... ,51CrV4,52CrMoV4,55Si7,60Si7,28MnSiB,58CrMnB4,27MnMoVB, 65Mn,55CrSi,50CrV,60Si2Mn,CK67,60Si2CrVA,60Si2CrMnA.Use Standard parts; Fasteners; Hardware, spring, mechanical ... property GradeYield StrengthMpaStrength of ExtensionMpaElongation A%Reduction of Area Z% 60Si2Mn≥1175≥1275A11.3≥5≥25 55CrMnA≥1075≥1225≥9≥20 ...