STEEL FOR RAILWAY AND TRAM POINT CROSSING FROG CASTINGS

摘要

A steel composition for the production of railway and tram crossing point fr og castings is disclosed which includes iron with, by weight, 0.15 to 0.2% of carbon, 1 - 1.8% of manganese, 1 - 1.6% of silicone, 1.5 - 2.5% of chrome, 2.3 - 3.5% of nickel, 0.4- 0.7% of molybdenum and 0.0025 - 0.005% of boron. The composition has a higher wea r and tear resistance and longer service life.