Patent ID: 6893608

Claim:
Maraging steel with improved machinability, good weldability, and high corrosionresistance, containing (in % by weight) 0.02-0.075% carbon; 0.1-0.6% silicon; 0.5-0.95% manganese; 0.08-0.25% sulfur; phosphorus present up to a maximum of 0.04%; 12.4-15.2% chromium; 0.05-1.0% molybdenum; 0.2-1.8% nickel; vanadium present up to a maximum of 0.15%; 0.1-0.45% copper; aluminum present up to a maximum of 0.03%; 0.02-0.08% nitrogen; and residual iron, and impurities caused in manufacturing, which steel has a ferrite percentage of less than 10% by volume, wherein said maraged steel has been subjected to an annealing treatment for formation and ajustment of the ferrite percentage in the steel, thereafter hot formed with an at least 4-fold degree of deformation, thereafter soft annealed, and thermally tempered with at least one hardness treatment and at least one draw treatment.