The weldability of a515 gr.70 structural quality carbon steel is good. It means that under certain process and construction conditions, a515 gr.70 structural quality carbon steel can obtain good performance after welding. Weldability is a measure of the h
The weldability of a515 gr.70 structural quality carbon steel is good. It means that under certain process and construction conditions, a515 gr.70 structural quality carbon steel can obtain good performance after welding. Weldability is a measure of the hot workability of steel. Weldability can be divided into weldability in construction and weldability in use. Weldability in construction refers to the sensitivity of cracking in weld metal and near seam zone, and hardening sensitivity of steel in near seam zone. Good weldability means that under certain welding process conditions, the weld metal and steel near the seam do not produce cracks. Weldability in use means that the mechanical properties of weld and HAZ steel are not lower than those of base metal.
On March 19, 2020 the us international trade commission (ITC) vote on imports from China and India's carbon alloy a515 gr.70 structural quality carbon steel steel screw (Carbon and Alloy Steel Threaded Rod) to make a positive final anti-dumping and anti-subsidy industry damage. All five members of the international trade commission voted in favor of the ruling. The us department of commerce will issue anti-dumping and countervailing duty orders on imports of a515 gr.70 structural quality carbon steel carbon alloy steel screws from China and India, according to the itc's affirmative ruling.
Heat treatment is a very important process to improve the performance of a515 gr.70 structural quality carbon steel etc. metal materials. The process of heating, heat preservation and cooling the steel in solid state to obtain the required structure and properties.
ASTM A514 steel is mainly used in places where high tensile strength and high yield are required, such as engineering vehicle lifting gears, large excavators, offshore platforms, etc. Different grades of A514 steel plate have different thickness, chemical composition and properties. However, the a515 gr.70 structural quality carbon steel mechanical properties specified in ASTM A514 are similar to those of Q690 in China. A514 grade Q is generally used as the rack for offshore platform. Its hardness is between 230-390MPa, yield is greater than 630MPa, and tensile strength is more than 700MPa.
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