1.5637 thiab X8CrNi25-21 txhais li cas
1.5637 yog cov khoom siv European tus lej ntawm austenitic stainless hlau uas nws lub npe tag nrho yog X8CrNi25-21. Lub npe tuaj yeem nyeem tau los ntawm lub ntsiab lus: X qhia tias muaj cov hlau alloy siab, 8 hais txog cov ntsiab lus carbon ntawm li 0.08%, CrNi qhia chromium thiab npib tsib xee, thiab cov duab 25 thiab 21 muab cov ntsiab lus chromium thiab npib tsib xee. Hauv Teb Chaws Asmeskas cov qib hu ua hom 310S, thiab nyob rau hauv kev sib sau ua ke nws tau them los ntawm cov qib stainless hlau ntawm 25% chromium, 20% nickel tsev neeg. Cov khoom siv tau txhais rau lub raj hauv EN 10216-5, tus qauv rau seamless stainless hlau raj rau lub hom phiaj siab.
Tshuaj muaj pes tsawg leeg 1.5637
| Element | Cov ntsiab lus (%) |
|---|---|
| Cov pa roj carbon (C) | max . 0.08 |
| Silicon (Si) | max . 1.50 |
| Manganese (Mn) | max . 2.00 |
| Phosphorus (P) | max . 0.045 |
| Sulfur (S) | max . 0.030 |
| Chromium (Cr) | 24.00 - 26.00 |
| Nickel (Ni) | 19.00 - 21.00 |
| Hlau (Fe) | tshuav nyiaj li cas |
Cov qauv austenitic tag nrho ua los ntawm cov chromium thiab nickel tshuav nyiaj li cas yog lub hauv paus ntawm qib cov khoom. High chromium forms a dense, adherent oxide that resists scaling, nickel stabilises the austenite so that the alloy does not become magnetic or brittle in service, and the low carbon limit reduces the risk of chromium carbide precipitation when the steel is held in the sensitising temperature range.
Oxidation Resistance thiab kub txwv
Lub zog ntawm 310S nyob hauv nws tus cwj pwm ntawm qhov kub thiab txias ntau dua li ntawm chav tsev kub. Cov qib tiv thaiv oxidation hauv kev pabcuam txuas mus txog li 1100 degrees Celsius, thiab hauv kev pabcuam sib cuam tshuam, qhov twg thermal cycling ua rau kev tiv thaiv oxide rau spill thiab hloov kho, qhov kev txwv qis dua, ntawm qhov kev txiav txim ntawm 1035 degrees Celsius. Nws kuj ua tau zoo nyob rau hauv kev txo thiab oxidising cua, nyob rau hauv combustion cov khoom uas muaj cov ntsiab lus sulfur thiab nyob rau hauv ntau carburising ib puag ncig, uas yog vim li cas nws tshwm nyob rau hauv lub cub tawg hardware, radiant tubes, muffle thiab retort Cheebtsam thiab thermocouple tiv thaiv sheaths. Qhov twg cov huab cua muaj zog sulfidising los yog muaj cov ntsev molten, cov hlau yuav tsum tau hloov los ntawm cov khoom siv ntau dua nickel.
310S thiab 310: Dab tsi S Suffix Tiag Tiag
S suffix hauv 310S tsis sawv ntsug rau stabilized. Nws txhais tau hais tias cov pa roj carbon tsawg ntawm qib 310, nrog cov pa roj carbon ntau tshaj ntawm 0.08% piv nrog cov ntsiab lus carbon siab dua ntawm tus qauv 310 qib. Cov pa roj carbon qis qis yog qhov kev hloov pauv tsis tu ncua: nws txo qis cov chromium carbide uas tuaj yeem tsim ntawm cov ciam teb thaum lub sij hawm vuam los yog thaum lub sij hawm ntev tuav hauv qhov sensitizing ntau, thiab yog li khaws cia corrosion kuj nyob rau hauv lub tshav kub cuam tshuam cheeb tsam. Stabilization ntawm stainless hlau yog ua tiav nrog titanium los yog niobium ntxiv, uas yog ib txoj kev sib txawv thiab tsis yog li cas 310S yog ua. Ib qho kev txheeb ze ze, 1.4845, yog tib lub npe X8CrNi25-21 steel lub npe nyob rau hauv cov khoom siv hluav taws xob kub, thaum 1.4841 yog ntau dua silicon variant npaj rau cov xwm txheej hnyav dua.
Cov Qauv, Cov Khoom Siv thiab Daim Ntawv Thov
Seamless raj rau 1.5637 yog tsim los rau EN 10216-5, nrog rau qhov sib npaug US raj specification yog ASTM A213 rau seamless heat exchanger thiab boiler raj thiab ASTM A312 rau welded thiab seamless austenitic yeeb nkab. Vim tias qib yog austenitic, nws tsis tuaj yeem hardened los ntawm kev kho cua sov thiab ntxiv dag zog los ntawm kev ua haujlwm txias, yog li cov raj feem ntau muab nkag rau hauv cov tshuaj annealed mob. Cov ntawv thov muaj xws li superheater thiab reheater txhawb cov raj, cov kab kub kub, cov raj rauv thiab cov kab hluav taws xob, cov khoom siv kho cua sov thiab cov pob tawb, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib txuas hauv cov kev pabcuam petrochemical. Fabrication yog ncaj nraim los ntawm cov qauv kev, tab sis cov khoom ua hauj lwm hardens sai, yog li khoov thiab machining xav tau hnyav dua tooling thiab dav dav radii tshaj carbon steel xav tau.
FAQ
Q: Dab tsi yog 1.5637 stainless hlau?
Nws yog cov khoom siv nyob sab Europe ntawm X8CrNi25-21, 25% chromium thiab 20% nickel austenitic stainless hlau hu ua 310S.
Q: Puas yog S hauv 310S txhais tau tias ruaj khov?
Tsis yog. Tus S qhia txog qhov qis carbon version ntawm qib, nrog carbon tuav mus rau qhov siab tshaj ntawm 0.08%. Stabilized stainless hlau yog cov uas muaj titanium lossis niobium ntxiv, uas tsis yog qhov no.
Q: Qhov kev pabcuam siab tshaj plaws ntawm 310S yog dab tsi?
Kev tiv thaiv oxidation tsis tu ncua txuas mus txog 1100 degrees Celsius, thaum qhov kev pabcuam cuam tshuam feem ntau txwv rau kwv yees li 1035 degrees Celsius vim yog oxide spalling thaum lub caij thermal cycling.
Q: 310S puas tuaj yeem ua kom tawv los ntawm kev kho cua sov?
Tsis yog. Cov hlau yog austenitic thiab tsis yog - hardenable los ntawm kev kho cua sov. Nws tsuas yog ntxiv dag zog los ntawm kev ua haujlwm txias, thiab nws ib txwm muab nkag rau hauv cov tshuaj annealed mob.
Q: Vim li cas 310S siv 304 lossis 316 thaum kub kub?
Nws cov ntsiab lus ntau dua chromium thiab npib tsib xee muab qhov ua tau zoo dua rau kev ntsuas thiab hloov cov qauv ntawm qhov kub thiab txias, uas cov qib qis alloyed tsis tuaj yeem sib xws hauv kev pabcuam kub tas li.
