Thawj qhov sib txawv ntawm cov qib hauv SA283 / A283 specification yog nce qhov tsawg kawg nkaus tawm lub zog, nrog rau kev hloov kho nyob rau hauv tshuaj muaj pes tsawg leeg. Tag nrho yog cov dav dav -lub hom phiaj qis- carbon structural steel daim hlau nrog zoo weldability thiab formability.
Ntawm no yog ib lub rooj sib piv uas qhia txog qhov sib txawv tseem ceeb:
| Khoom | Qib A | Qib B | Qib C | Qib D |
|---|---|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 24,000 psi (165 MPa) | 27,000 psi (185 MPa) | 30,000 psi (205 MPa) | 33,000 psi (230 MPa) |
| Yam tsawg kawg Tensile Strength | 45,000 psi (310 MPa) | 50,000 psi (345 MPa) | 55,000 psi (380 MPa) | 60,000 psi (415 MPa) |
| Cov ntsiab lus Carbon Hom (Max) | Tsawg tshaj (~ 0.17%) | Tsawg (~ 0.22%) | Nruab nrab (~ 0.24%) | Qhov siab tshaj (~ 0.27%) |
| Manganese Cov ntsiab lus (Max) | 0.90% | 0.90% | 0.90% | 0.90% (tab sis feem ntau siab dua qhov tseeb) |
| Primary Trade-tawm | Qhov zoo tshaj plaws Formability & Weldability | Zoo tshuav | Zoo zog | Lub zog siab tshaj plaws (hauv cov qauv no) |
| Tus nqi txheeb ze | qis tshaj | Siab dua me ntsis | Nruab nrab | Siab tshaj |
Cov ncauj lus kom ntxaws:
1. Mechanical Strength (Qhov txawv qhov txawv)
Cov qhab nia yog qeb los ntawm kev ua kom muaj zog:
Qib A: Tsawg zog, siab tshaj ductility.
Qib B: Lub zog muaj zog.
Qib C: Zoo, feem ntau nruab nrab - lub zog ntau.
Qib D: Lub zog siab tshaj plaws nyob rau hauv A283 specification.
Qhov no tso cai rau cov neeg tsim qauv xaiv qhov tsawg kawg nkaus lub zog xav tau rau daim ntawv thov, optimizing tus nqi thiab kev ua haujlwm.
2. Tshuaj muaj pes tsawg leeg
Txhawm rau kom ua tiav lub zog siab dua, cov ntsiab lus tso cai carbon nce ntawm Qib A mus rau Qib D. Cov pa roj carbon ntau ntxiv zog tab sis me ntsis txo weldability thiab formability.
Qib A (qis tshaj C): Yooj yim tshaj plaws rau vuam thiab tsim, feem ntau zam txim.
Qib D (siab tshaj C): Tej zaum yuav xav tau kev saib xyuas me ntsis thaum lub sij hawm vuam (xws li, preheat rau cov seem tuab) thiab yog me ntsis ductile.
3. Daim Ntawv Thov & Kev Qhia Kev Xaiv
Xaiv Qib A: Rau qhov tsim tau zoo heev, tsis yog -cov npog tseem ceeb, vaj tse, lossis qhov yooj yim tshaj plaws ntawm kev tsim khoom yog qhov tseem ceeb.
Xaiv Qib B lossis C: Rau cov khoom siv dav dav, cov thawv ntim khoom, lub teeb thav duab, thiab cov haujlwm feem ntau tsim. Qib C feem ntau yog lub neej ntawd "workhorse".
Xaiv Qib D: Thaum xav tau lub zog siab dua rau cov khoom siv uas muaj kev ntxhov siab ntau dua tab sis daim ntawv thov tsis pom zoo rau tus nqi siab -lub zog qis- alloy (HSLA) steels xws li A572.
4. Kev sib koom ua ke tseem ceeb
Txhua Qib: Tsis muaj qhov yuav tsum tau muaj kev cuam tshuam toughness (Charpy). Lawv tsis haum rau qhov qis - kub lossis poob siab - cov ntawv thov tsis muaj kev xav tshwj xeeb.
Txhua Qib: Tsis yog rau cov hlab ntsha siab. Rau cov hlab ntsha siab, cov ntaub ntawv zoo li SA516 (uas yuav tsum muaj toughness) yuav tsum tau siv.
Cov ntsiab lus:
Cov qib A283 / SA283 muab cov spectrum ntawm lub zog nyob rau hauv tib tsev neeg ntawm yooj yim fabricated carbon hlau. Kev xaiv yog kev lag luam ncaj nraim- tawm: qib siab dua=lub zog siab dua=me ntsis formability / weldability=tus nqi siab dua. Rau feem ntau cov fabrication, Qib B lossis Qib C muab qhov sib npaug zoo tshaj plaws.
1. Dab tsi yog SA283 Qib C?
SA283 Qib C yog qhov qis-carbon, dav dav- lub hom phiaj steel phaj hauv ASTM A283 tus qauv, feem ntau siv rau qis- kev siv cov qauv kev ntxhov siab xws li tso tsheb hlau luam, bins, thiab lub tsev thav duab uas yuav tsum tau siv vuam thiab sib sau.
2. Dab tsi yog qhov Yield Strength ntawm SA283 Qib C?
Qhov tsawg kawg nkaus tawm lub zog ntawm SA283 Qib C yog 30,000 psi (205 MPa), ua rau nws tsim nyog rau cov ntawv thov nrog cov qauv nruab nrab.
3. Qhov txawv ntawm SA283 Qib A, B, C, thiab D yog dab tsi?
Thawj qhov sib txawv yog nce zog: Qib A (24 ksi min yield), Qib B (27 ksi), Qib C (30 ksi), thiab Qib D (33 ksi). Cov qib siab dua muaj zog dua tab sis tsawg dua formability.
4. Puas yog SA283 Qib C Weldable?
Yog lawm, SA283 Qib C muaj qhov zoo tshaj plaws weldability vim nws cov ntsiab lus carbon tsawg, ua rau nws tsim nyog rau feem ntau txoj kev vuam xws li SMAW, GMAW, thiab SAW yam tsis tas yuav tsum muaj cov txheej txheem nyuaj.
5. Dab tsi yog SA283 Qib C sib npaug hauv Tebchaws Europe?
Qhov sib npaug nyob sab Europe zoo tshaj plaws yog S235JR (EN 10025-2) raws li qhov sib piv cov khoom siv zog (~ 235 MPa nominal) thiab daim ntawv thov dav dav. Nco ntsoov tias S235JR muaj qhov yuav tsum tau muaj kev cuam tshuam toughness.
6. Qhov twg yog SA283 Qib C nquag siv?
Nws yog siv nyob rau hauv fabricating cia tso tsheb hlau luam, dej yees, ductwork, lub tsev thav duab, cov khoom siv ua liaj ua teb, thiab lwm yam structural Cheebtsam tsis raug rau siab los yog siab.
7. SA283 Qib C puas tuaj yeem Galvanized?
Yog lawm, nws qis- carbon, qis- alloy muaj pes tsawg leeg ua rau nws yog ib tus neeg sib tw zoo tshaj plaws rau kub -dip galvanizing, feem ntau siv rau sab nraum zoov cov khoom siv uas xav tau kev tiv thaiv corrosion.
8. Cov tshuaj muaj pes tsawg leeg ntawm SA283 Qib C yog dab tsi?
Cov muaj pes tsawg leeg muaj xws li Carbon (max 0.24%), Manganese (max 0.90%), Phosphorus (max 0.035%), thiab Sulfur (max 0.04%), kom ntseeg tau zoo weldability thiab formability.
9. Puas yog SA283 Qib CA Pressure Vessel Steel?
Tsis yog, nws tsis raug ntsuas rau siab - tuav kev pabcuam. Rau cov hlab ntsha siab, cov ntaub ntawv zoo li SA516 Qib 60 lossis 70 (nrog rau qhov yuav tsum tau ua kom tawv nqaij) yog tsim tshwj xeeb thiab coded rau lub hom phiaj ntawd.
10. Qhov txawv ntawm SA283 thiab A283 yog dab tsi?
Tsis muaj kev sib txawv. A283 yog tus qauv ASTM cov ntaub ntawv, thaum SA283 yog ASME Boiler thiab Pressure Vessel Code txais yuav tib tus qauv, yuav tsum tau ASME- ntawv pov thawj raws cai rau cov cai- khi cov khoom.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
