JIS G3444 STK400 yog hom carbon hlau yeeb siv rau cov qauv txheej txheem dav dav. Nws yog tsim ua raws li Nyiv Industrial Txuj Ci (JIS) G3444, uas qhia meej txog cov kev xav tau rau cov qauv hlau rau kev siv dav hlau.
Tshuaj Muaj Tshuaj
| Tshuaj Muaj Tshuaj1, Max (%) | |||||
| Carbon (c) | Silicon (si) | Manganese (mn) | Phosphorus (p) | Sulphur (s) | |
| Stk 400 | 0.25 | - | - | 0.04 | 0.04 |
| 1Yog tias tsim nyog, alloying ntsiab lus tshaj li teev nyob rau hauv lub rooj no yuav ntxiv. | |||||
- Carbon (c): Mus txog 0. 25%. Carbon yog thawj qhov tawv tawv hauv cov hlau, muab Lub zog thiab hardness tab sis txo qis ductility raws li feem pua nce ntxiv.
- Silicon (si): Tsis tau teev tseg, tab sis feem ntau cov qib qis tuaj yeem pab txhawb kom txhim kho lub zog yam tsis muaj kev cuam tshuam ntau dua.
- Manganese (mn): Tsis tau teev tseg, tab sis manganese yog paub kom nce lub zog thiab hardness thaum tseem txhim kho cov hlau tiv thaiv kev hnav thiab deformation.
- Phosphorus (p): Ntau tshaj ntawm 0. 040%. Phosphorus tuaj yeem ua kom lub zog ntawm cov hlau tab sis feem ntau tswj tau cov qib siab dua li cov qib siab tuaj yeem txo cov qauv sib zog thiab tawv.
- Sulphur (s): Ntau tshaj ntawm 0. 040%. Sulphur muaj peev xwm txhim kho machinability tab sis feem ntau yog txwv nyob rau hauv cov qauv txheej txheem txheej txheem raws li nws tuaj yeem ua kom txo qis thiab nce siab ntsws.
Cov Khoom Siv Neeg Kho Tshuab
| Cov Khoom Siv Neeg Kho Tshuab | ||||||
| Lub cim ntawm qib |
Lub tensile lub zog N / mm² |
Paib ntawm pov thawj txhawj xeeb N / mm² |
Elongation (a) |
Ua kom tiaj | Ntaus | |
| Qho deb nruab nrab daim hlau (H) |
Khoov ceg kauma) |
Nyob hauv qho dav |
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| Kev thov sab nraud lub cheeb | ||||||
| Tag nrho cov sab nraud Diameters |
Tag nrho cov sab nraud Diameters |
- | Tag nrho cov sab nraud Diameters |
50 hli max. | ||
| Tus kab laug sk400 | 400 min. | 235 feeb. | 34%. | 2/3 D | 90 degree | 6D |
| Nco tseg 1 d ntawm cov lus no yog sab nraud ntawm lub raj ntawm cov hlab. NCO 2 1 n / hli =1 mpa mpa Tsab ntawva) Cov qauv ntawm khoov kaum sab xis yuav yog qhov pib taw tes khoov. |
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- Tensile lub zog (r _ m):Stk400 muaj qhov tsawg kawg tensile lub zog ntawm 400 n / mm². Lub zog tensile yog qhov kev ntxhov siab tshaj plaws uas cov khoom tuaj yeem tiv thaiv thaum tab tom ncab lossis rub tawm ua ntej tawg. Cov cuab yeej no yog qhov tseem ceeb rau cov ntawv thov uas cov yeeb nkab steel yuav raug rau cov yeeb ncuab tensile, kom cov yeeb nkab cov qauv kev ntseeg hauv qab.
- Yield point (r {{0}} p0.2):Cov txiaj ntsig tau, lossis pov thawj kev ntxhov siab, rau STK400 yog qhov tsawg kawg ntawm 235 n / mm². Qhov no yog kev ntxhov siab uas cov khoom pib ua kom deform plastically. Paub txog cov txiaj ntsig tau yog qhov tseem ceeb rau kev tsim qauv qauv uas cov yeeb nkab yuav muaj kev ntxhov siab ntau yam tsis muaj kev cuam tshuam loj.
- Elongation (a):Feem pua Ejen rau Stk400 yog tsawg kawg 34%. Elongation yog qhov feem pua nce nyob rau hauv qhov ntev ntawm cov khoom raws li lub kaum tawm kev ntxhov siab ua ntej pob txha lov. Ib qho kev tshawb fawb ntau dua qhia tau zoo dua ductility, uas yog qhov tseem ceeb rau kev tsis muaj kev cuam tshuam tsis muaj kev tawg.
qhov sib txawv ntawm JIS G3444 STK400 thiab STK490
Tshuaj Muaj Tshuaj
- Tus kab laug sk400muaj cov ntsiab lus ntau tshaj plaws ntawm cov ntsiab lus carbon {0}}}}}. 25% thiab tus lej sulfur (p) Cov.
- Stk490muaj cov ntsiab lus ntau kawg ntawm cov ntsiab lus ntawm {{0}}} Txhua.
Cov ntsiab lus manganese ntau dua hauv Stk490 ua rau nws lub zog txhim kho thiab kev sib piv ua kom muaj zog piv rau STK400.
Cov Khoom Siv Neeg Kho Tshuab
- Tus kab laug sk400Muaj lub zog tsawg tshaj plaws ntawm 400 n / mm² thiab ib qho tsawg kawg tau pom tau taw tes lossis pov thawj kev ntxhov siab ntawm 235 n / mm².
- Stk490Muaj lub zog tsawg tshaj plaws ntawm 490 n / mm² thiab ib qho tsawg kawg tau tawm los yog pov thawj kev ntxhov siab ntawm 315 n / mm².
Stk490 lub ntswj ntau dua thiab cov txiaj ntsig zoo tshaj qhia tias nws muaj peev xwm tiv thaiv cov kev ntxhov siab ntau dua, ua rau nws xav tau cov qauv xav tau ntau dua.
Hauv kev xaus, thaum ob qho tib si stk400 thiab STK490 yog cov qauv roj carbon monoxent thiab cov qauv tshuaj, uas txiav txim siab lawv cov kev siv hauv cov qauv sib txawv thiab engineering cov qauv. Stk400 tau haum rau kev siv dav dav, Whereas Stk490 yog xaiv rau cov ntawv thov kom cov kev xav tau muaj zog thiab lub sijhawm ntev.
Cov Ntawv Thov
- Civil engineering thiab architecture: STK400 tau siv hauv kev tsim kho ntawm cov hlau tshuab, scaffoldings, footing piles, lub hauv paus pales, thiab piles rau kev thaj av av. Nws lub zog thiab ductility puas ua nws haum rau cov ntawv thov uas ntseeg tau thiab kav ntev yog qhov tseem ceeb heev.
- Choj Engineering: STK400 lub zog zoo thiab lub zog ua kom nws tsim nyog rau cov kab barcelona xws li ci, Piers, thiab abutments.
- Kev tsa tsev: Nws yog qhov siv tau rau lub moj khaum, vov tsev qub, thiab sab nrauv phab ntsa, muab cov kev txhawb nqa tsim nyog thiab ruaj khov.
- Muaj Cov Ntawv Thov: STK400 tau siv hauv kev tsim kho ntawm cov qauv kev txhawb nqa, lub tshuab sib txuas, thiab cov khoom siv dav dav thiab kev ua haujlwm yog yuav tsum tau ua.
Cim npe nrov: JIS G3444 STK400 Hollow Secture, Tuam Tshoj, Tuam Tshoj chaw tsim khoom, Hoobkas, nqe
