Products Material Name: High-quality carbon structural steel Grade: 70Mn Standard: GB / T 699-1988 Features and Scope hardenability better than 70 steel, after heat treatment achieved better strength than the 70 steel, heat treatment overheating sensitivity and temper brittleness, easy to produce quenching cracks. Cold plastic deformation is poor, poor welding. Withstand large stress, work wear parts under conditions, such as a variety of coil spring washer. Thrust ring Locking ring clutch disc disadvantages 1005, for the manufacture of wear and load large mechanical parts processing 1005 , such as coil springs, spring washers, thrust ring, clutch plate, lock ring, coil spring and the like. Mechanical Properties: Tensile strength σb (MPa): ≥785 (80) Yield strength σs (MPa): ≥450 (46) Elongation δ5 (%): ≥8 section shrinkage ψ (%): ≥30 Hardness: no heat treatment, ≤285HB; annealed steel, ≤229HB sample size: Sample size is 25mm Heat treatment and microstructure Heat Treatment Specification: normalizing, 790 ℃. 70mn density ρ = 7.81 g / cc 1005 mechanical properties of the steel can be cold rolled steel sheet, strip and wire, making spring. 70mnMn can also be made into such fitter chisel, stylus and other tools. 70Mn steel can be made generally cross-sectional dimension of about 8 ~ 15mm small spring as a variety of small-sized flat, round spring, the bottom cushion spring, spring winding. Name: high-quality carbon structural steel grades: 50Mn Standard: GB / T 699-19992 feature 50Mn strength, elasticity and hardness are high, more after quenching and tempering use, poor welding performance. 50Mn round for manufacturing high wear resistance under high load is applied to the heat-treated parts such as gears, gear shaft and the cross section of 80mm below the mandrel and the like. Performance similar to 1005 and No. 50, but its high hardenability after heat treatment strength, hardness, elasticity were slightly higher than the 50 steel. Poor welding, with thermal sensitivity and tendency to temper brittleness. Used parts to withstand stress, high wear-resistant parts, high stress parts, such as less than 80 mm diameter mandrel. After the induction hardening can also create a train axle, worm, connecting rods and automotive crankshaft, such as gears, gear shafts, friction disc, spindle, flat spring. No heat treatment hardness ≤255HB; annealed steel ≤217HB normalizing heat treatment 830 ℃ 830 ℃ tempered at 600 ℃ quenching process 1005 | Suzhou, with (certified) | 1005 by Metal Materials Co., Suzhou with. Suzhou, with Metal Materials Co. (www.szrtjs.com) adhere to the "people-oriented" business philosophy, with a professional staff, and strive to provide the best products and services to contribute to society, and to welcome new and old customers throughout the visit, sincere cooperation for a better future. Suzhou, with - your trusted friend Address: Suzhou City Pu Town and Anxi Road (Puyang Road) 1238, Contact: Mr. Wang.