Kev sib piv ntawm 316 thiab 316H: Standard Molybdenum-Containing vs High-Carbon High-Temperature Molybdenum-Containing Austenitic Stainless Steel

316 thiab 316H yog 316 series austenitic stainless hlau, nrog rau qhov sib txawv ntawm cov ntsiab lus carbon (316: C Tsawg dua lossis sib npaug rau 0.08%, 316H: C=0.04-0.10%). Kev tswj hwm cov pa roj carbon ntau ntawm 316H txhim kho siab - qhov kub thiab txias ntawm cov qauv kev ruaj ntseg, thaum tuav cov molybdenum- muaj corrosion kuj ntawm 316 series, ua rau lawv haum rau qhov sib txawv siab - qhov kub thiab txias kev pab cuam.

Core Parameter Sib piv

Parameter	316 Stainless hlau	316H Stainless hlau
Chemical Composition (wt%)	C Less tshaj los yog sib npaug rau 0.08, Si Less tshaj los yog sib npaug rau 1.00, Mn Less tshaj los yog sib npaug rau 2.00, P Less tshaj los yog sib npaug rau 0.045, S Less tshaj los yog sib npaug rau 0.030, Cr=16.00-18.00, Ni=10.00-14.00, Mo=2.00-3.00, Fe=	C=0.04-0.10, Si Less tshaj los yog sib npaug 1.00, Mn Less tshaj los yog sib npaug rau 2.00, P Less tshaj los yog sib npaug rau 0.045, S Less tshaj los yog sib npaug rau 0.030, Cr=16.00-18.00, Ni=10.00-14.00, Mo=2.00-3.00, Fe=Balance
Mechanical Properties (Annealed)	Tensile Strength Ntau dua los yog sib npaug rau 515MPa, Yield Strength Ntau dua lossis sib npaug rau 205MPa, Elongation Ntau dua lossis sib npaug li 40%, Hardness Tsawg dua lossis sib npaug rau 217HB	Tensile Strength Ntau dua los yog sib npaug rau 515MPa, Yield Strength Ntau dua lossis sib npaug rau 205MPa, Elongation Ntau dua lossis sib npaug li 40%, Hardness Tsawg dua lossis sib npaug rau 217HB
Siab -Tub kub Creep Strength (700 degree)	Creep rupture zog (1000h) Ntau tshaj los yog sib npaug rau 60MPa	Creep rupture zog (1000h) Ntau tshaj los yog sib npaug rau 80MPa
Kev Pabcuam Kub	-196℃txog 870℃(kev pabcuam txuas ntxiv)	-196℃txog 870℃(kev pabcuam txuas ntxiv, nyiam rau 600-870℃kev ntxhov siab-kev coj tus kheej)
Qib sib npaug	SUS316 (JIS), EN 1.4401, UNS S31600	SUS316H (JIS), EN 1.4405, UNS S31609

Qhov tseem ceeb ntawm kev ua tau zoo sib txawv: 1. High-kub kev ua haujlwm: 316H cov pa roj carbon monoxide tswj cov ntaub ntawv ruaj khov carbides ntawm qhov kub thiab txias, txhim kho creep kuj; nws 1000h creep rupture lub zog ntawm 700℃yog 33% siab dua 316. 2. Intergranular corrosion kuj: 316H yog ntau prone rau intergranular corrosion tom qab vuam tshaj 316, yuav tsum tau nruj ncej-weld annealing. 3. Weldability: 316H, muaj zoo dua welding thaum tshav kub kub 316H. coarsening cuam tshuam siab -kev ua haujlwm kub. 4. Corrosion resistance: Ob leeg muaj cov molybdenum zoo sib xws- muaj corrosion kuj, haum rau nruab nrab chloride corrosion ib puag ncig. 5. Tus nqi: 316H yog 8-12% kim dua 316.

Siv tau Scenario Distinction: 316 yog haum rau nruab nrab -kub (tsawg dua lossis sib npaug li 600 degree) corrosion- cov khoom tiv thaiv, xws li cov kav dej tshuaj, cov khoom siv ua zaub mov, cov khoom siv hauv hiav txwv thiab cov khoom siv hluav taws xob sab hauv tsev . 316H yog haum rau siab - qhov kub thiab txias -} tiv taus corrosion{- Cheebtsam, xws li siab -kub tshuaj tshuaj tiv thaiv hlab ntsha flanges, boiler superheater hlab (600{10}}870 degree), roj turbine roj system Cheebtsam thiab high-temperature corrosive chav pipelines.

Tswv yim Q&A

Q1: Dab tsi yog qhov zoo ntawm 316H tshaj 304H nyob rau hauv siab -kub corrosion ib puag ncig? A1: 316H muaj molybdenum, uas muaj qhov zoo corrosion kuj nyob rau hauv siab -kub chloride los yog qaug zog acid atmospheres tshaj 304H; nws tsim nyog rau siab -kub corrosion ib puag ncig xws li tshuaj boiler superheaters, thaum 304H tsuas yog haum rau siab -kub oxidizing ib puag ncig.

Q2: Dab tsi yog qhov ncej -weld kho cua sov qauv rau 316H? A2: Yuav tsum ua tom qab-weld annealing ntawm 850-900 degree, tuav lub sij hawm ntau dua lossis sib npaug li 30 feeb, cua txias; Cov txheej txheem no tshem tawm cov kev ntxhov siab uas seem, rov ua kom muaj kev kub ntxhov siab, thiab tsis txhob cuam tshuam kev cuam tshuam ntawm intergranular.

Q3: Puas tuaj yeem 316 hloov 316H hauv siab - qhov kub thiab txias qhov xwm txheej? A3: Tsis yog. Ntawm qhov kub siab tshaj 600 degree, 316's creep resistance yog tsis txaus, thiab nws yuav undergo yas deformation tom qab ntev - kev pab cuam lub sij hawm; 316H yog cov khoom siv zoo tshaj plaws rau siab - qhov kub thiab txias - cov khoom hauv nruab nrab corrosion.

Q4: Dab tsi yog qhov tseem ceeb ntawm kev tswj cov ntsiab lus carbon rau 316H? A4: Qhov qis qis ntawm cov ntsiab lus carbon (0.04%) ua kom cov carbides txaus rau siab -kub creep tsis kam, thiab kev txwv siab tshaj (0.10%) zam cov pa roj carbon ntau ua rau txo qis corrosion; nws sib npaug siab -kub kev ua haujlwm thiab corrosion kuj.

Q5: Yuav ua li cas xaiv ntawm 316 thiab 316H? A5: Xaiv 316 yog tias qhov kev pabcuam kub tsawg dua lossis sib npaug li 600℃thiab tsis ntev -lub sijhawm siab- qhov kub thiab txias yog siv; xaiv 316H yog tias qhov kev pabcuam kub yog 600-870 degree, cov khoom tivthaiv muaj kev ntxhov siab, thiab nruab nrab corrosion kuj yuav tsum tau.