Is 40 Cr-Mo high manganese alloy steel used for hoeing?

Cr-Mo steel is good as a hoe, but its hardness is unknown. Cr-Mo alloy steel is one of the alloy steels in China, and 30 refers to carbon content. Use it to do 10. 9S 8 .8S high strength bolt. However, before use, it is necessary to test and confirm the content of its components in order to use it with confidence.

China brand 30CrMO is equivalent to Japanese SCM430. The steel has high strength, toughness and hardenability, and its critical hardenability in oil is15 ~ 70 mm; The thermal strength of steel is also good, with sufficient high-temperature strength below 500℃, but the strength decreases obviously at 550℃. The alloying elements are quite good at the lower limit of welding, but the weldability is moderate near the upper limit, and it needs to be preheated to above 175℃ before welding. Steel has good machinability and medium plasticity during cold deformation. The first kind of temper brittleness exists in the range of 300~350℃ during heat treatment; Tending to form white spots.