316 vs 321 Stainless hlau: Dab tsi yog qhov txawv?
316 vs 321 Stainless hlau: Dab tsi yog qhov txawv?
Qhov sib txawv tseem ceeb ntawm 316 thiab 321 stainless hlau yog nyob rau hauv lawv cov khoom tseem ceeb: 316 muaj molybdenum, muab kev tiv thaiv zoo rau chloride / acid corrosion (tsim rau marine thiab tshuaj ib puag ncig); thaum 321 muaj titanium, muab siab dua - kub stability thiab tiv thaiv intergranular corrosion nyob rau hauv welded qhov chaw (tsim rau aerospace thiab pa systems). Rau qhov hnyav, av noo / tshuaj lom neeg ib puag ncig, xaiv 316; rau siab heev - daim ntawv thov kub, xaiv 321.
Dab tsi yog qib sib npaug rau 321 stainless hlau?
qib 304
321 stainless hlau nyob rau hauv lub xeev annealed yog sib npaug rau 304 qib. Yog tias welded qhov chaw ua los ntawm cov qib no tsis tau tshaj tawm -weld annealed, lossis yog tias daim ntawv thov kub ntawm 425-9000℃, 321 stainless hlau pom zoo corrosion kuj.
321 Stainless hlau
321 stainless hlau yog titanium-muaj austenitic chromium-nickel alloy. Piv nrog rau feem ntau cov hlau tsis muaj steel, cov hlau no muaj kev tiv thaiv corrosion zoo dua. Tsis tas li ntawd, nws nthuav tawm lub zog zoo tshaj plaws ntawm qhov kub thiab txias piv rau lwm yam stainless hlau. Yog li ntawd, 321 stainless hlau yog qhov zoo tagnrho rau siab - cov ntawv siv kub xws li cov khoom siv hluav taws xob, cov khoom sib txuas, thiab cov cub tawg.
316 Stainless hlau
316 stainless hlau yog molybdenum-muaj, qis-carbon austenitic chromium-nickel alloy. Piv nrog rau feem ntau cov hlau tsis muaj steel, cov hlau no muaj kev tiv thaiv corrosion zoo dua thiab tseem muaj lub zog zoo dua thaum kub kub. Nws cov ntsiab lus molybdenum kuj ua rau nws zoo heev rau pitting corrosion nyob rau hauv chlorinated ib puag ncig, ua rau nws zoo tagnrho rau corrosive ib puag ncig xws li cov khoom noj khoom haus los yog cov chaw kho mob.
Qhov sib npaug ntawm 321 thiab 316 Stainless Hlau
| GB / T | 321 | 316 |
|---|---|---|
| ASTM / UNS | 321 / S32100 | 316 / S31600 |
| EN | X6CrNiTi18-10 (1.4541) | X5CrNiMo17-12-2 (1.4401) |
| JIS | TIAB SA 321 | TIAB SA 316 |
| GOST | 08Х18Н10Т | 03Х17Н14М3 |
Chemical Composition ntawm 321 vs 316 Stainless hlau
| Element | Qib 316 Stainless Hlau | Qib 321 Stainless Hlau |
|---|---|---|
| C | 0.08 max | 0.08 max |
| Mn | max 2.00 Nws | max 2.00 Nws |
| Si | 0.75 max | 0.75 max |
| P | 0.045 max | 0.045 max |
| S | 0.030 max | 0.030 max |
| Cr | 16.00 – 18.00 | 17.00 – 19.00 |
| Ni | 10.00 – 14.00 | 9.00 – 12.00 |
| Mo | 2.00 – 3.00 | – |
| Ti | – | 5 * C – 0.70 |
Lub cev muaj zog ntawm 321 vs 316 Stainless Hlau
| Khoom | Qib 316 | Qib 321 |
|---|---|---|
| Qhov ceev (g / cm³) | 7.98 | 7.92 |
| Melting Point (zeeg) | 1398 – 1420 | 1398 – 1420 |
| Thaum tshav kub kub tshwj xeeb (J / kg·K) | 500 | 500 |
| Thermal conductivity (W / m · K) | 16.2 | 16.3 |
| Hluav taws xob tiv thaiv (µΩ·m) | 740 | 720 |
| Modulus ntawm Elasticity (GPa) | 193 | 193 |
| Poisson tus ratio | 0.3 | 0.3 |
| Thermal Expansion (10^-6 / K) | 16.5 – 16.7 | 16.5 – 16.9 |
Kev sib piv ntawm Corrosion Resistance ntawm 316 thiab 321 Stainless Hlau
316 Stainless hlau:316 stainless hlau muaj corrosion kuj heev.
321 Stainless hlau:Nws muaj qhov zoo corrosion kuj nyob rau hauv lub xeev intergranular, tab sis nws cov corrosion kuj tsis zoo nyob rau hauv siab - ntsev los yog acidic ib puag ncig.
Thaum tshav kub kub tsis kam ntawm 316 thiab 321 stainless hlau
316 stainless hlau:Nws tuaj yeem tiv taus kub txog 870 degrees Celsius, tab sis tsis yog rau lub sijhawm ntev.
321 stainless hlau:Tsim nyog rau kev raug mob mus tas li rau qhov siab - qhov kub thiab txias ntawm 870 txog 925 degrees Celsius.
Gnee Steel kuj muab kev cai stainless hlau 316 khoom nyob rau hauv ntau qhov ntau thiab tsawg thiab specifications. Thov xa koj cov duab kos rau peb rau kev tsocai!