SCM440 / 4140

SCM440 is specifically used in high-strength fasteners and has such advantages as stable components, low hazardous elements, high purity of steel content, small practical decarburized depth and few surface flaws; as well as easy spheroidizing annealing, low breakage rate in cold upsetting performance, stable quality in heat treatment and even hardness for a wide range of applications in engines, die molds, gears and driving parts.
Specification
TAIWAN - CNS | CHINA - GB | JAPAN - JIS | USA - ASTM | GERMANY - DIN |
SCM440 | 42CrMoA | SCM440 | 4140, 4142 | 42CrMo4, 42CrMoS4 |