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The main factors affecting the toughness of the weld for AH36 Steel are: the chemical composition of the base metal, the plate thickness, the welding method of AH36 Steel, the welding material and the welding process, etc. After they are selected, the welding process of AH36 Steel is the main aspect that affects the toughness of the weld for AH36 Steel. When the welding heat input is increased, coarse grain boundary ferrite is formed in the weld, thereby reducing the toughness of the weld for AH36 Steel.
The toughness of the welding heat-affected zone is not adjusted and improved by adding trace elements like the weld for AH36 Steel, but is inherent in the base metal itself, which can only be improved within a certain range through some technological measures, such as using post-weld Heat treatment, reasonable selection of welding process parameters for AH36 Steel, etc. When the heat input is too large, the grains in the welding heat-affected zone will be coarsened and coarse austenite will be formed. At the same time, there will be a superheated zone with a high temperature in the heat-affected zone of AH36 Steel. The grain grows significantly and some refractory particles are melted in. The overheated and coarse austenite grains increase the stability of these refractory particles, so that the refractory particles have no time to precipitate during the cooling process of AH36 Steel and the material becomes brittle, thus reduces the toughness of the weld heat-affected zone.
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
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