The mechanical properties of tensile strength (σb / MPa): ≥ 1100 the yield point (σs / MPa): ≥ 800 Elongation (δ5 /%): ≥ 10 section shrinkage rate (ψ /%): ≥ 45 impact absorbed energy ( aku2 / J): ≥ 50 Brinell hardness (HBS100/3000) (annealing or high temperature tempered condition): ≤ 229 

 Key Features 
 The high strength quenched and tempered structural steel. With high strength and toughness, hardenability higher cold deformation of the plastic medium, good cutting performance. Tendency to temper brittleness, poor transverse impact toughness. Good welding performance, but the thickness is greater than 3mm should be preheated to 150 ° C, the required heat treatment after welding. General use after quenching and tempering. 

 Application examples 
 Used for the manufacture of high load, high-speed variety of important parts such as gears, shaft, clutch, sprocket wheel shaft, bushings, bolts, nuts, etc., but also for the manufacture of wear, and not part of the operating temperature, variable load welded components, such as high pressure blower blades, valve plate, as well as non-corrosive pipe tube.