API2HGr50 marine steel plate is a steel plate for the American offshore platform structure, and SM490YB is a Japanese structural steel plate. The executive standard is JISG3106. API2HGr50 marine steel plate thickness: 8-100mm.
API2HGr50 marine steel plate is a carburized steel with good performance. It has high hardenability. After carburizing and quenching, it has a hard and wear-resistant surface and a tough core. API2HGr50 marine steel plate has high low-temperature impact toughness, medium weldability, and can be normalized. Good machinability.
API2HGr50 marine steel plate is widely used as carburized parts with small cross-sections and high-load quenched and tempered parts with large cross-sections, such as gears, shafts, spindles, worms, sleeves of governors, friction wheels of transmissions, etc., and can also replace 20CrNi Steel is made of parts with small cross-sectional dimensions, medium pressure, and no large impact load.
