347 niobium continens ferrum austeniticum inactum est, 347H est eius alta versio carbonis. In verbis compositionis;347videri potest stannum a addito niobium usque ad basin 304 sine ferro. Niobium est rara terrae elementi quae titanium similiter gerit. Cum ad mixturam accessit, structuram frumenti expolire potest, corrosioni intergranulare resistere, et vetustatem indurationem promovere.
.Corresponding to nationalis signa
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 COMPOSITIONE S34700 Aliquam ferro talea
Gradus | C | Mn | Si | S | P | Fe | Ni | Cr |
347 | 0.08 max | 2.00max | 1.0 max | 0.030max | 0.041 max | 62.74 min | 9-12max | 17.00-19.00 |
347H | 0.04 - 0.10 | 2.0 max | 1.0 max | 0.030 max | 0.041 max | 63.72 min | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H Aliquam ferro talea Mechanica Properties
Density | Liquefactio Point | Distrahens fortitudo (MPa) min | 0,2% Probatur (MPa) min | Prolongatio (% in 50mm) min |
8.0 g/cm3 | 1454 °F . | Psi - 75000 , MPa - 515 | Psi - 300000 , MPa - 205 | 40 |
.Material possessiones
① Egregia corrosio resistentia comparabilis ferro immaculata 304.
Inter 427~816℃, formationem chromi carbidam inhibere potest, sensibilizationi resistere et bene repugnantiam ad corrosionem intergranulare.
Adhuc quaedam resistentia serpunt in ambitu valido oxidificationis cum caliditate 816℃.
④ Facilis ampliandi forma, facilis pactione.
Bonus humilis temperatus durities.
.Application occasiones
Summus temperatus observantia347&347Hchalybs immaculata melior est quam 304 et 321. In aeroplanis, petrochemicis, cibis, papyris et aliis industriis in usu est, quales sunt fistulae principales et fistulae ramorum machinarum aircraft, fistulae gasorum calefactarum ex turbine compressorum, et in oneribus parvis. et temperaturas non excedentes 850°C. Partes laborantes sub conditionibus, etc.
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Post tempus: May-11-2024