What are the common defects in welding area of SPA-H hr coil welding parts

BBN steel company was founded in 2000, starting the international business in 2010 and successfully being approved and certified by ISO9001:2008. After ten years development, BBN steel has become the large-scale comprehensive enterprise group, combining steel trading, SPA-H hr coil plate processing, and steel distribution, also have large warehouse and processional representatives both inTianJin, Zhengzhou and Beijing city.

SPA-H hr coil, carbon steel plate is a kind of steel plate, and it is the abbreviation of common carbon structural steel. The carbon steel plate belongs to a large category of steel, including Q235, SS400, A36, SM400, ST37-2, etc. Due to the different names in various countries, the carbon steel standards implemented are also different. The ordinary carbon structural steel, SPA-H hr coil is mainly used for construction machinery, mining machinery, heavy vehicles, bridges, pressure vessel plate and other engineering structures.

Q345R steel plate is a special pressure vessel steel with a yield strength of 340 Mpa. SPA-H hr coil, Q345R pressure vessel steel has good comprehensive mechanical and technological properties. The content of phosphorus and sulfur of Q345R pressure vessel steel is slightly lower than that of Q345 (16Mn) steel, and the tensile strength and elongation requirements of Q345R pressure vessel steel are higher than those of Q345 (16Mn) steel, and the impact toughness of Q345R pressure vessel steel is also required. Q345R pressure vessel steel is the most widely used Chinese pressure vessel steel.

The allowable temperature of SPA-H hr coil, boiler steel is mainly determined by strength condition. Different steels have different mechanical properties and high temperature properties. Even for the same kind of steel, the tensile strength, yield strength and rupture strength vary greatly with the working temperature, and decrease with the increase of working temperature. In order to ensure the safety of SPA-H hr coil work, the actual stress of SPA-H hr coil under the working temperature should be less than the allowable stress determined by the tensile strength, yield limit and permanent strength of SPA-H hr coil under the temperature.

ASTM A537 class 1 boiler plate is pressure vessel steel. SPA-H hr coil, A537 class 1 boiler plate chemical elements include C, Si, Mn, P, S, Mo, Ni, etc. Among them, the carbon content is 0.24 max., Si content is 0.13-0.55%, Mn content is 0.92-1.72%, the max. contents for both P and S are 0.035%, the Mo content is 0.09% max, and the Ni content is 0.38% max. A537 class 1 boiler plate properties: A537 class 1 boiler plate tensile strength is 450-585 MPa, min. yield strength is 310 MPa, and min. elongation in 2 in.(50mm) is 18%.

If you have steel demands in the near future, please send us inquiry in advance, as we have regular steel production plan and can arrange you a reasonable prodction time. Other than fresh production, we also have huge SPA-H hr coil stocks for the most widely used steel materials. So that the customers need not wait too long to get their required steel. Welcome to contact us and consult steel price, our sales person will give you professional answers and suggestions.

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