Alloy Steel is an iron based mixture containing manganese greater than 1.65%, silicon over 0.5%, copper above 0.6%, or other minimum quantities of different alloying elements such as chromium, nickel, molybdenum, or tungsten are present, each of which imparts different properties to alloy steel. 300M alloy is used primarily in the 270/300 ksi (1862/2068) tensile strength range for aircraft landing gears, flap tracks and other structural applications. Vacuum arc remelting (VAR) imparts improved cleanliness and preferred ingot structure. 300M is a low alloy, vacuum melted, steel of very high strength. Essentially it is a modified AISI 4340 steel with silicon, vanadium and slightly more carbon and molybdenum. 300M has a very good combination of strength toughness, fatigue strength and good ductility.

Abridged Nickel/Stainless Steel Briefing . Nickel closed Thursday's trading session at $6.39/lb ($14,085/tonne). Indicators at 6:35 am CST today show nickel trading around $.02/lb higher. Stockpiles of nickel stored in LME licensed warehouses rose yet again on Thursday and started the day just under the 171,100 tonne level. LESCALLOY® 300M V 300M VAC-ARC® HIGH STRENGTH ALLOY STEEL Typical Composition 0.42 0.75 1.65 1.80 0.80 0.40 0.07 C Mn Si Si Ni Ni Cr Cr Mo Mo V V GENERAL CHARACTERISTICS LESCALLOY 300M VAC-ARC steel is a modified 4340 steel with added silicon allowing for use of a higher tempering temperature.