4145H round steel is equivalent to the domestic brand?
4145H is round steel, oil drilling steel, domestic steel, Xingcheng Special Steel, steel and other steel mills have production in the Great Wall. The industry commonly used 42CrMo instead.
42CrMo steel is ultra high strength steel, high strength and toughness, hardenability is also good, no obvious temper brittleness, after quenching and tempering treatment have high fatigue limit and anti shocksand low temperature impact toughness. The steel is suitable for making large and medium plastic moulds with certain strength and toughness.
Round steel is a solid strip of steel whose cross section is round. Its specifications are expressed in diameter, in units of millimeters (mm), such as "50mm", which means a diameter of 50 millimeters of round steel. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Of which: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts; round steel larger than 25 millimeters, mainly used for making machines.
4145H rounds are used in oil drilling tools and are often replaced by 42CrMo in the industry.
