Knowledge of stainless steel introduction, useful, you understand!

Stainless steel definition
Stainless steel is one kind can revolt cankerous tall alloy steel. Have beautiful appearance, need not pass plating color or paint substandard expresses processing, so a lot of machinery plants are indicate from is stainless steel, do not make any paint processing normally, and black capable person (alleged black capable person is namely normally steely title) be to be necessary to undertake antirust processing.

The handy classification of 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 the most commonly used, 200 series and the substitute that 400 series are 300 series on certain Cheng, and will 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 sort that sees at most in 300 series, the quote that can judge an all stainless steel from the quote change of 304 normally so goes situation. 200 series contain nickel little, 400 series do not contain nickel, 300 series contain nickel most, suffer nickel price to affect so the biggest is 300 series.

300 series can brief cent is 304, 304L, 316, 316L, 321, 309S, 310S is waited a moment, the content that divisional basis is all sorts of tantalum is not identical, the character of the stainless steel with not identical content is not identical also, the 304 difference with 304L depend on carbon (C) of content not identical, 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, the most important is coil and board. Profile is namely by board of make it all sorts of not identical model the data of shape, have angle iron, flat steel, I-steel, channel. If steel tube head points to seamless steel tube, with seamless steel tube opposite is solder canal namely, difference depends on shaping. Component is principal it 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 namely, plank is a piece a piece, if leave factory,be plank namely, also call former outfit board, it is thick normally board, as a result of very thick word, it is to cannot be become coil, normally 16 millimeter above cannot be become coiled.

Have coil, have board, a lot of time are board, coil and board quote also is not identical, if be to buy,coil, weigh heavy business accounting by practice namely, quoted price is so high, board be business accounting of according to theory, quoted price is low, the element is to have next difference, be like the practice with thick 10mm may be 9.6mm, this center can have price difference.

Stainless steel board basis rolling mill (the machine name that rolling mill is rolling board) of rolling technology not identical, hot-rolling of share out bonus and cold rolling, hot-rolling normally mark is 2B for mark of NO.1 cold rolling probably BA(BA is better than the appearance of 2B, should shine, get close to mirror, first-rate is lens face namely, lens face does not have merchandise on hand, demand machines) , for example a lot of 304 time are to buy board, that is meant roll be necessary to leave through the machine make the same score board means, this kind of machine is an equal opportunity namely. Make the same score through opening equal opportunity can open not identical length, if not be traditional length,make be decided, the meaning is to drive measure surely namely, because client basis fulfils requirement, constant regular meeting puts forward not identical length to request, this time coils to appear important, of the convention board cannot satisfy a request.

Homebred cold rolling is normally under 3 millimeter, hot-rolling is in normally 3 millimeter above, of 3 millimeter ply have hot-rolling already, also have cold rolling, can be of the entrance ply of cold rolling board can arrive at 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 namely.
Stainless steel board the method of handy 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 chosen 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) , want accurate to decimally hind two, because stainless steel quote is expensive, trade the amount is large, decimally the number after is very significant also, consequently debt also wants accurate to decimally hind two.
The proportion of stainless steel (KG)
Not identical stainless steel has not same 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 not identical, what bazaar often contacts is our country and United States, make GB and beautiful bid, the 200 series that mention above 300 series 400 series are beautiful mark namely, because beautiful mark is straightaway, what cry normally so is beautiful mark.
GB============Beautiful mark
1cr17mn6ni5n========201
1cr18mn8ni5n========202
0cr18ni9============304
00cr19ni10==========304L
0cr18ni12mo2t=======316Ti
00cr17ni14mo2=======316L
0cr17ni12mo2========316
1cr18ni9ti==========321
0cr18ni10ti=========321
0cr23ni13===========309S
1cr20ni14===========309S
0cr25ni20===========310S
1cr25ni20===========310s
0cr13===============405
1cr13===============410
2cr13===============420
3cr13===============420
4cr3================430
The elemental content in GB title is the central value that points to content normally, for theoretical value, but can small.
What calls public service
This is a very important name, public service is accepted namely the length that agree or ply deviation. Because be in of plank produce in the process, it is very difficult to stem from all sorts of elements. The practice ply that come out is the ply of short of theory normally, for example of 6 millimeter board, want 5.6 millimeter only, this is public service namely, in home public service is negative public service namely normally, also have of course public service, can be very few. It is when business board, it is to talk ply to come normally normally business accounting, this also is the factor that for what theory valence comparing weighs high price is low, public service still has the branch of large and small, quoted price is not same also, the quote of great public service is cheap. Illustrate, of 6 millimeter, if be 5.5 be great public service namely below.
1, dimensions of 304/2B public service sees next tables (offer reference only)
Standard
Big difference
Normal
Little difference
Without public service
0.4MM
0.3-0.32
0.33-0.37
0.37-0.39
0.39 above
0.5MM
0.4-0.42
0.43-0.47
0.47-0.49
0.49 above
0.6MM
0.5-0.52
0.53-0.57
0.57-0.59
0.59 above
0.7MM
0.6-0.62
0.63-0.67
0.67-0.69
0.69 above
0.8MM
0.7-0.72
0.73-0.77
0.77-0.79
0.79 above
0.9MM
0.8-0.82
0.83-0.87
0.87-0.89
0.89 above
1.0MM
0.89-0.91
0.91-0.94
0.94-0.99
0.99 above
1.2MM
1.01-1.08
1.09-1.15
1.16-1.18
1.18 above
1.5MM
1.32-1.38
1.39-1.45
1.46-1.48
1.48 above
2.0MM
1.71-1.79
1.8-1.86
1.87-1.9
1.9 above
2.5MM
2.23-2.38
2.39-2.42
2.42-2.47
2.47 above
3.0MM
2.7-2.77
2.78-2.85
2.85-2.9
2.9 above
2, watch of dimensions of hot-rolling board public service sees next tables (offer reference only)
Standard
Big difference
Normal
Little difference
Without public service
3.0MM
2.6-2.75
2.75-2.85
2.86-2.9
2.9 above
4.0MM
3.2-3.6
3.6-3.75
3.75-3.95
3.95 above
5.0MM
4.2-4.6
4.6-4.75
4.75-4.95
4.95 above
6.0MM
5.1-5.5
5.5-5.75
5.75-5.9
5.9 above
8.0MM
7.2-7.5
7.5-7.75
7.75-7.95
7.9 above
10.0MM
9.1-9.3
9.3-9.6
9.6-9.85
9.85 above
12.0MM
11.1-11.2
11.2-11.6
11.6-11.85
11.85 above
14.0MM
13.1-13.2
13.2-13.6
13.6-13.85
13.85 above
The character of sort of principal stainless steel and good
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 picture of heat treatment sclerosis, without magnetism, use temperature 0 times 193 degrees arrive 800 degrees.
Good: ?

304L regards mild as 304 steel, in normally condition falls, be able to bear or endure corrode sex and 304 about the same, but mix after solder after eliminating stress, it fights a brilliant caustic 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 normally apply,
Good: Petrifaction industry, building materials.

321 Ti element adds 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 merchandise that heat treatment does not have after soldering, because attend Ti element, the unsuited food that make 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 good all the more, 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 equipment, contrary brilliant is corroded have the merchandise that requests all the more.

309S/310S these two kinds of raw material, nickel and chromic content are higher, add the content of Si together, make its are had high temperature resistant and be able to bear or endure corrode sex, meantime 309S can be accepted 980 repeat below heat, 310S applies temperature to arrive at 1200 degrees, apply temperature to be able to be in 1150 degrees continuously, without magnetism.
Good: Equipment of applicable muffle furnace, the crucial position such as dryer, furnace uses a data, aviation, petrifaction, electric power.

200 series are similar to economy of 304 quote petty gain.
Good: ?  of  of blessing of uncut jade of ど of commonplace of settleclear adze of  of blessing of Ke Pu of  of  of Xi of human skeleton of て of settleclear adze commonplace is like  of the first month of Tuo of  of Xu of calm of sole  D  of sole of  of person of  of  of Mei of  of salary of the dumb hurry that punish  is planted duckweed bows with hands clasped to  of Xu of target of Lu  ㄗ leavessing of pulse plants, endurance is inferior to 304,