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Designed by students from the sophomore art department of the French Academy of Arts in Provence, they produced a self-propelled solar energy washing machine using materials such as bicycle wheels, bamboo, wooden blocks, solar panels, and an electric motor. The design can be used by local people in power-hungry areas around the world to help with washing machines, using renewable energy functions. These materials can be found everywhere.
There are more than 10 grades of 3.6,4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9 in the performance grades of bolts for Steel Structure Connection, the bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and heat-treated (quenched and tempered) , commonly known as high-strength Bolts, the rest are commonly known as ordinary bolts. Bolt performance grade label has two parts of digital composition, respectively, the nominal tensile strength of bolt material and yield strength ratio. For example,
Performance grade 4.6 bolt, the meaning is: 1, Bolt Material Nominal tensile strength up to 400MPa class, 2, bolt material yield strength ratio is 0.6; 3. The nominal yield strength of bolt material is 400 × 0.6 = 240mpa performance grade 10.9, the material after heat treatment can reach: 1. The nominal tensile strength of Bolt Material is 1000MPa; 2. The yield strength ratio of bolt material is 0.9.3. The nominal yield strength of bolt material is 1000 × 0.9 = 900MPA. The meaning of the performance grade of bolt is the international standard, its performance is the same, the design can only choose the performance grade. The so-called strength grade 8.8 and 10.9 means that the shear stress grade of the bolt is 8.8 GPA and 10.9 GPA8.8 nominal tensile strength 800N/MM2 nominal yield strength 640N/MM2, x * 100 = The tensile strength of the Bolt, x * 100 * (y/10) = the yield strength of the bolt (because according to the designation: Yield strength/tensile strength = y/10) as grade 4.8 then the tensile strength of the Bolt is: 400 MPA yield strength: 400 * 8/10 = 320 MPA
Stainless Nuts And Bolts,Hardened Bolts,Hex Flange Bolt,M10 Stainless Steel Bolts
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