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Q345B
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Q345B is a Chinese standard low alloy high strength structural steel with a minimum yield strength of 345 MPa. It has better properties than Q235 and is widely used in bridges, ships, boilers and other high-load welded structural parts.
Find out the international equivalents of Q345B, a Chinese standard for non-alloy quality structural steel. Compare the chemical composition and properties of Q345B with S355JR, the European equivalent grade.
Q345 is a low alloy steel material with high yield and tensile strength, used in various structures and vessels. Learn about its characteristics, welding properties, and equivalent materials in different countries.
Q345 steel is a low alloy structural steel with good mechanical properties and welding performance. It is widely used in various fields and has different chemical compositions and mechanical properties depending on the letter suffix.
Q345B is a low alloy steel with a yield strength of 345MPa and an impact temperature of room temperature (20°C). Learn how it differs from other Q345 grades, such as Q345A, C, D, and E, and compare it with 16Mn steel.
Q345 is a structure steel grade with chemical composition, mechanical properties, heat treatment and micro structure. It is used in bars, sheets, plates, pipes and other products.
Q345B steel is a Chinese standardized low alloy, medium tensile strength steel made with a hot-rolling process, and is used for a number of manufacturing purposes. It is a steel with less than 0.2 percent of its composition made up of carbon, less than 0.55 percent of its composition made of silicon and several impurities (mostly sulfur, chromium and nickel).
Q345 steel is a low alloy, medium tensile strength steel used for various applications. Learn about its yield strength, tensile strength, hardness, chemical composition and mechanical properties.
Q345 steel is a Chinese GB standard Low Alloy High Strength Structural Steel, material density is 7.85 g/cm3, tensile strength is 470-630 Mpa, and yield strength is 345 MPa, it has better properties than Q235. According to GB/T 1591 - 2008, Q345 material has 5 quality grades: Q345A, Q345B, Q345C, Q345D and Q345E.
Q345A ， Q345B ， Q345C ， Q345D ， Q345E. This is a distinction between grades, mainly because the impact temperature is different! Q345A grade, without impact; Q345B grade, impact at 20 °C ambient temperature; Q345C level, 0-degree impact; Q345D level, impact at -20 degrees; Q345E grade, with an impact of -40 degrees.