ASTM A240 Txuj rau Stainless Hlau Phaj, Sheet, thiab Sawb
Oct 27, 2023
ASTM A240 Standard Specification rau Chromium thiab Chromium-Nickel Stainless Hlau Phaj, Sheet, thiab Sawb rau Cov Nkoj Siab thiab rau Kev Siv Dav Hlau
ASTM A240 Txuj rau Stainless Hlau Phaj, Sheet, thiab Sawb yog dav pom nyob rau hauv kev lag luam raws li cov lus qhia meej rau cov specification ntawm stainless hlau khoom. Cov txheej txheem npog ntau qib ntawm stainless hlau, suav nrog austenitic, ferritic, thiab martensitic stainless hlau.
Ib qho txiaj ntsig tseem ceeb ntawm ASTM A240 Standard yog tias nws muab txoj hauv kev los ntsuas thiab ntsuas cov khoom ntawm cov khoom siv hlau tsis zoo xws li astm a240 hom 304 phaj, astm a240 hom 316 daim ntawv thiab astm a 240 321 strip. Qhov no ua rau nws yooj yim rau cov tuam txhab thiab cov neeg siv kom ntseeg tau tias lawv cov khoom siv a240 ua tau raws li cov qauv xav tau, thiab sib piv cov khoom sib txawv.
ASTM A240 Stainless Hlau Phaj yog cov khoom siv feem ntau hauv ntau qhov kev lag luam, suav nrog kev lag luam petrochemical, tshuaj lom neeg, thiab zaub mov kev lag luam. Cov ss daim hlau zoo li ss304 daim hlau yog tsim los tiv taus qhov kub thiab txias, ua rau lawv zoo tagnrho rau siv hauv cov hlab ntsha siab.
Muaj ntau ntau qib sib txawv ntawm cov hlau tsis muaj steel uas poob raws li ASTM A240 Standard, txhua tus muaj nws tus kheej cov khoom thiab cov yam ntxwv. Qee cov qib siv feem ntau suav nrog 304/304L, 316/316L, 321, thiab 347.
Qib ntawm stainless hlau uas siv yuav nyob ntawm qhov tshwj xeeb daim ntawv thov thiab cov kev xav tau ntawm cov khoom. Piv txwv li, austenitic stainless hlau feem ntau siv rau hauv cov ntawv thov uas yuav tsum tau muaj kev tiv thaiv corrosion thiab siab zog, thaum ferritic stainless hlau feem ntau siv rau hauv cov ntawv thov uas zoo formability thiab weldability tseem ceeb.
Ntxiv nrog rau tandardization ntawm cov khoom qib, ASTM A240 Standard kuj qhia txog cov kev cai rau cov khoom siv, tshuaj muaj pes tsawg leeg, thiab lwm yam tseem ceeb ntawm cov khoom. Qhov no ua kom ntseeg tau tias tag nrho cov khoom siv a240 uas ua tau raws li tus qauv zoo ib yam ntawm lawv qhov zoo thiab kev ua haujlwm.
ASTM A240 Txuj yog cov lus qhia tseem ceeb rau kev tsim thiab siv cov khoom siv hlau tsis zoo xws li 304 daim ntawv,a240 316l kub dov stainless hlau phajthiab904l ua. Los ntawm kev muab cov txheej txheem rau kev qhia tshwj xeeb thiab kev ntsuam xyuas ntawm cov khoom no, nws yuav pab kom ntseeg tau tias lawv ua tau raws li cov qauv siab uas xav tau los ntawm kev lag luam thiab tsim nyog rau kev siv ntau yam kev siv.
Tshuaj muaj pes tsawg leeg
|
Element |
304 |
316 |
321 |
904L |
|
Cov pa roj carbon |
0.07 |
0.08 |
0.08 |
0.02 |
|
Manganese, max |
2.00 |
2.00 |
2.00 |
2.00 |
|
Phosphorus, max |
0.045 |
0.045 |
0.045 |
0.045 |
|
Sulfur, max |
0.030 |
0.030 |
0.030 |
0.035 |
|
Silicon |
0.75 |
0.75 |
0.75 |
1.00 |
|
Chromium |
17.50 - 19.50 |
16.00 - 18.00 |
17.00 - 19.00 |
19.00 - 23.00 |
|
Nickel |
8.00 - 10.50 |
10.00 - 14.00 |
9.00 - 12.00 |
23.00 - 28.00 |
|
Molybdenum |
... |
2.00 - 3.00 |
... |
4.00 - 5.00 |
|
Nitrogen |
0.10 max |
0.10 max |
0.10 max |
0.10 max |
|
Tooj, max |
... |
... |
... |
1.00 - 2.00 |
|
Titanium |
... |
... |
5 x (C+N) - 0.70 |
... |
Mechanical Properties
|
Hom |
Tensile zog, ksi, |
Yield zog, ksi, |
Elongation,% |
Hardness, |
|
304 |
75 |
30 |
40 |
201 PAB or 92 HNB |
|
316 |
75 |
30 |
40 |
217 AWG or 95 PAB |
|
321 |
75 |
30 |
40 |
217 AWG or 95 PAB |
|
904L |
71 |
31 |
35 |
95 PAB |
