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Stainless Steel Information:

Type	Composition	Percentage	Description
17-4PH	Chromium: Nickel: Copper: Manganese: Silicon: Niobium: Tantalum: Carbon: Iron:	16.25% 4.00% 4.00% 1.00% 1.00% 0.30% 0.30% 0.07% Balance	One of the most widely used precipitation hardening stainless steels. It is soft and ductile in the annealed condition. When heat treated it has good corrosion resistance, high hardness, toughness and strength. Commonly used in aircraft and gas turbines, nuclear reactor, paper mill, oil field, and chemical process components.
17-7PH	Chromium: Nickel: Manganese: Silicon: Aluminum: Carbon: Iron:	17.00% 7.25% 1.00% 1.00% 1.00% 0.09% Balance	Another precipitation hardening stainless steel combining high strength, medium corrosion resistance. Used for applications requiring good strength, corrosion resistance and mechanical properties up to 800F. Is often used for intricate parts due to its low distortion in heat treatment. Very stable. Commonly found in a variety of springs and washers.
303	Chromium: Nickel: Manganese: Silicon: Molybdenum: Phosphorus: Carbon: Iron:	18.00% 9.00% 2.00% 1.00% 0.60% 0.20% 0.15% Balance	One of the most popular of all the stainless steels. It offers good strength, corrosion resistance and great machinability. Applications include hardware, fasteners, valve parts, nozzles and trim.
304	Chromium: Nickel: Manganese: Silicon: Carbon: Iron:	19.00% 9.25% 2.00% 1.00% 0.08% Balance	One of the most widely used and oldest of the stainless steels. This was originally called 18-8 for its chromium and nickel content. It possesses an excellent combination of strength, corrosion resistance. Almost every industry uses this material in some way. Everything from stovetops to ballpoint pen barrels to flatware to fasteners.
316	Chromium: Nickel: Molybdenum: Manganese: Silicon: Carbon: Iron:	17.00% 12.00% 2.50% 2.00% 1.00% 0.08% Balance	This stainless steel has increased molybdenum to increase resistance to corrosion. Widely used in industry, it was initially designed for paper mill machinery. It has been used in marine environments and industrial components.
321	Chromium: Nickel: Manganese: Silicon: Carbon: Titanium: Iron:	18.00% 10.50% 2.00% 1.00% 0.08% 5x C Balance	The key feature of 321 is its resistance to intergranular corrosion. It employs titanium to prevent carbide formation. The alloy has superior strength compared to 304 stainless. This alloys is used in jet engine parts, furnaces, expansion joints, turbochargers, oil refineries, exhaust manifolds and high temperature chemical production equipment.
347	Chromium: Nickel: Manganese: Silicon: Carbon: Niobium: Iron:	18.00% 11.00% 2.00% 1.00% 0.08% 5x C Balance	Similar to 321 stainless, 347 uses columbium to resist to intergranular corrosion. It can be used in applications requiring repeated heating in the range of 800F to 1650F. It is used in high temperature gaskets and expansion joints, rocket engine parts, exhaust manifolds and chemical production equipment.
410	Chromium: Manganese: Silicon: Carbon: Phosphorus: Sulphur: Iron:	12.50% 1.00% 1.00% 0.15% 0.04% 0.03% Balance	410 has good impact strength, corrosion and scaling resistance up to 1200 F. It is used in cutlery, steam and gas turbine blades and buckets, bushings, valve components, fasteners, screens and kitchen utensils.
416	Chromium: Manganese: Silicon: Molybdenum: Carbon: Sulphur: Iron:	13.00% 1.25% 1.00% 0.60% 0.15% 0.15% Balance	416 is a heat treatable stainless steel with excellent machinability and non-galling characteristics. It is magnetic in all conditions. It is used in a wide variety of screw machine parts including nuts, bolts, screws, gears and pinions, valve trim, shafts and axles. 416 is a free machining version of 410.

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