The strength, hardness, elasticity and hardenability of 65Mn steel plate are higher than that of No. 65 steel. It has the tendency to overheat sensitivity and temper brittleness, and the tendency to water cooling to form cracks. The annealed machinability is acceptable, the cold deformation plasticity is low, and the weldability is poor. Medium load leaf springs, 7-20mm diameter coil springs and spring washers. High wear resistant parts, such as grinding machine spindles, spring chucks, precision machine tool screws, cutters, rings on spiral roller bearings, railway rails, etc.
Q235B steel plate is a type of low carbon steel. The national standard GB / T 700-2006" Carbon structural steel" has a clear definition. Q235B is one of the common steels in China, low in price, and can be used for most products with low performance requirements.
Q235B has elongation, strength, good toughness and formability, and is easy to stamp and weld, and is widely used in general mechanical parts manufacturing. It is mainly used to weld structural parts with high quality requirements in bridge construction and engineering.
