Kev sib piv ntawm 316 thiab 316L Stainless Hlau: Standard Austenitic vs Tsawg-Carbon Austenitic Qib

316 thiab 316L yog cov qhab nia tseem ceeb hauv 316 series, nrog rau cov tub ntxhais sib txawv yog cov ntsiab lus carbon (316: C Tsawg dua lossis sib npaug li 0.08%, 316L: C Tsawg dua lossis sib npaug li 0.03%). Cov ntsiab lus qis ntawm 316L zam kev cuam tshuam ntawm intergranular tom qab vuam, ua rau lawv tsim nyog rau cov txheej txheem vuam sib txawv thiab cov cheeb tsam corrosion.

Core Parameter Sib piv

Parameter	316 Stainless hlau	316L 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 Less tshaj los yog sib npaug rau 0.03, 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=
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 485MPa, Yield Strength Ntau dua lossis sib npaug rau 170MPa, Elongation Ntau dua lossis sib npaug li 40%, Hardness Tsawg dua lossis sib npaug rau 217HB
Kev Pabcuam Kub	-196℃txog 870℃(kev pabcuam txuas ntxiv)	-196℃txog 870℃(kev pabcuam txuas ntxiv)
Qib sib npaug	SUS316 (JIS), EN 1.4401, UNS S31600	SUS316L (JIS), EN 1.4404, UNS S31603

Qhov tseem ceeb ntawm kev ua tau zoo sib txawv: 1. Intergranular corrosion kuj: 316L cov ntsiab lus qis carbon tsis txhob nag lossis daus ntawm Cr23C6 carbides ntawm grain ciam teb tom qab vuam, tshem tawm intergranular corrosion; 316 yog feem ntau cuam tshuam rau intergranular corrosion tom qab vuam yog tias tsis muaj ncej-weld annealing yog ua. 2. Lub zog: 316 muaj zog tensile zog me ntsis (Ntau dua los yog sib npaug rau 515MPa) thiab tawm lub zog (Ntau dua lossis sib npaug ntawm 205MPa) ntau dua 316L rau 48MPa (siab tshaj los yog sib npaug 170MPa). 3. Weldability: 316L muaj kev ruaj ntseg vuam zoo dua, tsis muaj kev tshaj tawm- vuam cua sov yuav tsum tau siv rau feem ntau cov xwm txheej; 316 yuav tsum tau ncej-weld annealing ntawm 850-900℃rau tuab daim hlau los yog hnyav corrosion puag ncig. 4. Tus nqi: 316L yog 5-10% kim dua 316. 5. Formability: Ob leeg muaj qhov txias txias / kub formability, tsis muaj qhov txawv txav.

Siv tau Scenario Distinction: 316 yog haum rau tsis yog - vuam los yog ncej- vuam cua sov- cov khoom kho tau, xws li forged valve lub cev, tsis yog- vuam kav dej, thiab siab - qhov kub ntawm cov khoom siv hluav taws xob. 316L yog haum rau vuam- cov khoom hnyav thiab hnyav corrosion ib puag ncig, xws li tshuaj lom neeg cov hlab ntsha (welding qauv), seawater pipelines, khoom noj khoom haus ua (welding qhov chaw), thiab cov khoom siv tshuaj.

Tswv yim Q&A

Q1: Vim li cas 316L yog cov khoom siv zoo tshaj plaws rau vuam -cov khoom siv tiv thaiv corrosion- cov khoom tiv thaiv? A1: Nws cov ntsiab lus carbon tsawg (tsawg dua lossis sib npaug li 0.03%) tiv thaiv kev tsim ntawm chromium-depleted aav ntawm cov ciam teb thaum lub sij hawm vuam, tsis txhob cuam tshuam kev sib tsoo; nws muaj peev xwm tuav tau zoo corrosion tsis muaj post-weld kho cua sov, txo cov nqi ua.

Q2: Puas tuaj yeem 316 hloov 316L hauv txhua qhov xwm txheej? A2: Tsis yog. Nyob rau hauv vuam- hnyav lossis hnyav corrosion ib puag ncig (xws li chloride-muaj, acidic), 316 yog qhov cuam tshuam rau intergranular corrosion; 316 tsuas tuaj yeem hloov 316L hauv qhov tsis yog{10}} vuam xwm txheej lossis thaum tshaj tawm - vuam annealing yog ua tau.

Q3: Qhov txawv ntawm kev kho cua sov ntawm 316 thiab 316L yog dab tsi? A3: Ob leeg siv cov tshuaj kho mob ntawm 1050-1150 degree, dej txias; 316 yuav tsum tau ncej-weld annealing ntawm 850-900℃rau cov phaj tuab (Ntau dua lossis sib npaug li 10mm) los kho corrosion kuj; 316L feem ntau tsis xav tau kev kho cua sov tom qab vuam.

Q4: Dab tsi yog qhov kev pab cuam lub neej sib txawv ntawm 316 thiab 316L hauv thaj chaw ntug dej hiav txwv? A4: 316L lub neej ua haujlwm (8-10 xyoo) yog ntev tshaj 316 (5-7 xyoo) nyob rau hauv ntug dej hiav txwv atmospheric ib puag ncig; 316's weld cheeb tsam yog nquag xeb ua ntej, thaum 316L's weld cheeb tsam tuav zoo corrosion kuj.

Q5: Yuav ua li cas xaiv ntawm 316 thiab 316L? A5: Xaiv 316 yog tias cov khoom siv tsis yog- vuam lossis ncej- vuam cua sov- kho tau thiab tus nqi yog qhov kev txhawj xeeb; xaiv 316L yog tias cov khoom siv vuam- siv zog los yog siv rau hauv qhov hnyav corrosion.