65mn spring steel is a kind of spring steel commonly used in life. Because of its advantages of good hardness, good hardenability, low decarburization tendency, relatively low price and good machinability, it is usually used to produce steel wire and steel strip, and to manufacture various round springs, flat springs, spring plates and leaf springs with small cross sections. 65mn spring steel is widely used in automobile industry, electronics industry, trains and other means of transportation. So what is the material of 65mn spring steel? What are the specifications and characteristics of 65mn spring steel? Today, Bian Xiao leads everyone to find out.

What is the material of 65mn spring steel?

65mn spring steel contains high-quality carbon structure with high manganese content, and has good strength, hardness and elasticity. At the same time, the material of 65mn spring steel contains carbon and alloy elements in steel, which can effectively ensure the performance of the spring. The material of 65mn spring steel is influenced by metallurgical quality and decarbonization of steel, and it has high strength and plasticity.

Characteristics of 65mn spring steel

65mn spring steel has higher elasticity and hardenability than 65 steel, and tends to be overheated and tempered embrittled, so it is easy to form cracks after water quenching. The cutting performance in annealed state is low in cold deformation plasticity and poor in welding performance.

Although 65mn spring steel wool has high manganese content and good hardenability, its surface debonding tendency is smaller than that of silicon steel, and its comprehensive properties after heat treatment are better than that of carbon steel. Although it is sensitive to overheating, it will produce a strong quenching line and has temper brittleness. 65mn spring steel is generally used as cushion spring, spring spring and round spring, and can also be used to make brake spring, clutch reed, valve spring, cold-drawn steel wire and cold-rolled coil spring.

Mechanical properties of 65mn spring steel, such as tensile strength (MPa): ≥ 980 (100), yield strength? (MPa): ≥ 784 (80), elongation? (%): ≥ 8, area shrinkage? (%): ≥ 30, hardness and hot rolling: ≤302HB, cold drawing and heat treatment, ≤32 1HB.

Hot rolled steel of 65mn spring steel is delivered in its heat-treated or non-heat-treated state, while cold-drawn steel is delivered in its heat-treated state.

65mn spring steel has excellent comprehensive properties, such as elasticity, strength, elasticity thinning, relaxation resistance, hardenability, heat resistance, low temperature resistance, oxidation resistance and corrosion resistance. 65mn spring steel has high metallurgical quality, good surface quality and accurate shape and size.

By introducing the material of 65mn spring steel, have you mastered the material of 65mn spring steel? Only by truly mastering the use, characteristics and specifications of 65mn spring steel can we make better use of it.