Stainless hlau SS304: Ib qho chromium-nickel austenitic stainless hlau nrog txog 0.08% carbon, muab lub zog ntau dua rau kev siv cov qauv xws li cov hlab ntsha siab thiab cov vaj huam sib luag.
Stainless hlau 304L: Tsawg- carbon variant ntawm 304 nrog Tsawg dua los yog sib npaug rau 0.03% carbon, tsim los rau superior weldability los ntawm kev txo cov kev pheej hmoo ntawm rhiab heev (chromium carbide nag lossis daus), zoo tagnrho rau welded daim ntaub ntawv xws li tshuaj tso tsheb hlau luam thiab khoom noj khoom haus ua khoom noj.
Kev sib piv tshuaj lom neeg
|
Lub ntsiab |
SS304 (%) |
304L (%) |
|---|---|---|
|
Cov pa roj carbon (C) |
0.00 - 0.08 |
0.00 - 0.03 |
|
Manganese (Mn) |
0.00 - 2.00 |
0.00 - 2.00 |
|
Silicon (Si) |
0.00 - 0.75 |
0.00 - 0.75 |
|
Phosphorus (P) |
0.00 - 0.045 |
0.00 - 0.045 |
|
Sulfur (S) |
0.00 - 0.030 |
0.00 - 0.030 |
|
Chromium (Cr) |
18.00 - 20.00 |
18.00 - 20.00 |
|
Nickel (Ni) |
8.00 - 10.50 |
8.00 - 12.00 |
|
Nitrogen (N) |
0.00 - 0.10 |
0.00 - 0.10 |
|
Hlau (Fe) |
Tshuav |
Tshuav |
Mechanical Properties Sib piv
|
Khoom |
SS304 (Min) |
304L (Min) |
Sau ntawv |
|---|---|---|---|
|
Tensile zog (MPa) |
515 |
485 |
304 muaj zog dua vim muaj cov pa roj carbon ntau dua |
|
Tawm Zog (0.2% Offset, MPa) |
205 |
170 |
304L txi lub zog rau weldability |
|
Elongation (A5, 50 hli) |
40% |
40% |
Ob leeg heev formable |
|
Hardness (Brinell) |
Tsawg dua lossis sib npaug rau 201 HB |
Tsawg dua lossis sib npaug rau 201 HB |
Zoo sib xws machinability |
|
Hardness (Rockwell B) |
Tsawg dua lossis sib npaug rau 92 HRB |
Tsawg dua lossis sib npaug rau 92 HRB |
Zoo sib xws machinability |
Kev sib piv Corrosion Resistance
Ob leeg stainless hlau SS304 thiab 304L muab kev tiv thaiv corrosion zoo hauv:
Atmospheric tej yam kev mob, dej tshiab, thiab me me acids (zaub mov-qib daim ntawv thov).
Ib puag ncig dav dav, ua tau zoo tshaj SS204 vs SS 304 vim muaj cov ntsiab lus ntau dua nickel.
Qhov txawv tseem ceeb:
304L: Superior nyob rau hauv welded daim ntaub ntawv, raws li nws cov ntsiab lus carbon tsawg tiv thaiv rhiab heev, tswj corrosion kuj nyob rau hauv weld aav, tshwj xeeb tshaj yog nyob rau hauv corrosive ib puag ncig zoo li tshuaj ua.
SS304: me ntsis yooj yim rau rhiab heev thaum vuam, yuav tsum tau tswj cov cua sov nkag los yog tom qab-weld annealing kom muaj corrosion kuj.
Ob leeg tsis tshua muaj chloride-induced pitting piv rau 316L, uas muaj molybdenum. Rau chloride- hnyav ib puag ncig, tshawb 316L.
Kev sib piv Weldability
SS304: Zoo weldability nrog ER308 lossis ER308L muab tub lim, tab sis cov pa roj carbon ntau dua (tsawg dua lossis sib npaug li 0.08%) ua rau muaj kev pheej hmoo ntawm rhiab heev (chromium carbide nag lossis daus) hauv thaj chaw welded, muaj peev xwm txo qis corrosion tshwj tsis yog annealed.
304L: Weldability zoo heev vim muaj cov pa roj carbon tsawg (tsawg dua lossis sib npaug li 0.03%), txo qhov kev xav tau thiab feem ntau tshem tawm qhov xav tau rau kev tshaj tawm -weld annealing. Zoo dua rau cov ntawv thov welded xws li SA 240 GR 304 yeeb nkab lossis tshuaj tso tsheb hlau luam.
Daim ntawv thov
Stainless hlau SS304: Nyiam rau cov uas tsis yog -welded structural daim ntaub ntawv (xws li, plat SS 304 3mm, architectural panels, siab hlab ntsha) qhov xav tau ntau zog. Competitive SS 304 phaj nqi rau kev siv dav dav.
Stainless hlau 304L: Zoo tagnrho rau welded daim ntaub ntawv (xws li, khoom noj khoom haus tso tsheb hlau luam, 304L yeeb nkab, chemical khoom) vim superior weldability thiab corrosion kuj post- vuam.
