Alloy	%	Ni	Cr	Mo	Cu	N	C	Mn	Si	P	S
254SMO	Min.	17.5	19.5	6	0.5	0.18
Oke.	18.5	20.5	6.5	1	0.22	0.02	1	0.8	0.03	0.01

Njirimara anụ ahụ 254SMO:

Njupụta	8.0 g/cm3
Ebe mgbaze	1320-1390 ℃

254SMO kacha nta n'ibu akụrụngwa n'ime ụlọ okpomọkụ:

Ọnọdụ	Ike ọdụdọ Rm N RM N/mm2	Mpụta ike RP0.2N/mm2	Ogologo oge A5%
254 SMO	650	300	35

 

Njirimara:
Nnukwu ịta nke molybdenum, chromium na nitrogen mere 254SMO nwere ezigbo nguzogide pitting na arụrụ arụrụ arụ. Ọla kọpa kwalitere nguzogide corrosion na ụfọdụ acid . Na mgbakwunye, n'ihi nnukwu ọdịnaya nke nickel, chromium na molybdenum, nke mere na 254SMO nwere ezigbo nrụgide corrosion cracking arụmọrụ.
1.A otutu nke a dịgasị iche iche ojiji nke ahụmahụ egosila na ọbụna iin elu okpomọkụ, 254SMO na oké osimiri mmiri na-ukwuu eguzogide corrosion arụmọrụ ọdịiche, nanị ole na ole ụdị igwe anaghị agba nchara na nke a arụmọrụ.
2.254SMO dị ka akwụkwọ ịcha ọcha chọrọ maka mmepụta nke ngwọta acidic na ngwọta halide oxidative corrosion resistance na corrosion resistance nwere ike iji ya tụnyere ihe kachasị na-edozi na isi ihe nke nickel na titanium alloy.
3.254SMO n'ihi nnukwu ọdịnaya nitrogen, ya mere ike ọrụ ya karịa ụdị ndị ọzọ nke austenitic igwe anaghị agba nchara dị elu. Na mgbakwunye, 254SMO nwekwara ike ịgbatị ma na-emetụta ike yana ezigbo weldability.
4.254SMO na elu molybdenum ọdịnaya nwere ike ime ka ọ dị elu ọnụego nke oxidation na annealing , nke mgbe acid ihicha na ike ike elu karịa nkịtị igwe anaghị agba nchara bụ ihe nkịtị karịa ike ike elu. Otú ọ dị, emetụtaghị n'ụzọ dị njọ maka nguzogide corrosion nke ígwè a.

 

Ọdịdị metallurgical
254SMO bụ usoro lattice cubic dabere na ihu. Iji nweta austenitic Ọdịdị, 254SMO n'ozuzu annealing na 1150-1200 ℃. N'ọnọdụ ụfọdụ, ihe ma eleghị anya na metụtara nke metal n'etiti frasi (χ frasi na α-phase). Agbanyeghị, ike mmetụta ha na nguzogide corrosion anaghị emetụta ya n'ọnọdụ nkịtị. Mgbe etinyere ya na nso nke 600-1000 ℃, ha nwere ike wepụta oge na oke mmiri ozuzo.

 

Nguzogide corrosion
254SMO nwere obere carbon dị ala, nke pụtara na ihe egwu dị na kpo oku sitere na mmiri ozuzo carbide dị obere. Ọbụna na 600-1000 ℃ mgbe otu awa sensitization ka na-enwe ike Strauss site intergranular corrosion ule (Strauss Test ASTMA262 iji E) . Otú ọ dị, n'ihi na nke elu-alloy ígwè ọdịnaya. Na n'elu-e kwuru n'elu okpomọkụ nso intermetallic oge na ekwe omume nke metal na ọka oke ọdịda. Ndị a sediments adịghị eme ka ọ na-eme intergranular corrosion na corrosive media ngwa, mgbe ahụ, ịgbado ọkụ nwere ike rụrụ na-enweghị intergranular corrosion. Ma na okpomọkụ nke concentrated nitric acid, ndị a sediments nwere ike ime ka intergranular corrosion na okpomọkụ-emetụta mpaghara. Ọ bụrụ na igwe anaghị agba nchara nkịtị na ngwọta nke nwere chloride, bromide ma ọ bụ iodide, ọ ga-egosi pitting, crevice corrosion ma ọ bụ nrụgide corrosion cracking form site na mpaghara corrosion. Agbanyeghị, n'ọnọdụ ụfọdụ, ịdị adị nke halide ga-eme ka corrosion otu ahụ dị ngwa. Karịsịa na acid na-abụghị oxidizing. Na sulfuric acid dị ọcha, 254SMO nwere nguzogide corrosion dị ukwuu karịa 316 (igwe anaghị agba nchara), mana ya na nguzogide corrosion na-ebelata ma e jiri ya tụnyere 904L (NO8904) igwe anaghị agba nchara na nnukwu mkpokọta. Na sulfuric acid nwere chloride ion , 254SMO na kasị ukwuu corrosion eguzogide ikike.The 316 enweghị ike iji igwe anaghị agba nchara na hydrochloric acid ebe ọ nwere ike ime localized corrosion na edo corrosion, ma 254SMO nwere ike ji mee ihe na diluted hydrochloric acid n'ozuzu okpomọkụ. ,Uder ókè mpaghara adịghị mkpa ichegbu onwe maka corrosion mere. Otú ọ dị, anyị aghaghị ịgbalị izere mgbawa oghere ahụ. Na fluoride silicate (H2SiF4) na hydrofluoric acid (HF), corrosion eguzogide nke nkịtị igwe anaghị agba nchara bụ nnọọ mmachi, na 254SMO nwere ike ji mee ihe na a nnọọ mbara okpomọkụ na ịta.

 

Agba etinyere:
254SMO bụ ihe nwere ọtụtụ ebumnuche enwere ike iji n'ọtụtụ ngwa ụlọ ọrụ:
1. Petroleum, petrochemical equipment, petro-chemical equipment, dị ka mgbịrịgba.
2. Pulp na akụrụngwa ịcha ọcha akwụkwọ, dị ka isi nri pulp, ịcha ọcha, ihe nzacha a na-eji na gbọmgbọm na igwe mkpuchi cylinder, na ihe ndị ọzọ.
3. Ike osisi flue gas desulphurization akụrụngwa, ojiji nke isi akụkụ: na absorption ụlọ elu, flue na nkwụsị efere, esịtidem akụkụ, ịgbasa usoro.
4. N'elu mmiri ma ọ bụ usoro nhazi mmiri mmiri, dị ka ụlọ ọrụ ọkụ na-eji mmiri mmiri na-eme ka mmiri dị nro dị nro, nke na-eme ka mmiri na-edozi mmiri na-edozi mmiri, nwere ike itinye ya n'agbanyeghị na mmiri nwere ike ọ gaghị eruba na ngwaọrụ ahụ.
5. Ụlọ ọrụ na-eme ka mmiri na-ekpo ọkụ, dị ka nnu ma ọ bụ ihe eji eme ihe.
6. Onye na-ekpo ọkụ ọkụ, karịsịa na ebe ọrụ nke ion chloride.