316L Stainless hlau

Composition, yam ntxwv thiab kev siv

Yuav kom nkag siab 316L stainless hlau, ib qho yuav tsum xub nkag siab 316 stainless hlau.

316 yog austenitic chromium-nickel stainless hlau uas muaj ntawm ob thiab 3% molybdenum.Cov ntsiab lus molybdenum txhim kho kev tiv thaiv corrosion, nce kev tiv thaiv rau pitting hauv cov tshuaj chloride ion, thiab txhim kho lub zog ntawm qhov kub thiab txias.

316L Stainless hlau yog dab tsi?

316L yog qib qis carbon ntawm 316. Qib no yog tiv thaiv los ntawm sensitization (grain boundary carbide nag lossis daus).Nws yog siv tsis tu ncua nyob rau hauv hnyav ntsuas welded Cheebtsam (kwv yees li 6 hli).Tsis muaj qhov tseem ceeb ntawm tus nqi sib txawv ntawm 316 thiab 316L stainless hlau.

316L stainless hlau muaj kev nkag siab ntau dua, kev ntxhov siab rau kev tawg thiab lub zog tensile ntawm qhov kub siab tshaj li chromium-nickel austenitic stainless hlau.

Alloy Designations

Lub npe "L" tsuas yog txhais tau tias "tsawg carbon."316L muaj cov pa roj carbon tsawg dua 316.

Cov qauv tsim muaj xws li L, F, N, thiab H. Cov qauv austenitic ntawm cov qib no muab cov tawv tawv zoo heev, txawm tias nyob hauv qhov kub thiab txias.

304 vs. 316 Stainless hlau

Tsis zoo li 304 steel - qhov nrov tshaj plaws stainless hlau - 316 muaj kev txhim kho corrosion los ntawm chloride thiab lwm yam acids.Qhov no ua rau nws muaj txiaj ntsig zoo rau kev siv sab nraum zoov hauv ib puag ncig marine lossis cov ntawv thov uas muaj feem cuam tshuam rau cov tshuaj chloride.

Ob leeg 316 thiab 316L pom zoo corrosion kuj thiab lub zog ntawm qhov kub siab tshaj lawv 304 counterpart - tshwj xeeb tshaj yog thaum nws los txog rau pitting thiab crevice corrosion nyob rau hauv chloride ib puag ncig.

316 thiab 316L Stainless hlau

316 stainless hlau muaj cov pa roj carbon ntau dua 316L.316 stainless hlau muaj qhov nruab nrab ntawm cov pa roj carbon ntau thiab muaj nyob nruab nrab ntawm 2% thiab 3% molybdenum, uas muab kev tiv thaiv corrosion, acidic ntsiab lus, thiab kub kub.

Yuav kom tsim nyog raws li 316L stainless hlau, cov pa roj carbon ntau yuav tsum tsawg - tshwj xeeb, nws tsis tuaj yeem tshaj 0.03%.Qhov qis carbon qib ua rau 316L yog softer dua 316.

Txawm hais tias qhov sib txawv ntawm cov ntsiab lus carbon, 316L zoo ib yam li 316 nyob rau hauv yuav luag txhua txoj kev.

Ob leeg stainless hlau yog cov malleable heev, pab tau thaum tsim cov duab tsim nyog rau txhua qhov project tsis muaj kev tawg lossis tawg, thiab muaj kev tiv thaiv corrosion thiab siab tensile zog.

Tus nqi ntawm ob hom yog sib piv.Ob leeg muab kev ua haujlwm zoo, kev tiv thaiv corrosion, thiab yog cov kev xaiv zoo hauv cov ntawv thov kev ntxhov siab.

316L yog suav tias yog qhov zoo tshaj plaws rau ib qhov project uas yuav tsum tau muaj kev vuam ntau heev.316, ntawm qhov tod tes, tsis tshua muaj corrosion-resistant nyob rau hauv lub vuam (weld lwj) tshaj 316L.Hais tias, annealing 316 yog ib qho workaround rau tiv thaiv weld lwj.

316L yog qhov zoo rau kev kub-kub, kev siv corrosion siab, uas ua rau nws muaj koob meej hauv kev tsim kho thiab kev ua dej hiav txwv.

Ob leeg 316 thiab 316L muaj kev ua tau zoo heev, ua haujlwm zoo hauv kev khoov, ncab, sib sib zog nqus nqus, thiab tig.Txawm li cas los xij, 316 yog cov hlau nruj dua nrog lub zog tensile ntau dua thiab ductility piv rau 316L.

Daim ntawv thov

Nov yog qee qhov piv txwv ntawm kev siv 316L stainless hlau:

• • Khoom siv rau kev npaj zaub mov (tshwj xeeb tshaj yog nyob rau hauv ib puag ncig chloride)
• • Cov khoom siv tshuaj
• • Kev siv dej hiav txwv
• • Kev siv vaj tse
• • Kho mob implants (pins, screws thiab orthopedic implants)
• • Fasteners
• • Condensers, tanks, thiab evaporators
• • Tswj kev ua qias tuaj
• • Nkoj haum, tus nqi, thiab twj tso kua mis
• • Cov khoom siv hauv chav kuaj
• • Cov cuab yeej siv tshuaj thiab qhov chaw
• • Cov khoom siv yees duab (inks, yees duab tshuaj, rayons)
• • Kub exchangers
• • Exhaust manifolds
• • Rauv qhov chaw
• • Kub exchangers
• • Jet engine qhov chaw
• • Valve thiab twj tso kua mis
• • Pulp, ntawv, thiab textile ua khoom siv
• • Kev tsim vaj tse, qhov rooj, qhov rais thiab armatures
• • Offshore modules
• • Cov kav dej thiab cov kav dej rau cov khoom siv tshuaj lom neeg
• • Kev thauj mus los ntawm cov tshuaj
• • Khoom noj khoom haus thiab dej haus
• • Cov khoom siv tshuaj
• • Synthetic fiber, ntawv thiab textile nroj tsuag
• • Lub nkoj siab

• Cov khoom ntawm 316L

  316L stainless hlau tau yooj yim txheeb xyuas los ntawm kev tshuaj xyuas nws cov ntsiab lus carbon - uas yuav tsum qis dua li ntawm 316. Tsis tas li ntawd, ntawm no yog qee cov khoom 316L uas tseem paub qhov txawv ntawm lwm qib steel.

  Lub cev muaj zog

  316L muaj qhov ceev ntawm 8000 kg / m3 thiab elastic modulus ntawm 193 GPa.Ntawm qhov kub ntawm 100 ° C, nws muaj thermal txuas ntawm 16.3 W / mK thiab 21.5 W / mK ntawm 500 ° C.Lub 316L kuj muaj qhov hluav taws xob tiv thaiv ntawm 740 nΩ, nrog rau qhov muaj peev xwm kub ntawm 500 J / kg.K.

  Tshuaj muaj pes tsawg leeg

  316l SS muaj pes tsawg leeg nta cov pa roj carbon ntau ntawm 0.030%.Cov qib silicon ncov ntawm qhov siab tshaj plaws ntawm 0.750%.Qhov siab tshaj plaws manganese, phosphorus, nitrogen, thiab sulfur qib yog teem rau ntawm 2.00%, 0.045%, 0.100% thiab 0.030%, feem.316L yog tsim los ntawm chromium ntawm 16% min thiab 18% max.Cov qib nickel raug teeb tsa ntawm 10% min thiab 14% max.Cov ntsiab lus molybdenum yog qhov tsawg kawg nkaus ntawm 2.00% thiab max ntawm 3.00%.

  Mechanical Properties

  316L tuav lub zog tensile yam tsawg kawg nkaus ntawm 485 thiab lub zog tsawg kawg nkaus ntawm 120 ntawm 0.2% pov thawj ntawm kev ntxhov siab.Nws muaj qhov elongation ntawm 40% hauv 50mm / min thiab siab tshaj plaws hardness ntawm 95kg raws li Hardness Rockwell B test.316L stainless hlau ncav cuag qhov siab tshaj plaws hardness ntawm 217kg raws li Brinell scale test.

  Corrosion Resistance

  Qib 316L muab kev tiv thaiv zoo corrosion nyob rau hauv ntau yam corrosive media thiab atmospheric ib puag ncig.Nws tuav tau zoo thaum raug crevice thiab pitting corrosion nyob rau hauv sov chloride xwm txheej.Tsis tas li ntawd, nws ua pov thawj kom nyob twj ywm txawm tias nyob rau hauv kev nyuaj siab corrosion cracking xeem ntawm siab tshaj 60 ° C.316L nthuav tawm cov dej tsis kam mus txog 1000mg / L chloride ntau ntau.

  316 qib stainless hlau yog tshwj xeeb tshaj yog zoo nyob rau hauv acidic ib puag ncig - tshwj xeeb tshaj yog thaum tiv thaiv corrosion los ntawm sulfuric, hydrochloric, acetic, formic, thiab tartaric acids, nrog rau cov kua qaub sulfates thiab alkaline chlorides.