Mofuta oa 347 (UNS S34700) ka har'a li-tubing tse kopantsoeng
Tlhaloso
Li-tubing tse 347 tsa tšepe e sa hloekang
Type 347 ke niobium stabilized chromium nickel austenitic stainless steel e nang le khanyetso ea kutu e ts'oanang le 304/304L.Kereiti ena hangata e sebelisoa ka har'a mocheso oa 800-1500˚F moo o tsitsitseng khahlanong le pula ea chromium carbide ka ho eketsoa ha niobium, e leng se fellang ka ho na ha niobium carbides.Mofuta oa 347 o na le khanyetso e ntle haholo ea "intergranular corrosion resistance" ka mor'a ho pepesehela mocheso ona, 'me sehlopha sena se hanana le oxidation ho fihla ho 1500˚F mme se na le thepa e phahameng ea ho phunyeha le khatello ea maikutlo ho feta 304/304L.E boetse e na le boima bo botle ba mocheso o tlase ebile ha e na makenete maemong a annealed.
Li-tubing tse 347 tsa tšepe e sa hloekang
Sebopeho sa Lik'hemik'hale
Meeli ea sebopeho sa lik'hemik'hale (wt%) joalo ka ha ho boletsoe ho ASTM A240 le ASME SA240*.
| Element | 347 |
| Khabone | 0.08 |
| Chromium | 17.0-19.0 |
| Nickel | 9.0-13.0 |
| Manganese | 2.00 |
| Silicone | 0.75 |
| Phosphorus | 0.045 |
| Sebabole | 0.030 |
| Niobium | 10 x C mets / 1.00 max |
Thepa ea MechiniLi-tubing tse 347 tsa tšepe e sa hloekang
Litlhoko tsa thepa ea mochini bakeng sa sehlahisoa se kentsoeng joalo ka ha ho boletsoe ho ASTM A240 le ASME SA240.
| Thepa | 347 |
| Kotulo Matla, min.(ksi) | 30 |
| Matla a Tensile, min.(ksi) | 75 |
| Elongation, min.(%) | 40 |
| Ho thatafala, max.(Rb) | 92 |
Lintho Tsa 'Mele
Thepa ea 'mele bakeng sa tšepe ea mofuta oa 347
| Thepa | 347 Lintlha |
| Density, lb/in3 | 0.288 |
| Modulus ea Elasticity, psi | 28.0 x 106 |
| Coefficient of Thermal Katoloso, 68-212˚F, /˚F | 9.3 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.2 |
| Mocheso o khethehileng, Btu/lb ˚F | 0.12 |
| Motlakase Resistivity, Microohm-in | 28.4 |
Litekanyetso
Litekanyetso tse tloaelehileng tsa tšepe ea mofuta oa 347
| 347 |
| ASTM A240 |
| ASME SA240 |
| AMS 5512 |
Nako ea poso: Apr-22-2023