25CrMo4

Weldable case-hardening steel that can withstand temperatures up to about 525°C.

25CrMo4 is a low alloy steel containing chromium and molybdenum as the main alloying elements. Often used in engineering applications where high strength and toughness are required. The "25″ in its name refers to the average carbon content of about 0.25%, while "Cr" and "Mo" stand for chromium and molybdenum respectively. The addition of these alloying elements improves the steel's hardenability, resistance to abrasion and corrosion, and high temperature strength. 25CrMo4 steel can be heat treated to improve its mechanical properties, such as hardness and strength. It also exhibits good weldability and machinability, making it suitable for a wide range of manufacturing processes.

Overall, 25CrMo4 is a versatile and widely used steel alloy in engineering and manufacturing applications that require high strength and toughness. It is often used for shafts, wear rails, bolts, gears, etc.