Abstract: Disclosed is an austenitic light weight steel which may have decreased specific gravity while maintaining excellent strength and ductility. The austenitic light weight steel may include carbon (C) in an amount of about 0.8 to 1.3 weight %, aluminum (Al) in an amount of about 9.0 to 15.0 weight %, manganese (Mn) in an amount of about 10.0 to 20.0 weight %, nickel (Ni) in an amount of about 0.25 weight % or less (excluding 0 weight %), chromium (Cr) in an amount of about 0.5 weight % or less (excluding 0 weight %), silicon (Si) in an amount of about 0.5 weight % or less (excluding 0 weight %), a sum of titanium (Ti) and vanadium (V) in an amount of about 1.0 weight % or less (excluding 0 weight %), other unavoidable impurities, and iron (Fe) constituting the remaining balance, based on the total weight of the light weight steel.

Abstract: Disclosed are nickel alloys for exhaust system components having improved tensile strength, fatigue strength, oxidation resistance, and abrasion resistance at a high temperature condition. A nickel alloy for exhaust system components according to an embodiment is used for exhaust system components of a vehicle engine, the nickel alloy including: 0.01 to 0.2 wt % of C; 0.1 to 1.0 wt % of Si; 0.1 to 1.5 wt % of Mn; 8 to 24 wt % of Cr; 0.1 to 2.5 wt % of Nb; 0.1 to 4.0 wt % of Al; 0.01 to 1 wt % of Co; 0.01 to 5.0 wt % of Mo; 0.01 to 4 wt % of W; 0.1 to 1 wt % of Ta; 0.1 to 2.4 wt % of Ti; 4.0 to 11.0 wt % of Fe; a remainder being Ni; and inevitable impurities.

Abstract: Disclosed are nickel alloys for exhaust system components having improved tensile strength, fatigue strength, oxidation resistance, and abrasion resistance at a high temperature condition. A nickel alloy for exhaust system components according to an embodiment is used for exhaust system components of a vehicle engine, the nickel alloy including: 0.01 to 0.2 wt % of C; 0.1 to 1.0 wt % of Si; 0.1 to 1.5 wt % of Mn; 8 to 24 wt % of Cr; 0.1 to 2.5 wt % of Nb; 0.1 to 4.0 wt % of Al; 0.01 to 1 wt % of Co; 0.01 to 5.0 wt % of Mo; 0.01 to 4 wt % of W; 0.1 to 1 wt % of Ta; 0.1 to 2.4 wt % of Ti; 4.0 to 11.0 wt % of Fe; a remainder being Ni; and inevitable impurities.