What is the material Q345D Shandong Q345D pipe Q345D steel pipe manufacturers of a professional material. Q represents the yield of this material, behind 345, refers to the yield value of this material, at 345 or so. And with the increase of the thickness of the material to make its yield value decreases. Q yield strength of not less than 345Mp quality grade which contains the impurity elements (carbon, manganese, silicon, sulfur, phosphorus is the amount of impurities in steel), A, B, C, The less Q345D contains phosphorus and sulfur equal to or less than 0.030% and the more phosphorus and sulfur impurity elements in the steel the worse the impact toughness Q345D -20 degrees Celsius aKV not less than 34. The reason is that the reduction of P and S impurity elements in steel can promote the improvement of impact toughness at low temperature, one of which is the Q345 chemical composition and the mechanical property of Q345. The sales information source
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