Medium/high carbon low alloy steel for warm/cold forming

摘要

A medium/high carbon low alloy steel which can be cold formed by cold or warm forging and heat treated. The material consists essentially of: - Element Weight Percent - Carbon (C) about 0.45-0.65 - Manganese (Mn) about 0.35-0.45 - Chromium (Cr) about 0.70-0.80 - Nickel (Ni) about 0.35-0.50 - Molybdenum (Mo) about 0.15-0.30 - Titanium (Ti) about 0.01-0.02 - Aluminum (Al) about 0.01-0.02 - Silicon (Si) about 0.008-0.15 - Boron (B) about 0.001-0.003 - Iron (Fe) Balance - Vanadium (V) Less than about 0.10 - Oxygen (O) about 0.002-0.005 - Nitrogen (N) about 0.001-0.008 - Copper (Cu) Less than about 0.35 - Zirconium (Zr) Less than about 0.01 - Antimony (Sb) Less than about 0.01 - Tin (Sn) Less than about 0.01 - Sulfur (S) about 0.001-0.010 - Phosphorus (P) about 0.001-0.02 - The composition also defined by the following expressions based on weight percent: Moreover, it has been found that this material when quenched and then tempered at 400 DEG F.+/-25 DEG F. will exhibit surprising ductility, strength, toughness and hardness properties. The alloy disclosed herein is particularly useful in forming sockets for socket wrenches and needle-nosed pliers.