A351 CF8M vs 316 SS
Apr 15, 2026
Tso lus
Dab tsi yog qhov txawv ntawm CF8M thiab SS 316?
CF8M tau txhais hauv ASTM A351, ASTM A743 thiab ASTM A744, uas yog rau lub hom phiaj casting nkaus xwb. SS316 yog txhais nyob rau hauv ASTM A240 thiab ASTM A276, nws yog rau phaj, ntawv, sawb lossis stainless hlau tuav. Lwm qib yog lub npe hu ua F316, uas yog los ntawm ASTM A182 rau Forged qhov chaw nkaus xwb.
Cov khoom siv ntawm A351 CF8M yog dab tsi?
ASTM A351 CF8M yog ib qho uas feem ntau siv austenitic stainless hlau casting alloy tsim los rau siab -muaj cov khoom. Nws yog cam khwb cia sib npaug ntawm wrought 316 stainless hlau (muaj 18-21% Chromium, 9-12% Nickel, thiab 2-3% Molybdenum), muab kev tiv thaiv corrosion zoo heev, tshwj xeeb tshaj yog tiv thaiv pitting hauv chloride-nplua nuj ib puag ncig.
SS 316 khoom yog dab tsi?
SS 316 (Stainless Steel 316) yog austenitic stainless hlau uas muaj 16-18% chromium, 10-14% npib tsib xee, thiab 2-3% molybdenum, nrog rau qhov siab tshaj ntawm 0.08% carbon. Qhov sib ntxiv ntawm molybdenum ho txhim kho nws cov corrosion kuj, tshwj xeeb tshaj yog tiv thaiv chlorides, acids, thiab marine ib puag ncig. Nws tuaj yeem ua tiav rau hauv ntau yam khoom siv, nrog rau cov phaj, coils, kav, tuav, thiab xaim. Rau cov ncauj lus kom ntxaws tshuaj muaj pes tsawg leeg thiab kuaj dawb, thov hu rau peb lub Hoobkas tam sim ntawd.
A351 CF8M sib npaug li cas?
ASTM A351 CF8M feem ntau sib npaug rau AISI 316 stainless hlau (wrought) thiab European tus qauv EN 1.4408. Nws yog austenitic cam khwb cia hlau stainless, feem ntau hu ua molybdenum- bearing stainless hlau vim nws 2-3% Mo cov ntsiab lus, uas muab superior corrosion kuj nyob rau hauv chloride ib puag ncig piv rau CF8 (304).
A351 CF8M vs 316 sS: Classification & Standards
| Feature | ASTM A351 CF8M Txheem: | AISI 316 Stainless hlau |
| Daim ntawv khoom | Castings (Valves, Pump lub cev, Fittings) | Wrought (Seamless / Welded Pipes, Ntawv, Bars) |
| Microstructure | Austenitic + Ferrite (3% - 12%) | Siab Austenitic |
| Cov Standards | ASTM A351, A743, A744 |
ASTM A312 (Pib), A240 (Plate), A182 (Forging)
|
Txoj kev tsim khoom:CF8M yog tsim los siv cov txheej txheem casting (ASTM A351), thiab feem ntau muaj ntau dua chromium thiab npib tsib xee cov ntsiab lus kom ntseeg tau qhov sib npaug corrosion kuj nyob rau hauv raws li - nrum microstructure vim elemental partitioning ntawm austenite thiab ferrite theem. 316 stainless hlau yog tsim los siv cov txheej txheem forging (ASTM A240).
A351 CF8M vs 316 sS: Chemical Composition Comparison (%)
| Element | CF8M (ntaub ntawv) | AISI 316 (Tshooj) |
| Cov pa roj carbon (C) | 0.08 max | 0.08 max |
| Manganese (Mn) | 1.50 max | max 2.00 Nws |
| Silicon (Si) | 1.50 max (rau kev pab castability) | 0.75-1.00 Nws |
| Chromium (Cr) | 18.0 – 21.0 | 16.0 – 18.0 |
| Nickel (Ni) | 9.0 – 12.0 | 10.0 – 14.0 |
| Molybdenum (hli) | 2.0 – 3.0 | 2.0 – 3.0 |
A351 CF8M vs 316 ss: Mechanical Properties
| Khoom | A351 CF8M (Ntaus) | AISI 316 (Wrought / Annealed) |
| Tensile zog (MPa) | Ntau dua lossis sib npaug rau 485 (70 ksi) | Ntau dua lossis sib npaug rau 515 (75 ksi) |
| Ntau dua lossis sib npaug rau 205 (30 ksi) | Ntau dua lossis sib npaug rau 205 (30 ksi) | |
| Elongation (%) | Ntau dua lossis sib npaug li 30% | Ntau dua lossis sib npaug li 40% |
| Hardness (HBW) | ~170 | ~160 |
Puas yog A351 CF8M thiab 316 sS sib nqus?
A351 CF8M (cam khwb cia) feem ntau yog sib nqus me ntsis vim yog cov ntsiab lus ferrite rau weldability, thaum wrought 316 stainless hlau feem ntau tsis yog-sib nqus. Ob leeg yog austenitic, tab sis CF8M tuaj yeem muaj 3%-12% sib nqus ferrite, ua rau nws pom cov hlau nplaum tsis muaj zog, thaum 316 feem ntau tseem tsis yog- sib nqus tshwj tsis yog txias - ua haujlwm.
Puas yog CF8M zoo ib yam li 304?
Tsis yog, CF8M tsis zoo ib yam li 304 stainless hlau. Thaum ob leeg yog austenitic stainless hlau siv hauv castings (valve, twj), CF8M yog qhov sib npaug ntawm 316 stainless hlau, thaum CF8 yog qhov sib npaug ntawm 304. CF8M muaj molybdenum rau ntau dua corrosion, tsis zoo li 304/CF8.
ASTM A351 CF8M Chaw tsim tshuaj paus
GNEE xyuas kom meej tias yog tias koj yuav 316 stainless hlau kav los ntawm peb, qhov sib txuam CF8M li qub yuav raug tshuaj lom neeg nrog rau koj qhov tshwj xeeb corrosive ib puag ncig.
Rau CF8M castings, peb tuaj yeem muab cov ntsiab lus ferrite kuaj kom ntseeg tau tias cov ntsiab lus ferrite nyob rau hauv thaj tsam ntawm 3% -12%, yog li ua tiav qhov zoo tshaj plaws weldability. Ob qho khoom cam khwb cia thiab forged yog tag nrho EN 10204 3.1 ntawv pov thawj los xyuas kom meej qhov project traceability.
Pipes/Tubes: Seamless kav, welded kav (ERW/EFW), specifications npog SCH 5S rau SCH XXS.
Lwm tus: 316 stainless hlau nruab nrab thiab hnyav daim hlau, txias- cov ntawv dov, puag ncig tuav, tiaj tiaj.
ASTM A351 CF8M (Casting Products) Cov Khoom Siv Hluav Taws Xob: Cast steel pob li qub, rooj vag li qub, lub ntiaj teb li qub, kos li qub, thiab npauj npaim li qub.
Lus Cim: Yog tias koj lub kav dej muaj feem cuam tshuam nrog kev sib txuas, nws raug nquahu kom xaiv 316L (Low Carbon) cov kav dej nrog CF8M li qub kom txo qis carbide nag lossis daus hauv qhov vuam kub - thaj tsam cuam tshuam. Hauv kev lag luam hauv hiav txwv lossis qib siab -chloride ib puag ncig, xyuas kom meej tias Mo cov ntsiab lus ntawm CF8M siab dua 2.0% (GNEE cov qauv feem ntau tswj nws siab tshaj 2.1%) kom ntseeg tau tias pitting corrosion kuj.
Yog tias koj tab tom tsim cov khoom tshwj xeeb lossis tshuaj xyuas daim nqi ntawm cov ntaub ntawv, thov qhia rau kuv paub:
Puas yog cov khoom siv valve, lub twj tso kua mis, lossis cov kav dej sib dhos?
Koj puas yuav tsum tau txiav txim siab weldability lossis corrosion kuj txwv rau cov kua dej tshwj xeeb?
Xa kev nug