HP 9-4-20

HP 9-4-20 VAC-ARC steel is a low alloy, high-strength steel with a high nickel and cobalt content to promote toughness. The alloy has been designed to have high hardenability, good weldability, and excellent fracture toughness. It is typically used in the 200/205,000 psi (1374/1408 MPa) yield strength range. HP 9-4-20 steel is produced by the consumable electrode vacuum arc remelting process to provide optimum cleanliness and preferred ingot structure.