So is what apply on industry the most frequent are there those stainless steel products? The classified method with stainless steel simple material is very much, organize classification according to metallographic among them most general, all sorts of capable person that organize classification by metallographic namely below are qualitative stainless steel of;1, ferrite. 2, austenite stainless steel. 3, austenite - stainless steel of ferrite double photograph. 4, martensite stainless steel. We know stainless steel is had not rust, acid-proof, high temperature resistant, wear-resisting and austenite do not have the characteristic such as magnetism commonly. Stainless steel is our common kind of advanced alloy steel, housing materials of kitchen utensils and appliances of the stainless steel cutting tool with if we are daily medium life, stainless steel eat, stainless steel.
In the stainless steel that we see daily, it is mostly 302, 304 wait for steel grade stainless steel mixes basic and identical nickel chromium not to become rusty iron, be in our country, the breed of stainless steel (steel grade) in 100 kinds of above, and the element in steel grade differs and content differs, its function and value are very different also. Accordingly, to stainless steel differentiate, do we need to pass different means method to differentiate its stand or fall? Small today make up teach everybody the stand or fall that a few methods differentiate stainless steel however!
One: Objective is differentiated, below the circumstance of ambiguous product model, according to the physics of commodity itself, chemistry, the appliance with simple have the aid of, using a sense organ to decide it is stainless steel perhaps belong to which kind of stainless steel.
2: Of colour and lustre differentiate
We know pickling is had wash stainless steel white function, but the color after the stainless steel pickling of different type passes differs somewhat, this differs with respect to the property that means them. Through the stainless steel of pickling, silvery white of exterior colour and lustre is bright and clean: Lubricious silvery white of chromic nickel stainless steel shows jade green; Chromic stainless steel is lubricious white a bit grey burnish is weak; The colour and lustre of stainless steel of chromic manganese nitrogen and likeness of chromic nickel stainless steel are a bit weak. Without the exterior colour and lustre of the stainless steel of pickling: Chrome-nickel steel shows palm white, chromium steel presents palm black, color of darkly of chromic manganese nitrogen (these 3 kinds of colour and lustre are the colour and lustre that shows oxidation is heavier) . Cold rolling the chromic nickel stainless steel without anneal, exterior silvery white has glance.
3: Differentiate with lodestone
We know because contain carbon to measure an element to have adsorptive sex accordingly more,magnet is, but the volume that contain carbon is high with respect to imply, its element is too active and easy with air medium pH indicator is contacted, bring about rusty, because great majority of our a lot of high grade stainless steel product are,use eletroplate or the form of finishing comes to those who raise it to fight corrode ability. Magnetite can distinguish two kinds of stainless steel basically. Because do not become rusty,iron all can be attracted by magnetite below any condition; And stainless steel however won't by magnet adsorption.
Above differentiates method specification a few kinds, can the abecedarian will undertake judging, and accuracy is not tall, and need a course for many times check. Much physical phenomenon, still know its not to know its the reason why however only, remain at be being discussed further. Should distinguish sort of stainless steel steel correctly actually the simplest method is to use stainless steel medicinal liquid!
