Stainless hlau AISI 317L (1.4438) yog cov pa roj carbon austenitic tsawg nrog cov ntsiab lus chromium (txog 18 feem pua) thiab npib tsib xee (txog 13 feem pua). Qhov feem pua ntawm cov pa roj carbon hauv cov hlau tsis pub tshaj 0.03 feem pua , thiab nws tau ua tiav los ntawm cov hlau, sawv cev rau cov khoom siv ntawm cementite hauv cov hlau matrix. Los ntawm cov qib no, cov hlau yog tus cwj pwm los ntawm qhov siab (txog 3 feem pua) cov ntsiab lus molybdenum.
Cov tshuaj muaj pes tsawg leeg ntawm cov alloy txiav txim siab nws cov yam ntxwv hauv qab no:
Ua kom muaj zog tiv thaiv corrosion, nrog rau qhov kub thiab txias.
High acid kuj.
Lub zog ntawm qhov siab mus rau 1300… 18000С kub ntawm kev ua haujlwm ntev ntawm cov khoom.
Durability nyob rau hauv ntev loads, tsis tshaj lub tensile lub zog.
Txaus siab weldability.
International sib npaug
| Mark | Analogue | W. Nr. | Aisi Uns | En |
|---|---|---|---|---|
| 03Х19Н13М3 | 1.4438 | 317L | X218-5-4 | |
| ~1.4438 | ~317L | X2CrNiMo18-15-4 |
Mechanical zog ntawm 1.4438, AISI 317L
Tensile zog, Rm: 500 - 700 MPa
The yield point, Rp0,2: >200 MPa
Elongation, A:>40 feem pua
Modulus ntawm elasticity, E: 200 GPa
Hardness, HB:<215
Kev tiv thaiv tshwj xeeb, Ω: 0.85 mkOhm * m
Kev cuam tshuam tsis kam, KV:> 60J
Linear expansion coefficient, : 16.0 * 10-6 K-1
Thermal conductivity, λ: 14.0 W * m-1 * K-1
Thermal peev, cp: 500 J * kg-1 * K-1
| Kub (degree) | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 |
|---|---|---|---|---|---|---|---|---|---|---|
| Modulus ntawm elasticity, E (GPa) | 194 | - | 186 | - | 179 | - | 172 | - | 165 | - |
| Qhov taw qhia tawm, Rp0,2 (MPa) | >172 | >157 | >147 | >137 | >127 | >120 | >115 | >112 | >110 | >108 |
| Linear expansion coefficient, (* 10-6 K-1) | 16.0 | - | 16.5 | - | 17.0 | - | 17.5 | - | 18.0 | - |
Kev kho cua sov thiab yas ntawm 1.4438, AISI 317L
forging thiab dov ntawm qhov kub thiab txias 1150 - 800 degree
Supersaturation ntawm 1020 - 1100 degree
Cim npe nrov: 1.
