Complete 55si2mn spring steel spring steel specification affordable 55si2mn

1.65, 70, 85: to obtain a high strength, hardness, yield ratio, but hardenability small, good heat resistance, low ability to withstand dynamic loads and fatigue loads is widely used, but more for the working temperature not high, small springs or less important large springs. Such as automobiles, tractors, railway vehicles and general machinery spring. 65Mn composition is simple, hardenability and mechanical properties, process performance than steel decarburization good, but more sensitive to overheating, temper embrittlement, hardening easily crack a lower price, a great amount. Manufacture of various small section flat spring, round spring, spring, etc., can make the valve spring, spring ring, shock absorbers and clutch springs, brake springs and the like. 2. 55Si2Mn, 60Si2Mn, 60Si2MnA silicon content (Wsi) high (upper limit of 2.00%). High strength, good elasticity. Good temper resistance. Decarburization and graphitization. Hardenability is not high. The main spring steel type, very versatile. Manufacture all kinds of springs, such as cars, motorcycles, tractors leaf springs, coil springs, cylinder valve springs and spring some important work under high stress, severe wear spring. 55Si2MnB because boron, which significantly improved hardenability light, midsize car front suspension springs, Deputy spring. 55Si2MnB Chinese self-developed steel, hardenability, mechanical properties, fatigue performance better than that of steel 60Si2Mn major manufacturers, the good small car leaf spring effect, can also be made of other medium-sectional dimensions of the leaf springs, coil springs . 3. 60Si2CrA 60Si2CrVA high strength spring steel. Hardenability, good heat treatment process performance. Because of the high intensity, should be promptly after spring roll treatment to relieve internal stress load big important manufacturing large springs. 60Si2CrA be prepared Turbine Seal spring, adjusting spring, condenser bearing springs, disc springs and other high pressure pumps. 60Si2CrVA also make a very important steel springs, such as conventional weapons extractors hook spring, spring breakers. 4. 55CrMnA 60CrMnA advantage is good hardenability, additional thermal processing performance, mechanical properties, resistance to decarbonization performance is also a big cross-section of various important springs, such as cars, locomotives large leaf springs, coil springs and the like. 5. 60CrMnMoA hardenability up in various existing spring steel. Mechanical properties, resistance to tempering stability is also good large-scale civil engineering, heavy vehicles, machinery and other large springs used. Plate thickness up to 35mm or more, round diameter of more than 60mm. 6. 50CrVA small amount of vanadium to improve flexibility, strength, yield ratio and reduce resistance shells, refined grains, reducing the tendency to decarburization. The carbon content is small, ductility, toughness is good compared to other spring steel. High hardenability, fatigue performance of various important Hao coil springs, particularly suitable for high work stress amplitude fatigue performance demanding springs, such as valve springs, nozzle springs, cylinder expansion ring, valve spring and so on. 7. 60CrMnBA hardenability higher than 60CrMnA various other properties similar to larger leaf springs, coil springs, torsion springs. 8. 30W4Cr2VA high-strength heat-resistant spring steel. Good hardenability. High temperature anti-relaxation and thermal processing performance is also very good temperature resistant spring 500 ~ C or less, such as turbine main steam valve springs, steam seal spring, boiler safety valve spring, 400t boiler disc valve spring.