High strength structual bolts has a large bolt head and nut as it is designed to withstand full tensioning. 8.8/s high strength structural bolts fully tensioned bolts that are used snug tight, 8.8/tf high strength structural bolts full tensioned friction type joint, 8.8/tb high strength structural bolts fully tensioned bearing type joint,
Nov 03, 2014 · don’t let the melting aluminum interfere with the weld pool; this will cause porosity. you can weld aluminized tubing with gas metal arc welding (gmaw) using er70-s6 mild steel filler metal and 75 percent argon/25 percent oxygen shielding gas, but this will leave the finished weld zone unprotected because the aluminum will be burned away.
For metric bolts strength is according iso 898 mechanical properties of fasteners made of carbon steel and alloy steel described by "property classes" with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9.
High-strength gr. 8.8 gr.10.9, gr.12.9 astm a325,a490 heavy hex bolt. heavy hex structural bolts are designed for steel-to-steel structural connections. consequently, they are typically very short. the a325 and a490 specifications are not intended for general applications, including anchor bolts.
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