Steel 25G (25Г2)
Designation
Description
Steel 25G used: for the manufacture of rivets of responsible use (after improvements), piston pins, friction discs, finger springs, Cam rollers, bolts, nuts, screws, gears, worms, and other parts with high hardness and wear resistance of the surface (after cementation, or cyanidation); welded sub frames, shoes, scarves, fittings, bushings (without heat treatment); collectors of marine water-tube boilers (article 25Г2).
Note
Structural steel high-quality manganese.
Standards
Chemical composition
Fe is the basis.
According to GOST 4543-71 the chemical composition is given for steel grade 25G. The content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
According to GOST 4543-71 the chemical composition is given for steel grade 25G. The content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.