Spring steel profile description Dongguan Hanlin agents sk5 sk7 65mn 1095 1085 1074 60si2mn sks51 sup6 sup7 sup10 sup12 complete specifications factory wholesale spring steel Name: spring steel Definition: carbon content of 0.60% to 0.95% of the steel is deformed by cold strengthening of a better spring steel, used to make all kinds of springs. Respective disciplines: mechanical engineering (a subject); Also, because it is in the environmental conditions under dynamic loading elastic material (instrumentation) (three subjects) spring steel is mainly good elasticity,; instrumentation materials (two subjects) work, the main material for the manufacture of the spring should be high yield strength; when subjected to a heavy load without causing plastic deformation; should have high fatigue strength under a load repeatedly applied with a long service life; with sufficient toughness and ductility, under the impact force to prevent sudden brittle fracture. Spring steel is due to the elasticity of steel in the quenched and tempered condition, and specifically for the manufacture of springs and elastic components. Spring steel depends on its ability to elastically deform, i.e., within the predetermined range, the elastic deformation capacity to withstand a certain load without permanent deformation after the load is removed. Spring steel should have excellent overall performance, such as mechanical properties (especially elastic limit, ultimate strength, yield ratio), reduced ballistic performance (ie anti decreased elasticity properties, also known as anti-relaxation properties), fatigue properties, hardenability Physical and chemical properties (heat resistance, low temperature, oxidation, corrosion, etc.). To meet these performance requirements, spring steel having excellent metallurgical quality (high purity and homogeneity), good surface quality (strict control of surface defects and decarburization), the exact shape and size. According to GB / T 13304 "Steel classification" standard, in accordance with the basic performance characteristics and the use of a spring steel is mechanical structural steel; according to quality grade, is a special quality steels, namely in the production process requires strict control of the quality and performance of special steel . According to China's habit, is a special steel spring steel, spring steel when making technical requirements are relatively high, excellent quality directly determines the level of technology. Material Name: Spring Steel Grade: 9260 Standard: AISI Chemical Composition: Carbon C: 0.64 Si Si: 2.00 Mn Mn: 0.90 Sulfur S: 0.030 Phosphorus P: 0.030 Chromium Cr: 0.35 Ni-Ni: 0.35 Copper Cu: 0.25 Mechanical Properties: Anti- tensile strength σb (MPa): ≥ 1568 (160) Yield strength σs (MPa): ≥ 1372 (140) Elongation δ10 (%): ≥ 5 section shrinkage ψ (%): ≥ 20 Hardness: hot, ≤ 321HB; Cold Drawn + heat treatment, ≤ 321HB Heat treatment and microstructure specifications: Heat treatment specifications: quenching 870 ℃ ± 20 ℃, oil cooling; tempering 440 ℃ ± 50 ℃ (when special needs, ± 30 ℃). Delivery status: hot-rolled steel to heat treatment or heat treatment delivery, cold drawn steel to heat treatment delivery characteristics and scope of application: It is widely used silicon manganese spring steel, strength, flexibility and hardenability compared. For railway vehicles, bear a greater load on the automobile and tractor industries flat spring or coil spring 30mm or less in diameter, and is also suitable for the production of working temperature below 250 ℃ non-corrosive medium heat and withstand alternating load spring and under high stress the important work of the large spring roll.