Shaoxing Shangyu Pier Steel Ball Co., Ltd

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Stainless Steel Ball

	201
	304
	316
	420
	440

STAINLESS STEEL KNOWLEDGE

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Definition: containing more than 12% of chromium, which are resistant to chemical substances against steel.
Principle: Stainless steel is not no rust, but rust is not easy. The principle is to rely on chromium additions, in the steel surface layer of organized dense chromium oxide layer can effectively block the re-steel contact with air so that oxygen in the air can not enter steel, the steel to achieve the prevention of Health rust effect.

Category: Chinese National Standards (CNS), Japanese Industrial Standards (JIS) and the American Iron and Steel Institute (AISI) figures to show that the use of three different stainless steel, and is widely quoted by the industry to do, of which 200, Department of Chromium - Nickel - Manganese austenitic stainless steel, 300, Department of chromium - nickel austenitic stainless steel, 400 stainless steel's Department of chromium (commonly known as stainless iron), including the martensite and ferrite.
In addition, there are the use of composition, permeability, whether heat treatment and steel hardening kinds of numbers to classify, classification methods, such as the table below:

Ingredients Category		Organization Classification	Heat	Magnetic	Features
Large Category	Small Category
Cr Chromium	Low C-23Cr	Martensite	May be hardening heat treatment	Magnetic	Low Hardness
	Middle C-23Cr				The hardness
	High C-27Cr				Hardness
	Low C-23Cr	Ferrite	Non-heat-treatment	Non-magnetic	Low resistance to corrosi
	Middle C-23Cr				In the corrosion resistance
	High C-27Cr				High Corrosion Resistance
Cr-Ni	18Cr-8Ni	Austenite	Non-heat-treatment	Non-magnetic	Standard
	Adding Mo, Cu				Good resistance to pitting of
	Adding Ni				Cold nature of good
	Adding Cr, Ni				Excellent high temperature oxidation
	Low-Ni-precipitation hardening	Martensite	Precipitation hardening heat treatment can be	Magnetic	High Strength
	Middle-Ni-precipitation hardening	Half austenite
	High-Ni-precipitation hardening type	Austenite		Non-magnetic
	25Cr-5Ni-Mo	Austenite	Non-hardening heat treatment	Magnetic	Fluoride should be good corrosion resistance
Mn-Cr-Ni	7Mn-18Cr-5Ni	Two-phase body	Non-hardening heat treatment	Non-magnetic	High intensity

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