1 stainless steel is defined
Stainless steel is one kind can resist cankerous tall alloy steel. Have beautiful appearance, need not adopt plating look or paint substandard expresses processing, so a lot of machinery plants are indicate oneself is stainless steel, often do not make any paint processing, and black capable person (alleged the title that black capable person is general iron and steel) it is indispensible should undertake antirust processing.
The simple and easy classification of 2 stainless steel
Stainless steel can be divided easy to read and understandly for 200 series, 300 series and 400 series 3 kinds big, meantime 300 series are more commonly used, 200 series the substitute that with 400 series sure meeting makes 300 series, and come up strictly tell 400 series not to make stainless steel, make do not become rusty iron, as a result of inside do not contain nickel element, use magnet to be able to be attracted so. And 200 series and 300 series have nickel, do not have magnetism so, suck iron to be not sucked.
304 it is the commonner sort in 300 series, change from the price of 304 commonly so can the value that differentiate gives line of whole stainless steel goes situation. 200 series contain nickel little, 400 series do not contain nickel, 300 series contain nickel more, because this suffers nickel price effect,bigger is 300 series.
300 series can brief cent is 304, 304L, 316, 316L, 321, 309S, 310S is waited a moment, the content that the basis of difference is all sorts of tantalum is different, the character of the stainless steel with different content is not identical also, the 304 difference with 304L depend on carbon (C) of content different, those who take L is to make clear contain carbon low, also make low carbon, the 316 difference with 316L also are identical
The configuration of stainless steel is classified
Stainless steel can be divided to coil board, plank, profile, steel tube and component 5 kinds big, more important is coil and board. Profile is by board of make it all sorts of differring model the material of shape, have angle iron, flat steel, I-steel, channel. Steel tube basically is to point to seamless steel tube, with seamless steel tube opposite is solder canal, difference depends on whether shaping. Component basically is to point to bend and flange and other dot.
Roll on material and plank practice identical, leave factory way is not same stopped, roll material is hank hank, plank is a piece a piece, if leave factory,be plank, also call former outfit board, it is thick commonly board, as a result of very thick word, it is to cannot be become coil, 16 millimeter above cannot become normal case coiled.
Have coil, have board, it is more normally board, coil and board the price also is not identical, if be to buy,coil, say to weigh business accounting by practice namely, the price is so high, board be business accounting of according to theory, the price is low, the reason is. Be like the real possibility with large 10mm is 9.6mm, there can be price difference among this.
Stainless steel board basis rolling mill (the machine name that rolling mill is rolling board) of rolling craft different, cent becomes hot-rolling and cold rolling, hot-rolling is general mark is 2B for mark of NO.1 cold rolling probably the appearance that BA(BA compares 2B is good, should shine, be close to a mirror, better is lens face, lens face does not have merchandise on hand, need to machine) , for instance 304 it is to buy normally board, that is meant roll must leave through the machine make the same score board means, this kind of machine flies smooth plane namely. Make the same score the length that can leave to differ through opening equal opportunity, if not be traditional length,make be decided, the meaning drives measure surely namely, because client basis fulfils need, constant regular meeting puts forward different length to ask, this moment coils to appear important, of the convention board cannot satisfy a requirement.
Homebred cold rolling is commonly under 3 millimeter, hot-rolling is in commonly 3 millimeter above, of 3 millimeter ply have hot-rolling already, also have cold rolling, but the cold rolling of the entrance board ply can achieve 4 millimeter the following and even 6 millimeter are the following. 3 millimeter go to hot-rolling of 12 millimeter board make medium plate, of 12 millimeter above cry thick board, can thick to 120 millimeter above, in weighing hot-rolling thick board, and cold rolling is cold rolling thin plate.
Stainless steel board the method of simple and easy business accounting of academic heft
Board ply of × of heavy = proportion (Mm) × width (M) × length (the unit that M)(mm is millimeter, m is the unit of rice)
In project machinery category as a result of fastidious precision measure, millimeter is used to be an unit on the world rice of 1000 millimeter =1, silk of 1 millimeter =100.
The heft that by this formula reachs is kilogram (KG) , should arrive accurately decimally hind two, because stainless steel price is expensive and often have wave motion, business amount is large, decimally the number after is very significant also, consequently debt also should arrive accurately decimally hind two.
The proportion of stainless steel (KG)
Different stainless steel has different proportion:
A, 400 series proportion is 7.75
B, 304.321.304N.201.202.304L. .301. Specific gravity is 7.93
C, 310S.309S.316.316L proportion is 7.98.
Contrast with steel grade watch
World each country has each to the title of stainless steel different, what bazaar often contacts is China and United States, make GB and beautiful bid, the 200 series that mention above 300 series 400 series are beautiful mark, because beautiful mark is straightaway, what cry commonly so is beautiful mark. = beautiful mark
201 202 304 304L 316Ti 316L 316 321 321 309S 309S 310S 310s 405 410 420 420 430
What calls public service
This is a very important name, public service is accepted the length that agree or ply error. Because be in of plank produce in the process, it is very difficult to stem from all sorts of reasons. The practice ply that come out often is the ply of short of theory, for example of 6 millimeter board, want 5.6 millimeter only, this is public service, in home public service often loses public battle namely, also have of course public service, can be very few. It is when manufacturing board, it is to talk ply to come normally commonly business accounting, this also is why the reason with academic lower than weighing high price price, public service still has the branch of large and small, the price is different also, of great public service low-cost. Illustrate, of 6 millimeter, if be 5.5 be great public service below.
The character of stainless steel breed and utility
304: Regard a kind of good as comprehensive steel products, have be able to bear or endure crackajackly corrode sex, hear resistance, microtherm intensity and mechanical sex, punch, it is good to wait for hot-working sex zigzag, without phenomenon of heat treatment sclerosis, without magnetism, use temperature 0 times 193 degrees arrive 800 degrees.
Good: ?
304L regards mild as 304 steel, below general position, be able to bear or endure corrode sex and 304 about the same, but mix after solder after eliminating stress, its corrosion resistance is good, below the case that did not have heat treatment, also can insist to be able to bear or endure crackajackly corrode sex, fall in 400 degrees commonly apply,
Good: Petrifaction industry, building materials.
321 Ti element is added in 304 steel, will avoid a brilliant to corrode, apply to 430 to 900 degrees the following, without magnetism;
Good: Car exhaust, heat exchanger, the container product that heat treatment does not have after soldering, because attend Ti element, unsuited production food machines equipment.
316 low carbon, add MO element, so his be able to bear or endure corrode sex and be able to bear or endure sex of atmospheric corrosion t and function of high temperature intensity are particularly good, can apply below severe exacting condition, suit to be applied below in 900 degrees, without magnetism.
Good: The device that uses in seawater, chemical industry, dye, papermaking, acetic acid, fertilizer produce equipment, food industry and foreland establishment, contrary brilliant corrodes the product that has special demand.
309S/310S these two kinds of raw material, nickel and chromic content are higher, add the content of Si at the same time, make its are had high temperature resistant and be able to bear or endure corrode sex, among them 309S can bear 980 degrees repeat below heat, 310S applies temperature to achieve 1200 degrees, apply temperature to be able to be in 1150 degrees one after another, without magnetism.
Good: Equipment of applicable muffle furnace, the crucial position such as dryer, furnace uses resource, aviation, petrifaction, electric power.
200 series are similar to 304 low-cost economy.
Good: Food machines household utensils, galley equipment, food machines equipment, filter, milk canister, durable consumer goods, washing machine fittings, water heater, steeliness furniture, ark of stainless steel wine, building decorate, stainless steel screen, decorate. Be able to bear or endure fatigued and weak respect, 201 hardness are bigger, endurance is inferior to 304, or of 304 be able to bear or endure fatigued and weak degree any better.
