304 vs 304L Stainless Steel: Liphapang le Likopo

2025-04-16

Likarolo tsa 304 le 304L litšepe tse se nang tšepe li maemong a har'a li-alloys tse tsebahalang haholo tsa austenitic, tse ratoang ka lebaka la ho hanyetsa kutu le ho ikamahanya le maemo. Ho khetha e nepahetseng ho bolela ho utloisisa phapang e poteletseng—empa e le ea bohlokoa—k’khemistri le tšebetsong. Tataiso ena e latela sebopeho se tloahelehileng - sebopeho, thepa, ho cheseha, lisebelisoa le litšenyehelo - ha e ntse e fana ka pono e ncha ho u thusa ho etsa khetho e nepahetseng. 304 vs 304L

Motsoako oa Lik'hemik'hale oa 304 le 304L Litšepe Tse Hloekileng

304 Tšepe e Hloekileng
- Khabone (C): ho fihla ho 0.08%
- Chromium (Cr): 18–20%
- Nickel (Ni): 8–10.5%
304L tšepe e se nang mochini
- Khabone (C): ho fihla ho 0.03%
- Chromium (Cr): 18–20%
- Nickel (Ni): 8–12%

Phapang e ikhethang ke khabone. Ka khabone ea eona e theoletsoeng, 304L e hanana le ho thehoa ha chromium carbides meeling ea lijo-thollo nakong ea welding, e boloka khanyetso ea eona ho kutu ea intergranular. (Ak'u nahane ka 304 e le sehahi sa 'mele - se phahamisa khabone - ha 304L e le morupeli oa yoga, e bonolo ebile e tenyetseha sebakeng se anngoeng ke mocheso.)

Papiso ea Thepa ea 'Mele le Mechini

Thepa	304	304L	Se Bolelang?
Tensile Strength (MPa)	~ 520–750	~ 485–690	304 e hula ka thata hanyane, empa ka bobeli e feta litlhoko tse ngata
Yield Strength (MPa)	~205–215	~ 170–200	Moeli o fokolang ho isa ho 304 bakeng sa lits'ebetso tse tsamaisang thepa
Elongation (%)	≥40	≥40	E babatsehang ho otlolla ka bobeli bakeng sa ho theha e rarahaneng
Ho thatafala (Brinell)	~ 70–90	~ 65–85	E batla e ts'oana ka ts'ebeliso e tloaelehileng
Khanyetso ea Corrosion	E ntle haholo (ditikoloho tse akaretsang)	E phahame ka likarolo tse cheselitsoeng	304L e benya ka mor'a weld ntle le kalafo e eketsehileng ea mocheso

Weldability le Thepa

Weldability
Li-alloys ka bobeli li chesoa habonolo ka mekhoa e tloaelehileng. Leha ho le joalo, litlolo tsa 304L tsa khabone e tlase li bolela hore hangata u ka tlola li-annealing tsa post-weld-ho boloka nako le matla.

Boikemisetso
Litšepe tsa Austenitic li atisa ho sebetsa ka thata. Ho loantša ho qoqa le ho roala lithulusi pele ho nako, sebelisa lithapo tse hlabang, lijo tse itekanetseng, le lubrication e lekaneng. 304L e bonolo hanyenyane e ka fana ka qetello e bonolo tlas'a maemo a tšoanang.

Lisebelisoa tsa 304 le 304L Stainless Steels

304 Tšepe e Hloekileng

Lisinki tsa kichine tsa khoebo, lijana tsa ho pheha, le lisebelisoa tsa ho sebetsana le lijo
Likarolo tsa meaho ea mekhabiso (mohlala, litšepe, likoahelo)
Likepe tsa polokelo le litanka tsa khatello ea mocheso o itekanetseng

304L tšepe e se nang mochini

Ts'ebetso ea lik'hemik'hale le liphaephe tsa petrochemical (li-weld seams tse ngata)
Lisebelisoa tsa mocheso le li-condensers (critical weld integrity)
Litanka tsa indasteri ea meriana le ea lebese (lintlafatso tsa weld khafetsa)

Litšenyehelo le ho ba Teng

Litšenyehelo
Lebella hore 304L e tla nka chelete e nyane haholo - hangata e phahame ka 3-7% - e bonts'a melemo ea eona ea khabone e tlase likopanong tse cheselitsoeng. Ka litaelo tse kholo, phapang eo e ka eketsa, kahoo e kenye ka tekanyetso ea hau.

Ho fumaneha
Limaraka tseo ka bobeli ke lintho tse ka sehloohong tsa ketane ea phepelo ea tšepe: lishiti, lipoleiti, mekoallo, li-tubing, le tse ling ka mefuta e mengata e fapaneng. Linako tse tloaelehileng tsa ho etella pele li khuts'oane, empa bakeng sa liforomo tse khethehileng kapa likarolo tse teteaneng, rera esale pele.

Qetello

Lihlopha tsa 304 le 304L li arolelana mokokotlo o tloaelehileng oa ho hanyetsa ho bola le ho ba le sebopeho. Qeto ea hau e ipapisitse le litlhoko tsa tjheseletsa le maemo a ts'ebeletso: khetha 304L ha u fokotsa kalafo ea mocheso ka mor'a tjheseletsa le ho phahamisa khanyetso ea corrosion ea weld-zone ke lintho tse tlang pele; khetha 304 haeba o hloka matla a eketsehileng bakeng sa likarolo tse akaretsang. Ka theknoloji e ntseng e tsoela pele ea ho ikopanya le li-drive tsa ts'ebetso, li-alloys ka bobeli li tla lula li le liindasteri ho pholletsa le lilemo tse tlang.