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Product description: Item: TC4 Titanium Bolt GR5 Countersunk Flat Head Hex Socket Screws M2.5 M3 M4 M5 M6 Material: Titanium(TC4/Gr5) Type: Socket Screw Head Type: Socket Cap Head System of Mearsurement: Metric Dia./Thread Size: M2.5-0.45, M3-0.5, M4-0.7, M5-0.8, M6-1.0 Screw Length: 4mm~50mm(including head) Features: Titanium alloys have a series of advantages such as high specific strength, good thermal strength, and corrosion resistance. Therefore, they are increasingly used in industrial sectors such as aviation and aerospace, and are used to make main components in aircraft and engines. In engines, it is used to manufacture important parts such as compressor disks, compressor blades, casings and combustion chamber casings; in aircraft structures, it is used to manufacture important components such as wing spars, bulkheads and joints. The composition of titanium alloy TC4 material is Ti-6Al-4V, which belongs to (a+b) type titanium alloy and has good comprehensive mechanical and mechanical properties. Advantage 1: Large specific strength. The strength of TC4 is sb=1,012MPa, the density is g=4.4×103, and the specific strength is sb/g=23.5 (the specific strength of alloy steel is less than 18) Advantage 2: Titanium alloy has low thermal conductivity. The thermal conductivity of titanium alloy is 1/5 of iron and 1/10 of aluminum. The thermal conductivity of TC4 is I=7.955W/m*K ●TC4 thermal expansion coefficient: TC4 titanium alloy has a series of advantages such as excellent corrosion resistance, small density, high specific strength, good toughness and weldability, and has been successfully used in aerospace, petrochemical, shipbuilding, automobile, medicine and other sectors. ●Mechanical properties of TC4 titanium alloy: Tensile strength ob/MPa≥895, specified residual elongation stress or0.2/MPa≥825, elongation 85(%)≥10, reduction of area (%)≥25. ●TC4 titanium alloy density: 4.5(g/cm3) Working temperature -100~550(℃). ●Chemical composition of TC4 titanium alloy: TC4 contains titanium (Ti) balance, iron (Fe) ≤ 0.30, carbon (C) ≤ 0.10, nitrogen (N) ≤ 0.05, hydrogen (H) ≤ 0.015, oxygen (O) ≤ 0.20, aluminum (A1) 5.5~ 6.8, vanadium (V) 3.5~4.5. About us Payment Contact us Guarantee About item About us ● Hello Dear Customer: we have been engaged in online sales of hardware fasteners for more than 10 years, if you need a large number of or customized hardware products, please contact us, we can provide good prices and better service. ● All products in our store are elaborately made. Please feel free to buy. ● If you are satisfied with the products, I expect you can leave us positive feedback. ● If you have any problems or be not satisfied with them, please feel free to contact us, we will reply to you within 24 hours. Payment ● We accept multiple payment methods supported by the platform. ● We only accept your Ebay Address, Please Make sure it's 100% right. ● The items you ordered will be shipped out in 2 business days by Air Mail when your payment is clear. Contact us ● We care about our valued buyers, if you have any questions, our Customer Service staff will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to the high volume of daily incoming emails and time zone difference, we may not be able to reply to your emails immediately. Please allow 12 business hours for us to respond. Guarantee ● Good quality. Buy with confidence! ● If you are not satisfied when you receive your item, please return it within 7 days for a replacement or money back. Please contact me before you return it. ● Full refund after we receive our original item, Note: Return shipping is to be paid by the Buyer. ● We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately before you give us neutral or negative feedback, so that we can satisfactorily address your concerns. About item ● For the functional products in our shop, we make sure that the functions are the same as the description. ● About the product colour:Because of the different light and environment when the product is photographed, In a few instances the colour of the product may have a little colour difference with the actual colour of the product, I hope you can understand.