicrobial copper alloy surfaces kill greater than 99. The age-hardening behavior is based on the fact that the solubility of Cd, Be, and Cr in Cu decreases with decreasing temperature. 3 weight percent (and therefore designated as "coppers"), albeit only a handful are used industrially as electrical conductors. 08. Over the following decade, the International Copper Research Association (INCRA - now the. Alloying produces a metal harder than either copper or zinc individually. This Standard includes: (a) pressure-temperature ratingsPublisher Summary. 887 products. 5 and 1. This specification 2 establishes requirements for an alloy having a composition of copper, tin, lead, and zinc, used for component castings of valves, flanges, and fittings. It is a form of bronze with a higher tin content, usually in approximately a 4:1 ratio of copper to tin (typically, 78% copper, 22% tin by mass). The oral bioaccessibility of copper alloys and pure metals was assessed using in vitro methods with synthetic saliva and gastric fluid. It can be coupled to tin and aluminum bronze. Low Alloy Steels 1382 - 1529 Stainless Steels 1375 - 1450 Non-ferrous Aluminium Alloys 475 - 677 Copper Alloys 982 - 1082 Lead Alloys 322 - 328 Magnesium Alloys 447 - 649 Nickel Alloys 1435 - 1466 Titanium Alloys 1477 - 1682 Zinc Alloys 375 - 492 Ceramics Glasses Borosilicate Glass (*) 450 - 602Most copper alloys are produced to a series of cold-rolled tempers with a tensile strength range unique to each alloy and temper designation. These properties make copper extremely suitable for tube forming, wire drawing, spinning and deep drawing. 7 introduces another new DM: hydriding of titanium alloys. 22): C ≜ Q + V. Lancaster, in Metallurgy of Welding (Sixth Edition), 1999 10. BERYLLIUM COPPER ALLOYS ( Alloy 174 ) C17410-Alloy 174 is a mill hardened alloy. 2-2. 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. These properties make copper extremely suitable for tube forming, wire drawing, spinning and deep drawing. coinage. Sipi Copper Alloys offers a one-stop-shopping for master alloys and pure metals needed in these applications, including the technical expertise to select the right additives to meet the customer’s precise objectives. S. If the conductivity of copper-30% zinc. EPA as antimicrobial. Both the high strength and the high conductivity Performance Alloys copper beryllium alloys are available in several wrought forms (e. Brass and bronze, two commonly used alloys, are created when copper is combined with other metals. depending on alloy type, water chemistry, contaminants, oxygen content, pH value, microbial activity, temperature, flow rate, duration of exposure etc. 1/8″ – 9″ diameter. Fig. 12. The most conductive of our metals, it excels in all types of electrical applications. % Ag-0. It is used for plumbing fixtures, musical instruments, and decorative items. MetalTek specializes in bronze alloys and does not typically cast purely brass alloys. UK pound coins. G. 1. 15: Nickel, solid or plated, titanium and alloys & Monel: 0. In both media, migrations are higher for lead than for other metals. Alpha–beta aluminum bronzes are heat treatable. Above 15% Zn, dezincification may occur. 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. Specific Heat Capacity Btu/ lb /°F at 68°F. 1. High strength beryllium copper alloys contain 0. The standard length for red brass pipe is 12 feet. 6% aluminium,. Working and finishing techniques, alloy families, coloration and other attributes are addressed, illustrating that copper and its alloys are so adaptable that they can be used in a multitude of applications in almost every industry, from door handles to electrical circuitry to heat exchangers. 3. It offers 100% IACS minimum conductivity, making it popular for electrical applications and those necessitating low resistance levels. Master alloys are known as semi-finished products or base metals that include copper, nickel or aluminum combined with a higher percentage of one or two of other elements. More machinable than copper and bronze for making nuts, hinges, and locks. The common trade name of this alloy is 85-5-5-5; the correct. Touch Surface. 4989. High purity copper is a soft, malleable, and ductile metal with high thermal and electrical conductivity. As the PCA biplot on the ICP-OES quantitative data shows (Fig. The MRSA "superbug" is a virulent bacterium resistant to broad spectrum antibiotics and, therefore, very difficult to treat. 2 μm. Details of of copper alloy compositions are given in the Appendix. Kushal Copper Corporation. Metals which have a designated minimum copper content of 99. 6 kg of CO2 for each kilogram of metal. 02mm/yr decreasing with time as the protective surface films mature . Because of the addition of the sulfur, 303 alloy has improved machinability compared to 304 alloy. 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. Thus, when brass is said to have 28% IACS, it denotes an electrical conductivity 28% of that standard. It combines the properties of two metals to form an exceptionally strong and durable material suitable for. 11000. Photo: A padlock whose main body (the gold part at the bottom) is made of brass, a tough alloy of copper and zinc. Coefficient of Thermal Expansion 68-392 10 to -6 power per °F (68 – 392°F) 10. Pure copper has good electrical and thermal conductivity. For example, the alloy NiCr 70/30, also designated as Ni70Cr30, Nikrothal 70, Resistohm 70, and X30H70 has a melting point of 1380 o C and an electrical resistivity of 1. Silver Plating of C182 (Chromium) Copper Chromium copper is alloyed with a small percentage of chromium (~ 0. The modern name copper first came into use around 1530. Form. In 2011, the corrosion and biofouling performance of 11 copper alloys produced by several manufacturers in the United States, Germany and Japan was evaluated in a 12-month. It is not a specification of copper and copper alloys. BBB Start with Trust ®. Copper Alloys Search - Basic; Copper Alloys Search - Advanced; Properties of Copper; Low Temperature Properties of Copper; Cryogenic Properties of Copper; Copper Compounds; Microstructures of. 35: Brass and bronzes: 0. 5. 17). The Copper Development Association Inc. B164-03(2019) Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire . There are approximately 370 commercial copper and copper-alloy compositions. Bell metal is a hard alloy used for making bells and related instruments, such as cymbals. 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. In the designation system, numbers from C10000 through C79999 denote wrought alloys. The alloys are used in aircraft and aerospace applications, as well as in high-performance sporting goods. 8: Copper-Base Alloy - C22000 (Commercial bronze, 90%) 10. It offers high conductivity, good ductivity and strength. Cast alloys are numbered from C80000 through C99999. Bronzes. The best-known. ["IACS" is the International Annealed Copper Standard]. Source: CDA, Copper Tube Handbook. The common cold-rolled temper names and designations are: Annealed. 0 mpy (0. Copper is soft but tough. 2. Amalgam is a metal alloy of which one of the elements is mercury (Hg). Pure copper has the best electrical and thermal conductivity of any commercial metal. One of the most useful alloys is the 70%Cu and 30% Zn alloy is famed for its deep-drawing ability. From: Encyclopedia of Materials: Science and Technology, 2001. The as-received copper alloys were processed by solution treatment, water quenching, cold-drawing and ageing treatment successively. The connector designer will approach each new assignment with information on a. Properties of Copper Powder. 5 mm x 20 mm x 20 mm were. 300 mm in length. 13mm – 70mm A/F. Gold from the richest grave in the cemetery at the 5th millennium site of Varna, Bulgaria. Alloy C18000, another member of the group, contains nickel,. Serves as a master alloy to add chrome to various copper alloys. Antimicrobial Copper Alloys - Group I are not approved for direct food contact or food packaging uses. 13 Chrome L80, UNS S42000, is a quenched and tempered martensitic stainless steel used for corrosion resistance in sweet (CO 2) and mildly sour (H 2 S) environments up to 300°F. An alloy is a material made by melting one or more metals together with other elements. 18- and 9-carat gold alloys are commonly. Copper alloys There is a large number of copper alloys, with zinc (brass) and tin (bronze) being the most common. (Thermo; Experimental) Google Scholar. Of the various brasses, the most important for connectors are those containing 15 and 30% zinc, although a 5% zinc version is occasionally considered. Zinc die casting alloys: >78% Zn by weight, it usually contains small amounts (less than a few. * = alloys registered with U. Copper is a major metal and an essential element used by man. 2024 aluminum alloy is of the 2xxx series, which include alloys that use copper as their principal alloying component. 2 Fracture Toughness 673 4. Simply put, cast brass has too large of a grain structure and lacks. In contrast to the red brasses, which are. Solder Paste Sizes for SMT Printing. Free shipping on many items | Browse your favorite brands. Size Range. 025 mm/y); for copper-nickel, the most resistant alloys approach 0. Main alloying elements in CuCrZr alloy were 0. 8) and a brass (HB: Cu–Al 4 –Zn 25 –Fe 3 –Mn 3. 22mm – 3″ square. B872-19 Standard Specification for Precipitation-Hardening Nickel Alloys Plate, Sheet, and Strip . 4. An improved performance super high strength copper nickel alloy for use in offshore oil and gas and other marine environments, Tuck, C. Basic modern brass is 67% copper and 33% zinc. These other alloys are types with higher silver. All copper beryllium alloys are readily machinable using conventional processes and the guidelines provided in this brochure. The most important commercial Copper Alloys are those with a content ratio 90/10 Copper Nickel and 70/30 Copper Nickel. Copper is a tough, ductile and malleable material. The property of the alloy varies as the zinc percentage changes. 8 –Ni 2 –Mn 0. Aesthetics crucial factor in development of earliest copper alloys. comOFHC Copper (CDA 10200) OFHC copper has 99. Copper alloy surfaces have intrinsic properties to destroy a wide range of microorganisms. For gearing, 303 stainless is typically used. These fittings shall be produced to meet the general requirements of ASTM B 62, Alloy C83600 or the chemical and. It is found in ore deposits around the world. depending on alloy type, water chemistry, contaminants, oxygen content, pH value, microbial activity, temperature, flow rate, duration of exposure etc. , non-oxidizing atmosphere. C100 – series with Copper contains. If the copper-lead alloys do not have sufficient load-carrying capacity, the lead content is reduced, and tin is added to improve the strength. Li,1 B. 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. CDA's website is an excellent resource for information about copper, copper alloys, and their many uses and benefits. Group II alloys alloys that have an intermediate fr eezing range, that is, a freezing range of 50 to 110 °C between the liquidus and the solidus curves. Both of these are imprecise terms, having both been commonly referred to as lattens in the past. As solid solution alloys, the 90-10 and 70-30 alloys cannot be age hardened. Copper beryllium (Cu-Be) alloys are the most efficient system due to their exceptional combination of high strength, good electrical and thermal conductivity, good. The long-term, steady-state corrosion rate for copper and copper alloys, except for Muntz metal, is on the order of 1 mpy (0. Chiche, “The Standard Thermodynamic Properties of the Oxides of Copper. whole length and with a uniform wall thickness. Copper Alloys. Copper’s superior conductivity allows smaller conductors to be used, saving. A Reference Material is defined as:Copper Alloys. Incipient Melting °F. 4 Fatigue and Creep–Fatigue 674 4. Copper alloys are made by mixing copper with one or more other metals to produce a new material that combines some of their best properties. Note that the temperature (noted ∆T) is the difference between the ambient laboratory air temperature (equal to 22°C) and theCopper Alloys Search - Basic. Copper alloys and copper matrix composites have been attracting a lot of attention lately. See moreWorking and finishing techniques, alloy families, coloration and other attributes are addressed, illustrating that copper and its alloys are so adaptable that they can be used. IBC's Copper Alloys Division manufactures and distributes a variety of copper alloys as castings and forgings, including beryllium copper, chrome copper, and aluminum bronze. 6. Brass - Alloyed with Zinc. 3-cm OD by 0. Also, in the. Material Groups. The initial brown-black appearance is attributed to semiconducting properties of cuprite (Cu 2 O) and fully attained at thickness 0. Copper also forms an important series of alloys with aluminum, called aluminum bronzes. The mentioned alloys show a Cu content of above 96% for wrought alloys and 94% for cast alloys. Brass, for example, is a substitution alloy based on copper in which atoms of zinc replace 10–35 percent of the atoms that would normally be in copper. 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. * = alloys registered with U. Bronze is another copper alloy, but with tin. copper-alloys including GRCop-84, GRCop-42, C-18150, and C-18200 under NASA, industry, and combined funding1. Also, please take a look at the list of 19 copper alloy manufacturers and their company rankings. 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. Rhodium plated on silver-plated copper: 0. Nominal Composition. These alloys are then used to manufacture a variety of products in different industries. 3. Different types of bronze have varying proportions of these ingredients. These alloys are available in different shapes such as waffle plate, rod in coils, and ingot. If there is a higher percentage of copper, there. This chapter provides an overview of copper and copper–nickel alloys. Size Range. 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. In 303 alloy, the chromium content is reduced to 17%, and 1% of the alloy is sulfur. coli O157 at both temperatures, and the lowest copper content to eliminate E. Laboratory testing shows that, when cleaned regularly, EPA-registered antimicrobial copper alloy surfaces kill greater than 99. S. Tin bronzes are stronger and more ductile than red and semi red brasses. 5 Irradiation Effects in Copper and Copper Alloys 675 4. The first material to solidify is almost pure copper, as the dendrites continue to solidify they become a mixture of copper and zinc. 3% or higher. 03% O2, and less than 50 ppm metallic impurities. In fact, copper alloys become stronger and more ductile as the temperature goes down, retaining excellent impact resistance to 20 K (-253 C or -424 F). Malleability and Ductility – copper is easy to work with, mainly when it comes to fabricating and joining. strength copper-beryllium alloys and the high-conductivity copper-beryllium alloys are detailed in the following sections. Introduction. 6 Recycle of copper and copper alloy scrap. C10300. , 234, 830–832 (1952). A Copper (Cu) Alloy containing Chromium (Cr) used for their high strength and corrosion resistance. Hiduminium or R. copper in the range of 0. The best known traditional types are bronze, where tin is a significant addition, and brass, using zinc instead. Commonly used as downhole tubular components, packers, and other subsurface equipment, it is included in API 5CT as Group 2, Grade L80, Type 13Cr. Copper Tin Alloy Properties. 6. 2. Copper alloys are metal alloys that have copper as their principal component. Copper and its alloys represent 6 - 9% by weight (or approximately 50 - 55 lb, 23-25 kg) of the content of a typical automobile. International Annealed Copper Standard: 100% give 5. The graphite particle–matrix interface did not show any enhanced susceptibility to corrosion. Alloy C18000, another member of the group, contains nickel,. Arsenical copper Beryllium copper (beryllium) Billon (silver) Brass (zinc) Calamine brass (zinc) Chinese silver (zinc) Dutch metal (zinc) Gilding metal (zinc) Muntz metal (zinc) Pinchbeck (zinc) Prince's metal (zinc) Tombac (zinc) In general, copper alloy shows weight loss, whereas copper-alloy graphite composites show weight gain when subjected to 17-day Australian test solution (according to the Standards Association of Australia Code of Practice C316-1970). 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. Cold-rolled copper products—including sheets, coils, rods, bars, and some plates—are produced with an “as fabricated” finish. Different types of Copper/Silver Alloys. 10g – 21g. Generally Al-brass heat exchangers are preferred subject to a FeSO 4. Pitting - Pits are discrete sites of corrosion at areas where the protective surface film is damaged or breaks down. Copper zinc alloys are single phase up to about 37% zinc in the wrought condition. The best known traditional types are bronze, where tin is a significant addition, and brass, using zinc instead. 1 Tensile Properties 671 4. Copper alloy C22000 (commonly known as Commercial Bronze) is a popular architectural metal and was chosen for the 18-ft-high bronze panels in the Ohio Holocaust and Liberators Memorial by Daniel Libeskind. EPA as antimicrobial. 025 mm/y) or less, and for the copper-nickel alloys on the order of 0. 1 ). Laser cladding owns many advantages, such as high instantaneous heating temperature, fast cooling speed, metallurgical bonding between the coating and the substrate, small heat-affected zone and so on. 24-carat is pure gold, but it is very soft. Copper beryllium alloys are used for their high strength and good electrical and thermal conductivities. It is malleable, ductile, and a good conductor of electricity and heat. As copper has a high solubility for zinc, the alloys are very homogenous. In order to uncover such information, we apply active learning and generate. To determine the capacitance, we invoke the definition (Section 5. By contrast, the recycling of aluminum requires only 2. 4% P are wrought alloys known as phosphor bronzes. Intended primarily for use on outdoor architectural metal work, it preserves the natural colors of copper and its alloys for long periods (1. Copper is a major metal and an essential element used by man. Antimicrobial. * = alloys registered with U. Copper. Interstitial alloys. Copper is a ductile and malleable base metal that is valued for its high thermal and electrical conductivity. 3% and 96%. Copper and its relevant species, such as oxides and many alloys, have been recognised as potential antibacterial surfaces. 95% minimum copper (silver counted as copper) and is produced by converting cathodes in a continuous casting and rolling process into copper rod. Serves as a master alloy to add chrome to various copper alloys. Figure 3. It is also the oldest metal known to man and was first discovered and used about 10,000 years ago. They can occur in copper alloys by surface contamination or. Nominal Composition. Copper and Copper Alloys Published: May 2014 Includes standards on copper and copper alloy plate, sheet, strip, rolled bar, rod bar, and shapes. Copper and its alloys exhibit exceptional corrosion resistance to moisture, saltwater, and a variety of chemicals. 5% nickel, 11% cobalt, and 2% silver. 2014 Print $258 2014 CD ROM (Single user) $258 Order Online Access (Unlimited users) $610 Volume 02. Due to its effectiveness as an electrical conductor, copper is now most. If simple bends are required but strength is also important, H02 (half hard) will be the best temper to use. 78 wt% Cr and 0. The C19210 (F) alloy presents a low resistance in comparison with the other copper alloys used. 5Ag (wt-%) alloy, by adding Zr to a ratio of Cu–3Ag–0. CDA offers a wide array of useful resources for the professional. The high. A freshly exposed surface of pure copper has a reddish-orange color. Abstract. Using Cu–1. 6 Pipe/Tube 2 REFERENCES A hollow wrought product of uniform cross- The Indian Standards listed in Annex A are section with only one enclosed void along its necessary adjuncts to this standard. It has high strength, good toughness, and excellent fatigue resistance. This metal’s hygienic properties make it useful to slow down the growth of bacteria like E-coli, legionella and. Standards: ASTM B-66, ASTM B-271, ASTM B-505, ASTM B-584, SAE 461, SAE J461, SAE J462, SAE660, DIN 2. Stainless Steel: another iron alloy, which typically contains chromium, nickel, and other elements to resist rust or corrosion. Forms: 2-20 Ingot. 001 mm/y), within those velocities that each alloy can tolerate without damage to the protective corrosion product film. The higher the lead content of the alloy the more lead globules present in the structure. Alloying produces a metal harder than either copper or zinc individually. 1. We offer this material in Ingot, shot, and cut pieces. 001 mm/y). II. Good corrosion resistance. ,”. Spinning. Modulus of Elasticity in Tension ksi. Aluminum Bronzes. 2011, com o número de Projeto ABNT NBR 15827. Distributor of copper alloys in foil, bar, rod, tube, sheet, and wire forms. Their composition design, preparation, and processing directly affect the final performance. Copper alloys are metal alloys that have copper as their principal component. Bronze - Alloyed with Tin. Effect of Quenching Temperature on the Electrical Resistance of Mangan-ese-Copper Alloys 30 Fig. Whilst 70/30 has greater salt water resistance and strength, 90/10 is more common as it is less expensive with overall good properties for a range of applications.