Q345 angle steel Application,Q345 angle steel standard
Q345 angle steel is a steel material. It is a low-alloy steel, widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment. "Q" means the yield strength, Q345 angle steel indicates that the steel yield strength of 345MPa.
Q345 angle steel will increase the thickness of the material and its yield value decreases. And the possibility of a small domestic
High strength steel
At 345, so when the mechanical design strength must be less than 345 this value, otherwise there will be problems.
Reference Standard: GB / T1591-2008 "high strength low alloy structural steel."
Note: Q345 latest standards GB / T1591-2008 with respect to the old standard, the most obvious change is the Mn contents change from the original 1.0-1.60 corrected to ≤1.70, canceled the minimum limit.
With the discovery of modern industry, science and technology advances, various trace elements in steel sheet in a more extensive, Mn content of the steel is not the only factor affecting the strength and mechanical properties. Therefore, the State Administration of Quality Supervision, Inspection and Quarantine People's Republic of China and the Standardization Administration of China jointly issued a high strength low alloy steel standard implementation, cancel the Mn content range is limited only provides maximum.
For the detection of Q345 steel, on the one hand is the element content of the steel has reached the Chinese standards, the most important aspect is detected by a professional organization of mechanical properties of steel (yield strength, tensile test) is up to standard.
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