题目内容
When Q345 steel is used for welding components, the type of electrode used shall be .
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Grade 1 and Grade 2 welds require a certain amount of ultrasonic inspection, and the detection rate of Grade 1 welds is and the detection rate of Grade 2 welds is 20%.
When calculating the tensile strength of the Grade 3 butt weld, the design value of the tensile strength takes of that of the base material.
In order to enable the weld to have a certain bearing capacity, the calculated length of the side fillet weld or the front fillet weld shall not be less than and 40 mm, and the calculated length of the weld equals to the weld length after deducting the length of arc initiation and arc retracting.
Test results indicated that the failure of the fillet weld often occur in the weld throat, so the effective thickness of fillet weld he is picked up which is along the direction of , and the effective area is the product of the effective thickness and the weld calculation length.
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