Steel Phaj yog dab tsi? Txhais thiab Classification Overview
Lub phaj steel yog lub tiaj tus- dov steel khoom uas txhais los ntawm lub thickness ntau dua 3 hli. Nws yog ib qho tseem ceeb tshaj plaws ib nrab- cov khoom tiav siv thoob plaws kev lag luam hnyav, kev tsim kho, lub zog, thiab kev thauj mus los. Hlau daim hlau yog tsim los ntawm kub dov slabs los ntawm ib tug nruam caster los yog ingots los ntawm ib tug phaj zeb, ces txiav mus rau qhov ntev. Cov txheej txheem kev faib tawm feem ntau yog raws li cov thickness: nruab nrab phaj npog 3-20 hli, tuab phaj spans 20-60 hli, thiab ntxiv - phaj tuab tshaj 60 hli, ncav mus txog 300 hli nyob rau hauv tshwj xeeb zeb muaj peev xwm.
Tshaj li thickness, steel phaj yog cais los ntawm cov khoom muaj pes tsawg leeg rau hauv ob peb tsev neeg loj. Cov pa roj carbon steel phaj (ASTM A36, A516, A572) suav rau qhov ntim loj tshaj plaws thiab siv rau cov qauv siv dav dav, lub nkoj siab, thiab siab - siv zog. Stainless hlau phaj (304, 316, 310S, 2205 duplex) muaj corrosion kuj rau tshuaj, khoom noj khoom haus, thiab marine ib puag ncig. Alloy steel phaj (ASTM A387 Cr-Mo, A514 quenched{14}}thiab{15}}tempered) ua haujlwm siab-kub thiab siab- hnav khaub ncaws. Hnav{19}}cov phaj tiv taus (NM400/NM500, Hardox) yog tsim los rau kev puas tsuaj hauv kev khawb av thiab kev txav hauv av. Shipbuilding phaj (AH36/DH36/EH36) thiab boiler phaj (A516 Gr.70) yog ib pawg tshwj xeeb uas yuav tsum tau muaj ntawv pov thawj nruj.
Cov txheej txheem ntau lawm ntxiv subdivides steel phaj. Kub dov (HR) phaj yog tsim los saum toj no lub recrystallization kub, uas ua rau ib tug scaled nto thiab dav tolerances haum rau cov qauv siv. Txias dov (CR) phaj yog ua tiav nyob rau hauv chav tsev kub los ntawm kub - dov kauj, yielding ib tug du nto thiab nruj nreem qhov tseeb rau raug los yog precision daim ntaub ntawv. Thaum tshav kub kub- cov phaj kho tau zoo li qub, quenching, lossis tempering los txhim kho cov khoom siv rau kev xav tau kev pabcuam.
| Classification Basis | Qeb | Thickness Ntau | Tej kev siv |
|---|---|---|---|
| Thickness | Medium Phaj | 3-20 hli | General fabrication, automotive, teeb qauv |
| Thickness | Phaj tuab | 20-60 hli | Choj girders, siab hlab ntsha, nkoj hulls |
| Thickness | Ntxiv -Thick Plate | 60-300 hli | Heavy machinery, offshore platforms, tuag |
| Khoom siv | Carbon Steel Phaj | 3-300 hli | Structures, nkoj, general engineering |
| Khoom siv | Stainless hlau phaj | 3-150 hli | Tshuaj, khoom noj, tshuaj, marine |
| Khoom siv | Alloy Steel Phaj | 6-200 hli | Boilers, heat exchangers, siab -temp service |
Mainstream Steel Phaj Khoom Qib Sib Piv
Xaiv cov qib steel phaj kom raug yog qhov kev txiav txim siab tseem ceeb tshaj plaws hauv kev tsim khoom engineering. Qhov kev xaiv cuam tshuam ncaj qha rau cov qauv kev ncaj ncees, tus nqi tsim khoom, kev pabcuam corrosion lub neej, thiab kev ua raws cai. Cov kws kho tsheb yuav tsum sib npaug cov kev xav tau ntawm cov khoom siv sib npaug tiv thaiv tus nqi ntawm cov khoom siv thiab muaj. Peb cov txheej txheem tseem ceeb yog ASTM (Asmeskas), EN (European), thiab JIS (Nyiv), nrog rau GB (Suav) cov qauv kuj tau hais dav dav hauv kev lag luam Esxias.
Carbon steel phajtsim cov pob txha ntawm kev tsim kho kev lag luam. ASTM A36 yog cov qauv siv ntau tshaj plaws thoob ntiaj teb, muab 250 MPa yam tsawg kawg nkaus tawm los nrog cov weldability zoo heev. A516 Gr.70 yog qib siab tshaj plaws ntawm lub nkoj, muab 260 MPa tawm los thiab superior qis- qhov kub thiab txias cuam tshuam rau −30℃. A572 Gr.50 muab 345 MPa yield zog - 38% siab dua A36 - ua kom cov seem sib dua thiab txo vuam. EN sib npaug suav nrog S235JR (cov qauv dav dav) thiab S355J2 (siab{19}}lub zog nrog −20℃cuam tshuam).
Stainless hlau phaj qibnpog qhov kev ua haujlwm dav dav. Hom 304 (18% Cr, 8% Ni) yog qib workhorse rau kev tiv thaiv corrosion hauv cov khoom noj, khoom noj siv mis, thiab kev siv vaj tse. Hom 316 ntxiv 2-3% molybdenum rau superior chloride tsis kam, ua rau nws tus qauv rau marine thiab tshuaj ib puag ncig. Hom 310S (25% Cr, 20% Ni) tiv taus kev pabcuam txuas mus txog 1100℃rau kev siv rauv thiab boiler. Hom 321 yog titanium{15}}stabilized los tiv thaiv intergranular corrosion tom qab vuam. Rau lub zog hnyav thiab kev tiv thaiv corrosion, 2205 duplex stainless hlau (22% Cr, 5% Ni, 3% Mo) muaj kwv yees li ob npaug ntawm cov khoom muaj zog ntawm 316L nrog kev ntxhov siab zoo corrosion cracking kuj.
| Qib | Tawm tswv yim (MPa) | Tensile (MPa) | Ntsiab Alloying Elements | Daim ntawv thov tseem ceeb |
|---|---|---|---|---|
| ASTM A36 | Ntau dua lossis sib npaug li 250 | 400–550 | 0.26% C max | General lug, tsev |
| ASTM A516 Gr.70 | Ntau dua lossis sib npaug li 260 | 485–620 | 0.28% C, 0.85-1.2% Mn | Cov hlab ntsha siab, boilers |
| ASTM A572 Gr.50 | Ntau dua lossis sib npaug rau 345 | 450–600 | 0.23% C, Nb / V microalloy | High -cov qauv muaj zog |
| 304 Stainless hlau | Ntau dua lossis sib npaug rau 205 | Ntau dua lossis sib npaug li 515 | 18% Cr, 8% Ni | Khoom noj khoom haus, tshuaj, architectural |
| 316 Stainless hlau | Ntau dua lossis sib npaug rau 205 | Ntau dua lossis sib npaug li 515 | 16% Cr, 10% Ni, 2% Mo | Marine, kws |
| 2205 Duplex | Ntau dua lossis sib npaug li 450 | Ntau dua lossis sib npaug rau 655 | 22% Cr, 5% Ni, 3% Mo | Tshuaj, sab nrauv, siab - zog |
Yuav Ua Li Cas Nyeem Daim Hlau Phaj Core Specifications
Txhua steel phaj yuav pib nrog peb qhov tshwj xeeb qhov ntev: thickness × dav × ntev. Cov qhov ntev no yuav tsum tau qhia meej meej hauv millimeters rau cov qauv metric lossis ntiv tes rau imperial. Qhov ntau thiab tsawg xws li 1500 × 6000 mm los yog 4' × 8' muab qhov zoo tshaj plaws muaj thiab tus nqi, thaum kev cai qhov ntev yog ua tau nrog tsawg kawg nkaus txiav txim kom muaj nuj nqis thiab ntev sij hawm txhuas. Nco ntsoov qhia seb qhov ntev yog qhov nominal lossis yam tsawg kawg nkaus, raws li cov thickness kam rau ua txawv ntawm tus qauv.
Cov cuab yeej cuab tam txhais cov phaj lub peev xwm. Lub zog tawm los (MPa) qhia qhov kev ntxhov siab ntawm qhov pib deformation mus tas li. Tensile zog (MPa) sawv cev rau qhov siab tshaj plaws kev ntxhov siab ua ntej tawg. Elongation (%) ntsuas ductility - tseem ceeb rau kev tsim thiab khoov kev ua haujlwm. Kev cuam tshuam lub zog (J) kuaj ntawm qhov ntsuas kub (feem ntau yog −20℃lossis −40 degree) ntsuas qhov nkig tawg tsis kam, qhov tseem ceeb rau qis - kev pabcuam kub.
Kev tswj cov tshuaj muaj pes tsawg leeg tseem ceeb sib npaug. Cov ntsiab lus carbon ncaj qha cuam tshuam rau weldability: qis carbon (tsawg dua lossis sib npaug li 0.25%) ua rau vuam yam tsis muaj preheat rau feem ntau thicknesses. Manganese (Mn) pab txhawb lub zog thiab deoxidation. Silicon (Si) yog deoxidizer. Phosphorus (P) thiab sulfur (S) yog impurities khaws cia rau theem qis (feem ntau Tsawg dua lossis sib npaug li 0.035% txhua) kom tsis txhob kub luv thiab txo qhov tawv. Rau lub nkoj siab thiab qis - qhov kub thiab txias, kev txwv nruj dua.
Steel Phaj Nto Kho thiab Kev Pabcuam
Cov phaj hlau tsis tshua nkag mus rau hauv kev ua haujlwm raws li -rolled condition. Kev kho deg txhim kho corrosion kuj, zoo li, los yog txheej adhesion. Rau stainless hlau, 2B tiav (txias- dov, annealed, pickled, maj mam dov) yog tus qauv thoob ntiaj teb rau cov khoom siv tshuaj thiab khoom noj. BA (ci annealed) tsim daim iav-zoo li nto rau kev siv vaj tse thiab khoom siv. No.4 tiav (150-grit polished) muab txhuam satin zoo li rau chav ua noj thiab elevator panels. Cov pa roj carbon steel feem ntau tau txais sandblasting rau qib Sa2.5 rau kev tshem tawm cov nplai, pickling rau cov nyiaj huv si, lossis kub-dip galvanizing ib ASTM A123 rau kev tiv thaiv sab nraum zoov.
Cov kev pabcuam ua haujlwm hloov cov phaj nyoos rau hauv kev npaj - rau - nruab cov khoom. Kev txiav yog thawj zaug ua haujlwm tshaj plaws: nplaim taws txiav cov phaj tuab 6-300 hli kev lag luam, plasma txiav excels ntawm 6-50 hli nruab nrab phaj nrog ceev ceev, thiab laser txiav ua tiav ± 0.1 hli precision rau nyias mus rau nruab nrab thicknesses. Cov kev pabcuam ntxiv muaj xws li beveling rau kev npaj weld, khoov thiab dov rau cov ntu nkhaus, drilling rau bolted kev sib txuas, thiab kev kho cua sov rau kev ntxhov siab lossis kev txhim kho cov khoom. ManufacturerPipe muab kev sib xyaw ua ke hauv ib lub ru tsev, tshem tawm cov nqi thiab ncua ntawm ntau tus neeg ua haujlwm subcontractors.
Steel Phaj Kev Lag Luam Daim Ntawv Thov Txheej Txheem
Steel daim hlau pab txhua qhov kev lag luam loj. Hauvtsev thiab infrastructure, siab- nce lub tsev ncej, ntev- ncua chaw ntau pob ru tsev, thiab choj girders cia siab rau cov pa roj carbon steel phaj hauv qib A36, A572 Gr.50, thiab S355J2. Thicknesses muaj li ntawm 8 hli rau cov tswv cuab theem nrab mus rau 100 hli rau cov kab hauv qab phaj thiab kev sib txuas hnyav.
Covsiab hlab ntsha thiab boilerKev lag luam yog tswj hwm los ntawm ASME Boiler thiab Pressure Vessel Code cov cai. A516 Gr.70 dominates rau nruab nrab- kev pabcuam kub, thaum A387 Cr-Mo qib ua haujlwm siab- kub (400–550 degree) hydrogen kev pabcuam. Phaj tuab yog txiav txim siab los ntawm kev tsim siab ntawm ASME VIII Division 1 lossis 2 txoj cai, feem ntau yuav tsum tau kuaj xyuas tag nrho.
Shipbuilding thiab marine engineeringxav tau kev faib pawg neeg muaj ntawv pov thawj daim hlau. ASTM A131 qib AH36, DH36, thiab EH36 muab kev nce qib qis -kub toughness rau cov qauv hull. Cov phaj yuav tsum nqa cov ntawv pov thawj hauv zej zog (DNV, ABS, Lloyd's, CCS, BV) thiab ua tau raws li NDT nruj, tshwj xeeb tshaj yog rau cov tuab siab tshaj 20 hli thiab cov cheeb tsam kev ntxhov siab tseem ceeb.
Engineering tshuabxav tau hnav- daim hlau tiv taus zoo li NM400/NM500 lossis Hardox 400/500 rau cov thoob excavator, cov tsheb thauj khoom pov tseg, cov crushers, thiab chutes. Cov phaj no sib xyaw ua ke siab tawv (360–500 HB) nrog kev cuam tshuam zoo thiab feem ntau yog muab rau hauv qhov quenched - thiab - tempered mob.
Vim li cas thiaj xaiv manufacturerspipe.com rau Steel Phaj Procurement?
ManufacturerPipe coj ntau xyoo ntawm kev lag luam steel kev paub rau txhua qhov kev txiav txim. Peb tuav ncaj qha zeb muab kev sib raug zoo nrog cov neeg tsim khoom loj hauv tsev, ua kom cov nqi sib tw thiab kev faib ua ntej thaum lub sij hawm nruj kev lag luam. Peb cov khoom muag npog tag nrho cov spectrum los ntawm carbon steel thiab stainless hlau los ntawm alloy, hnav-resistant, thiab nkoj phaj nyob rau hauv thicknesses ntawm 3 hli mus rau 300 hli.
Peb cov kev sib xyaw ua ke muaj peev xwm ua rau peb sib nrug ntawm cov neeg lag luam ib txwm muaj. Peb ua cov nplaim taws, txiav cov ntshav, txiav laser, khoov, dov, thiab beveling hauv -tsev - lub ntsiab lus ntawm ib qho kev txiav txim, ib lub luag haujlwm zoo, thiab xa khoom sai. Txhua lub phaj yog rov qab los ntawm tag nrho cov ntaub ntawv: ISO 9001, CE, PED, thiab cov ntawv pov thawj kev faib tawm hauv zej zog. Txawm hais tias koj xav tau 10 daim phiaj rau qhov project nkoj siab lossis 500 tons rau tus choj girder, peb pab pawg muag khoom kom ntseeg tau tias koj tau txais qib raug, kev qhia tshwj xeeb, thiab ua tiav rau koj daim ntawv thov.
Xav tau steel phaj rau koj qhov project tom ntej?
Hu rau peb pab pawg muag khoom rau kev sib tw nqi ntawm ASTM, EN, thiab JIS tus qauv steel daim hlau. Mill daim ntawv pov thawj muab nrog txhua qhov kev txiav txim.
Thov ib daim Quote
Cov khoom siv hlau phaj
