347 ndeye niobium-ine austenitic simbi isina tsvina, nepo 347H iri iyo yakakwira kabhoni vhezheni. Panyaya yekuumbwa,347inogona kuonekwa sechigadziko chinobva pakuwedzera niobium kusvika pakadzika 304 simbi isina tsvina. Niobium chinhu chisingawanikwe pasi pano chinoshanda zvakafanana kune titanium. Kana yawedzerwa kune alloy, inogona kunatsa chimiro chezviyo, kuramba intergranular corrosion, uye kukurudzira kuoma kwezera.
Ⅰ.Inoenderana nemitemo yenyika
| China | GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | ASTM A240-15a | S34700,347 | S34709,347H |
| JIS | J1S G 4304:2005 | SUS 347 | - |
| DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ.CHEMICAL COMPOSITION OF S34700 Stainless steel bar
| Giredhi | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 max | 2.00max | 1.0 max | 0.030max | 0.045 max | 62.74 min | 9-12max | 17.00-19.00 |
| 347H | 0.04 - 0.10 | 2.0 max | 1.0 max | 0.030 max | 0.045 max | 63.72 min | 9-12max | 17.00 - 19.00 |
Ⅲ.347 347H Stainless simbi bha Mechanical Properties
| Density | Melting Point | Tensile Simba (MPa) min | Goho Simba 0.2% Uchapupu (MPa) min | Elongation (% mu50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi - 75000 , MPa - 515 | Psi - 30000, MPa - 205 | 40 |
Ⅳ.Zvinhu
①Yakanakisa corrosion kuramba inofananidzwa ne304 simbi isina tsvina.
② Pakati pe427 ~ 816 ℃, inogona kutadzisa kuumbwa kwechromium carbide, kuramba kukurudzirwa, uye ine kuramba kwakanaka kune intergranular corrosion.
③Ichiri nekamwe kakukambira kuramba munzvimbo yakasimba oxidizing ine tembiricha yepamusoro ye816℃.
④Iri nyore kuwedzera uye kuumba, nyore kupinza.
⑤Good low tembiricha kuoma.
Ⅴ.Nguva dzekushandisa
Kushanda kwepamusoro-tembiricha ye347&347Hsimbi isina tsvina iri nani pane iyo ye304 uye 321. Inoshandiswa zvakanyanya mundege, petrochemical, chikafu, mapepa uye mamwe maindasitiri, senge pombi huru dzekuburitsa uye mapaipi ebazi einjini dzendege, gasi rinopisa pombi dzeturbine compressors, uye mumitoro madiki. uye tembiricha isingadariki 850°C. Zvikamu zvinoshanda pasi pemamiriro ezvinhu, nezvimwewo.
Nguva yekutumira: May-11-2024