46Si7 steel spring steel _ Basic Information Name: hot rolled quenched and tempered spring steel grades: 46Si7 Executive Standard: EN 10089-2003 Density: 7.85 cm / g * 3 belongs Category: 46Si7 steel spring steel spring steel _ Product Features and Scope uses a very wide, mainly for cars, motorcycles, tractors damping spring, spiral spring steel, cylinder valve springs, valve springs, but also for the production of alternating loads and work under high stress the importance of springs, anti-wear spring and so on. 46Si7 method of producing steel spring steel _ with sedation steel. Steel forging should be greater than 4S, 4S should be less than the demand side with the protocol. No special requirements, the steel should be rolled condition. Brinell hardness of steel in principle should not exceed 302. The hot-rolled material using cold predetermined cold drawing, cutting, grinding methods to manufacture. _ 46Si7 spring steel should have good surface quality of the steel surface should not affect the use of harmful defects. 46Si7 spring steel _ about decarburization decarburization of steel should not be harmful, allows the depth of decarburization can be negotiated 46Si7 spring steel _ product chemical composition (mass fraction) /% Carbon C (%): 0.42 ~ 0.50 Sulfur SI ( %): 1.50 to 2.00 Manganese MN (%): 0.50 ~ 0.80 P P (%): ≤ 0.025 Sulfur S (%): ≤ 0.025 Chromium CR (%): - Mo MO (%): - V V (%) : - Boron B (%): - 46Si7 spring steel _ products hardenability state mechanical properties Delivery status: martensitic 80%: 48HRC martensitic 90%: 51HRC distance from the quenched end A / mm: martensitic 80%: 4A martensite 90%: 3.2A maximum size, in oil quenching round D / mm martensite in the core: 80%: 5 90%: 6 maximum size, in oil quenching steel T / mm martensite in the core: 80%: 6 90%: 4 46Si7 spring steel products, main characteristics: a higher strength, yield strength less than the elastic resistance, good toughness, high fatigue strength, and the Lord hardenability and lower thermal sensitivity, decarbonization tend to decrease, cold plastic deformation is low.