9 silicon chromium: also known as "9crsi" it is a commonly used low alloy tool steel with high quenching and hardening properties and high tempering stability for the manufacture of complex shapes, small deformations, high wear resistance, low speed cutting tools such as drills, threaded ring gauges, reamers, slabs, taps, wrong plates, rollers and other steels Carbon content 0.85 to 0.95 % High hardness and wear resistance can be used to manufacture large cross-sectional tools with complex shapes. Generally used in agricultural machinery as guillotine blades for cutting machines or small crushers

Manganese steel: Manganese steel is a kind of high strength steel, generally divided into low manganese steel, medium manganese steel, high manganese steel, mainly used for the need to withstand the machine, friction and other harsh conditions, generally speaking, the higher the manganese content in manganese steel, the better the strength and toughness of manganese steel, in agricultural machinery is generally used for medium and large crusher blades or making machinery bearings