Alloy steel containing different proportions of alloy elements (such as manganese, silicon, nickel, titanium, copper, chromium, and aluminum), to control the properties of the steel, such as its hardenability, corrosion resistance, strength, formability, weldability and ductility.
WHAT IS ALLOY STEEL
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. Alloy Steels are made by combining elements during the smelting process when the iron is still molten. Chromium is added in smaller amounts (0.5-2%) to increase hardenability and larger amounts (4-18%) to increase corrosion resistance. Molybdenum is added in amounts of 0.25-0.40% to increase the strength of the steel. Nickel is added in smaller amounts (2-5%) to increase toughness and in larger amounts (12-20%) to increase corrosion resistance. Silicon is added to steel in smaller amounts (0.2-0.7%) to increase strength and in larger amounts (>2%) to improve its magnetic properties while addition of Sulfur or Lead is done to increase the weldability.>>>>>email: [email protected]
WHAT IS STAINLESS STEEL
Stainless steel is an alloy developed in the early 1900’s after metallurgists discovered that chromium added iron alloys displayed superior corrosion resistance to carbon steel alloys. The first products using stainless steel were produced in 1908 and the first patents were granted in 1912. Stainless Steel is a highly durable alloy containing the following major ingredients:
10 - 30 per cent of chromium by mass giving excellent corrosion and oxidation resistance to it.
Rest about more than 50 percent iron.
The corrosion resistance that is unique to stainless steel is the result of a transparent passive film of chromium oxide forms on the surface of the steel and protects it from oxidation. Higher chromium levels increase the corrosion resistance of the steel, but it creases the brittleness of the metal, making it hard to work with. There are different categories and types stainless steels.If you want to learn more about the difference between tool alloy steel and stainless steel, can send me email to [email protected]