Shandong ductile pipe manufacturers provide three major performance characteristics of ductile cast iron pipes. First: Mechanical properties Mechanical properties refer to the tensile strength and yield strength. The composition is the metallographic structure. I will give you two examples. I hope to give you a reference: Grades QT400-18, tensile strength 400Mpa, yield strength 250Mpa, Brinell hardness: 130~180, main metallurgical structure: ferrite (100%), characteristics: good plasticity and toughness, weldability and machinability It is also better, and the room temperature impact toughness is also better.
Grade 500-7, Tensile Strength 500Mpa, Yield Strength 320Mpa, Brinell Hardness: 170-230, Major Metallurgical Structure: Ferrite + Pearlite (100%), Characteristics: Moderate Strength and Abrasion Resistance, Machinability Still good.
Second: Corrosion Resistance Third: Seismic Performance According to the “Urban Earthquake Disaster Prevention Planning Standardsâ€, the number of deaths caused by earthquakes in China accounts for 54% of the deaths caused by natural disasters in China, and the number of earthquake deaths in China accounts for the death toll of the world’s earthquakes. %the above. 80% of the country's land area is located in areas with an earthquake intensity of 6 degrees and above, and 2/3 of the cities with population of more than a million are located in high-risk areas of 7 degrees and above. Earthquake prediction is still a global problem so far. Due to the tremendous destructive power of the earthquake, we have reason to consider the seismic performance of the pipe in advance during the construction of the urban pipe network, and to minimize the damage to the pipe network. The pipe repair is convenient and quick. Restore water supply as soon as possible. This is of great significance to the recovery of economic life after the disaster.
Windbreak Net,Windbreak Trees ,Debris Netting ,Fence Netting
Chain Link Fence Co., Ltd. , http://www.nbshadenet.com