ultra-high strength steel with alloy element content more than 10%. The common ones are precipitation hardening stainless steel and maraging steel. precipitation hardening stainless steel has significant strengthening effect mainly through precipitation of alloy carbide and imermetallif compound. maraging steel mainly produces significant strengthening effect through aging precipitation of imermetallif compound. It uses ultra-low carbon content and adds a large number of alloy elements that can form imermetallif compound. The strength and fracture toughness of typical steel designation 18NU high alloy ultra-high strength -steel are very high, and they are widely used in the manufacturing of key structural parts in aerospace, marine engineering, national defense and military industry.
No classification at present.