Kev Taw Qhia
Qib 304 yog tus qauv "18/8" stainless; nws yog cov hlau stainless uas siv tau ntau yam thiab siv dav tshaj plaws, muaj ntau yam khoom, cov duab thiab cov tiav dua li lwm yam. Nws muaj cov yam ntxwv zoo heev rau kev tsim thiab vuam. Cov qauv austenitic sib npaug ntawm Qib 304 ua rau nws tuaj yeem kos tob heev yam tsis muaj kev sib xyaw nruab nrab, uas ua rau qib no tseem ceeb hauv kev tsim cov khoom siv stainless xws li dab dej, cov khoom siv khoob thiab cov lauj kaub. Rau cov ntawv thov no nws yog ib txwm siv cov kev hloov pauv tshwj xeeb "304DDQ" (Kev Kos Duab Sib Sib Zog). Qib 304 yooj yim nres lossis dov ua ntau yam khoom rau kev siv hauv kev lag luam, kev tsim vaj tsev, thiab kev thauj mus los. Qib 304 kuj muaj cov yam ntxwv zoo heev. Kev sib xyaw tom qab vuam tsis tas yuav tsum tau thaum vuam cov ntu nyias.
Qib 304L, qhov qis carbon version ntawm 304, tsis tas yuav tsum tau tom qab-weld annealing thiab yog li ntawd siv dav hauv cov khoom hnyav gauge (ntau tshaj li 6 hli). Qib 304H nrog nws cov pa roj carbon ntau dua pom kev siv ntawm qhov kub siab. Cov qauv austenitic kuj muab cov qib no zoo heev toughness, txawm tias mus txog rau qhov kub cryogenic.
Cov Khoom Tseem Ceeb
Cov khoom no tau teev tseg rau cov khoom tiaj tiaj (phaj, ntawv thiab kauj) hauv ASTM A240/A240M. Cov khoom zoo sib xws tab sis tsis tas yuav zoo ib yam tau teev tseg rau lwm cov khoom xws li yeeb nkab thiab pas nrig hauv lawv cov lus qhia.
Kev sau ua ke
Cov qauv sib xyaw ua ke rau qib 304 stainless hlau tau muab tso rau hauv rooj 1.
| Qib | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | feeb. siab tshaj plaws. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
| 304L | feeb. siab tshaj plaws. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
| 304H | feeb. siab tshaj plaws. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | |
Rooj 1.Cov khoom sib xyaw ua ke rau qib 304 stainless hlau
Cov Khoom Siv Kho Tshuab
Cov khoom siv kho tshuab ib txwm muaj rau qib 304 stainless hlau tau muab tso rau hauv rooj 2.
Rooj 2.Cov khoom siv kho tshuab ntawm 304 qib stainless hlau
| Qib | Lub zog Tensile (MPa) feeb | Lub zog tawm los 0.2% pov thawj (MPa) feeb | Kev ntev (% hauv 50 hli) feeb | Qhov nyuaj | |
| Rockwell B (HR B) siab tshaj plaws | Brinell (HB) siab tshaj plaws | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| 304H kuj muaj qhov yuav tsum tau muaj qhov loj ntawm ASTM No 7 lossis coarser. | |||||
Kev Tiv Thaiv Kev Xeb
Zoo heev nyob rau hauv ntau yam huab cua ib puag ncig thiab ntau yam corrosive media. Raug rau pitting thiab crevice corrosion nyob rau hauv sov chloride ib puag ncig, thiab rau kev ntxhov siab corrosion cracking saum toj no li 60 ° C. suav tias yog resistant rau dej haus nrog txog li 200 mg / L chlorides ntawm ambient kub, txo mus rau li 150 mg / L ntawm 60 ° C.
Kev Tiv Thaiv Kub
Kev tiv thaiv oxidation zoo hauv kev pabcuam tsis tu ncua mus rau 870 ° C thiab hauv kev pabcuam tas mus li mus rau 925 ° C. Kev siv tas mus li ntawm 304 hauv qhov ntau ntawm 425-860 ° C tsis pom zoo yog tias qhov kev tiv thaiv xeb dej tom qab ntawd tseem ceeb. Qib 304L tiv taus cov carbide nag thiab tuaj yeem ua kom sov rau hauv qhov kub siab dua.
Qib 304H muaj zog dua ntawm qhov kub siab yog li feem ntau siv rau cov qauv thiab cov ntawv thov siab ntawm qhov kub siab tshaj li 500 ° C thiab txog li 800 ° C. 304H yuav dhau los ua qhov rhiab heev hauv qhov kub ntawm 425-860 ° C; qhov no tsis yog teeb meem rau cov ntawv thov kub siab, tab sis yuav ua rau txo qis kev tiv thaiv corrosion aqueous.
Kev Kho Mob Kub
Kev Kho Mob Kua (Annealing) - Kub txog 1010-1120 ° C thiab txias sai. Cov qib no tsis tuaj yeem ua kom tawv los ntawm kev kho cua sov.
Kev vuam
Zoo heev weldability los ntawm txhua tus qauv fusion txoj kev, ob qho tib si nrog thiab tsis muaj filler hlau. AS 1554.6 pre-qualifying welding ntawm 304 nrog Qib 308 thiab 304L nrog 308L rods lossis electrodes (thiab nrog lawv cov silicon sib npaug siab). Cov seem welded hnyav hauv Qib 304 yuav xav tau post-weld annealing rau qhov siab tshaj plaws corrosion tsis kam. Qhov no tsis tas yuav tsum tau rau Qib 304L. Qib 321 kuj tseem siv tau ua lwm txoj hauv kev rau 304 yog tias xav tau qhov hnyav welding thiab tom qab-weld cua sov kho tsis tau.
Cov ntawv thov
Cov ntawv thov ib txwm muaj xws li:
Cov khoom siv ua zaub mov, tshwj xeeb tshaj yog hauv kev ua npias, kev ua mis nyuj & kev ua cawv.
Cov rooj zaum hauv chav ua noj, cov dab dej, cov thoob dej, cov khoom siv thiab cov khoom siv hluav taws xob
Cov vaj huam sib luag architectural, railings & trim
Cov thawv tshuaj lom neeg, suav nrog kev thauj mus los
Cov Khoom Siv Hloov Kub
Cov ntxaij vab tshaus woven los yog welded rau kev khawb av, kev khawb av thiab kev lim dej
Cov khoom siv threaded
Cov dej ntws
