Cupro-Nickel pipes made from CuNi 70/30 (C71500) is a high-performance alloy primarily used in marine and industrial applications where excellent corrosion resistance and durability are required. Below is a detailed overview of the specifications, properties, and equivalent grades for CuNi 70/30 pipess.CuNi 70/30 (C71500) pipes Specifications1. Material DescriptionMaterial: Cupro-Nickel (Copper-Nickel)Grade: CuNi 70/30Alloy Number: C715002. Chemical CompositionCopper (Cu): 70% minNickel (Ni): 30% minIron (Fe): Typically ? 1.0%Other Elements: May include small amounts of manganese, silicon, and others, typically ? 0.5% combined3. Mechanical PropertiesTensile Strength: 65-85 ksi (450-585 MPa)Yield Strength: 30 ksi (205 MPa) minElongation: 30% minHardness: Typically around 80 HRB (Rockwell B)4. Physical PropertiesDensity: Approximately 8.9 g/cm³Melting Point: Around 1,150°C (2,102°F)Thermal Conductivity: Approximately 40 W/m·KElectrical Conductivity: Around 15-25% IACS (International Annealed Copper Standard)5. DimensionsCuNi 70/30 pipess are available in various diameters and lengths. Common dimensions include:Diameter: Ranges from 6 mm to 200 mm or moreLength: Typically available in standard lengths of 3 meters to 6 meters, but can be customized based on requirements6. Standards and SpecificationsASTM B122: Standard Specification for Copper-Nickel-Silicon Alloy Plate, Sheet, and Strip for Marine ServiceASTM B466: Standard Specification for Copper-Nickel Alloy Seamless Pipe and TubeBS 2871: Specification for Copper and Copper Alloys for Wrought ProductsDIN 17665: Wrought Copper-Nickel Alloys7. Equivalent GradesUNS C71500: Standard designation for CuNi 70/30ISO 6820: International standard for Cupro-Nickel alloysJIS H3300: Japanese standard for Cupro-Nickel alloys8. ApplicationsCuNi 70/30 pipess are widely used in:Marine Environments: Shipbuilding, marine engineering componentsHeat Exchangers: Particularly effective in seawater applicationsDesalination Plants: Parts exposed to saline waterIndustrial Equipment: Components requiring superior corrosion resistance and strength9. Surface Finish and TreatmentSurface Finish: Available in various finishes including bright, polished, or as-rolled.Heat Treatment: Typically not heat-treated but may undergo stress relieving if required.10. Markingpipess should be marked with:Manufacturer’s Name or TrademarkMaterial Specification (e.g., CuNi 70/30, C71500)Dimensions (Diameter and Length)Standards Reference (e.g., ASTM B122, DIN 17665)11. Testing and Quality ControlChemical Analysis: To ensure compliance with the chemical composition requirements.Mechanical Testing: Includes tensile testing, hardness testing, and impact testing.Visual Inspection: To check for surface defects.SummaryCuNi 70/30 (C71500) pipes is a high-quality cupro-nickel alloy known for its excellent corrosion resistance, particularly in seawater and other harsh environments. It is used in a variety of applications including marine engineering and industrial equipment. Adhering to standards such as ASTM B122 and DIN 17665, and ensuring proper testing and quality control, guarantees that these pipess will perform reliably in their intended applications.