Explanation
alloy structural steel with room temperature yield strength higher than 1370MPa, tensile strength higher than 1470MPa and higher fracture toughness. According to the content of alloy elements, it can be divided into low alloy ultra-high strength steel, medium alloy ultra-high strength steel and high alloy ultra-high strength -steel. According to its structure and properties, it can be divided into general ultra-high strength steel, ultra-high strength stainless steel, maraging steel, matrix steel, etc. - a large number of which are used in aircraft I landing gear, fuselage framework and skin, rocket shell, high-pressure vessel, armor and weapon parts.
Classification
Metals -> Steels -> Alloy steels