The alloy composition of high manganese steel usually includes 11-14% manganese (Mn), 0.9-15% silicon (Si), 0.4-1.0% chromium (Cr), and trace amounts of phosphorus (P), nickel (Ni) and molybdenum (Mo). The precise ratio of these elements gives the movable jaw plate good impact resistance. In actual work, the movable jaw plate often needs to withstand high-intensity impact and friction from ore or other hard materials. The self-hardening characteristics of high manganese steel make it gradually form a hardened layer on the surface when it is impacted, which effectively improves its wear resistance and impact resistance. It can maintain stable performance even under strong impact and is not easy to break or damage.Due to the good impact resistance of high manganese steel, the movable jaw plate of the jaw crusher can operate continuously and stably in a high-intensity crushing environment, especially suitable for processing materials with high hardness and certain brittleness such as ore, sand, and gravel, and construction waste. The impact resistance of the movable jaw plate enables it to effectively reduce equipment downtime, maintenance frequency, and replacement costs under complex working conditions, and ensure the efficient and stable operation of the crusher.