Thaum nws los txog rau kev tsim khoom muaj kev nyab xeeb thiab ruaj khov,P275N siab lub nkoj steel phajyog ib qho ntawm feem txhim khu kev qha thiab dav siv cov ntaub ntawv nyob rau hauv European lag luam.
P275N siab lub nkoj steel phaj
Raws li tus kws tshaj lij steel khoom, Gnee Steel muab siab - zoo EN 10028-3 P275N daim hlau nrog kev ua haujlwm ruaj khov, tus nqi sib tw, thiab xa khoom thoob ntiaj teb. Yog tias koj tab tom nrhiav kev daws teeb meem zoo rau boilers, tso tsheb hlau luam, lossis cov hlab ntsha siab, P275N yog qhov kev xaiv ntse thiab muaj pov thawj.
EN 10028-3 P275N Siab Vessel Steel yog dab tsi?
P275N yog ib qho normalized, nplua -cov nplej tsis yog- alloy steel tsim tshwj xeeb rau kev siv lub nkoj siab raws li EN 10028-3 tus qauv. Lub "P" sawv cev rau lub hom phiaj siab, thaum "275" qhia qhov tsawg kawg nkaus tawm lub zog ntawm 275 MPa.
Cov qib no tau siv dav vim nws qhov sib npaug zoo ntawm lub zog, toughness, thiab weldability, ua rau nws tsim nyog rau cov khoom siv ua haujlwm hauv nruab nrab mus rau qhov kub thiab txias.
Tshuaj muaj pes tsawg leeg ntawm P275N Steel
Cov tshuaj muaj pes tsawg leeg ntawm P275N yog ua tib zoo tswj xyuas kom zoo txhua yam kev ua tau zoo thiab weldability.
| Element | Cov ntsiab lus (%) |
|---|---|
| C (Carbon) | Tsawg dua los yog sib npaug li 0.20 |
| Si (Silicon) | Tsawg dua los yog sib npaug li 0.40 |
| Manganese (Mn) | 0.90 – 1.50 |
| P (phosphorus) | Tsawg dua lossis sib npaug li 0.025 |
| S (Sulfur) | Tsawg dua lossis sib npaug li 0.015 |
| N (Nitrogen) | Tsawg dua lossis sib npaug li 0.012 |
Cov ntsiab lus qis carbon ua kom zoo weldability, thaum tswj cov nitrogen pab ua tiav cov qauv zoo, txhim kho toughness.
Mechanical Properties ntawm P275N Steel Phaj
P275N muaj cov khoom siv txhim khu kev qha thiab kev cuam tshuam tsis zoo, uas yog qhov tseem ceeb rau kev ua haujlwm siab -cov ntaub ntawv kabmob.
| Thickness (hli) | Yield zog (MPa) | Tensile zog (MPa) | Elongation (%) |
|---|---|---|---|
| Tsawg dua los yog sib npaug li 16 | Ntau dua lossis sib npaug li 275 | 390 – 530 | Ntau dua lossis sib npaug 22 |
| 16 – 40 | Ntau dua lossis sib npaug rau 265 | 390 – 530 | Ntau dua lossis sib npaug 22 |
| 40 – 60 | Ntau dua lossis sib npaug li 255 | 390 – 530 | Ntau dua lossis sib npaug 22 |
| 60 – 100 | Ntau dua lossis sib npaug li 245 | 390 – 530 | Ntau dua lossis sib npaug 22 |
Cov txiaj ntsig no ua kom ntseeg tau tias cov khoom siv tuaj yeem tiv taus lub siab sab hauv yam tsis muaj deformation thaum tswj kom txaus ductility.
Qhov tseem ceeb ntawm P275N Siab Vessel Steel
1. Weldability zoo heev
P275N yog ib qho yooj yim rau welding siv cov txheej txheem vuam tsis tas yuav tsum tau ua kom muaj zog ua ntej lossis tom qab- kev kho mob, uas txo cov nqi tsim khoom.
2. Sib npaug zog thiab tawv
Nws muaj kev ruaj ntseg ua ke ntawm nruab nrab lub zog thiab siab toughness, txo qhov kev pheej hmoo ntawm brittle fracture nyob rau hauv dynamic loads los yog kub hloov.
3. Kev ua haujlwm siab zoo
Nrog lub zog tawm los ntawm 275 MPa, P275N tuaj yeem tiv taus lub zog sab hauv, ua kom ntev - lub sij hawm kev ncaj ncees ntawm cov hlab ntsha.
4. Tus nqi -Kev daws teeb meem zoo
Piv nrog cov qib siab dua alloy, P275N muab kev ua haujlwm txaus ntawm tus nqi qis, ua rau nws zoo tagnrho rau cov txheej txheem siab ntawm cov hlab ntsha.
Cov ntawv thov ntawm P275N Steel Phaj
P275N yog dav siv thoob plaws hauv kev lag luam uas muaj kev ruaj ntseg thiab kev nyab xeeb yog qhov tseem ceeb:
Petrochemical kev lag luam: reactors, cia tank, tshav kub exchangers
Fais fab nroj tsuag: chav - dej cais, boilers
Roj & roj: siab pipelines thiab hlab ntsha
Cov cuab yeej siv: compressed cua tso tsheb hlau luam, txheej txheem ntim
Nws versatility ua rau nws nyiam cov khoom siv rau ob qho tib si fabricators thiab engineering neeg cog lus.
P275N vs Lwm Lub Nkoj Siab Hlau
Muab piv nrog cov qib zoo sib xws:
P275N vs P355N: P355N muaj zog dua tab sis los ntawm tus nqi siab dua
P275N vs ASTM A516 Qib 60: P275N muab lub zog sib piv nrog cov qauv European zoo dua
P275N vs P265GH: P275N tau txhim kho kev ua tau zoo thiab kev ntseeg tau ntawm cov qauv
Vim li cas thiaj xaiv Gnee Steel rau P275N Phaj?
Kev xaiv tus neeg muag khoom raug yog ib qho tseem ceeb xws li xaiv cov khoom tsim nyog. Gnee Steel xyuas kom meej:
- Kev nruj nruj raws li EN 10028-3 cov qauv
- ruaj khov mechanical kev ua tau zoo thiab muaj ntawv pov thawj zoo
- Kev cai loj, txiav, thiab kev pabcuam
- Kev tsim khoom sai thiab xa khoom thoob ntiaj teb
- Kev tshaj lij export kev thiab kev txhawb nqa
Raws li tus kws tshaj lij steel xa khoom, Gnee Steel muab siab - zoo P275N steel daim hlau nrog cov khoom siv kho tshuab ruaj khov, kev tswj xyuas nruj, thiab xa khoom sai thoob ntiaj teb.
Txawm hais tias koj qhov project cuam tshuam nrog cov tso tsheb hlau luam, boilers, lossis reactors, xaiv cov khoom tsim nyog thaum pib tuaj yeem txo qhov ntev - cov kev pheej hmoo thiab cov nqi tu.
Yog tias koj tab tom sib piv ntau qib thiab tab tom nrhiav tus nqi - lwm txoj kev zoo yam tsis muaj kev cuam tshuam txog kev nyab xeeb, phau ntawv qhia no yuav pab koj nkag siab tias vim li cas P275N tsim nyog xav txog.
Hu rau tam sim no kom tau txais P275N steels Quote
Dab tsi yog qhov txawv ntawm P275N, P275NH, P275NL1, thiab P275NL2?
Qhov sib txawv tseem ceeb yog nyob rau hauv qhov ntsuas kub ntawm qhov ntsuas kub thiab siv tau rau kev ua haujlwm. Tag nrho plaub qib muaj qhov tsawg kawg nkaus tawm lub zog ntawm ntau dua lossis sib npaug rau 275MPa (rau thickness Tsawg dua lossis sib npaug rau 16mm) thiab ua raws li EN 10028-3 tus qauv:
P275N: Kev ntsuam xyuas cuam tshuam ntawm -20 degree, haum rau cov hlab ntsha ntawm qhov kub thiab txias thiab cov kav dej dav dav;
P275NH: Kev ntsuam xyuas cuam tshuam ntawm -20 degree, optimized rau siab -kev ua haujlwm kub, hloov mus rau nruab nrab- rau-siab kub siab hauv qab 350℃;
P275NL1: Kev ntsuam xyuas cuam tshuam ntawm -40 degree, haum rau cov tso tsheb hlau luam uas tsis muaj qhov kub thiab txias hauv cov cheeb tsam txias;
P275NL2: Kev ntsuam xyuas cuam tshuam ntawm -50 degree, muab qhov zoo tshaj plaws ultra-low kub toughness, yoog rau cov khoom siv cryogenic xws li kua nitrogen / LNG systems.
Yuav ua li cas yog tus lej sib raug rau plaub qib no?
P275N: 1.0483;
P275NH: 1.0485;
P275NL1: 1.0488;
P275 NL2: 1.1104.
Puas yog thickness cuam tshuam kev ua haujlwm?
Yog, nws ua. Thaum lub thickness ntau tshaj 16 hli, lub zog tawm los maj mam txo qis (piv txwv li, Ntau dua lossis sib npaug ntawm 245MPa rau 63 ~ 100mm), thiab qhov qis - kub toughness kuj poob me ntsis. Rau ultra- qhov kub thiab txias ua hauj lwm tej yam kev mob nrog thickness ＞40mm, nws raug nquahu kom ua qhov tseem ceeb ntawm P275NL2 thiab nce qhov piv txwv rau kev ntsuam xyuas cuam tshuam.
Cov cuab yeej cuab tam tseem ceeb ntawm plaub qib yog dab tsi?
Yield Strength (ReH): Ntau dua los yog sib npaug rau 275MPa rau thickness Tsawg dua los yog sib npaug rau 16mm, me ntsis txo nrog nce thickness (xws li, Ntau tshaj los yog sib npaug rau 255MPa rau 40 ~ 63mm);
Tensile zog (Rm): 410 ~ 560MPa;
Impact Energy (KV): Ntau dua lossis sib npaug rau 27J rau txhua qhov cuam tshuam qhov kub thiab txias (cov khoom siv tsis tu ncua ua tau raws li ntau dua lossis sib npaug rau 40J txhawm rau txhim kho kev nyab xeeb dua);
Elongation (A): Ntau dua lossis sib npaug li 22% ~ 24% (hloov nrog tuab).
Dab tsi yog qhov ntau ntawm qhov muaj nyob?
Thickness: 6mm ~ 300mm;
Dav: 1500mm ~ 4800mm;
Ntev: 6000mm ~ 18000mm;
Customized txiav, drilling, thiab beveling cov kev pab cuam muaj, nrog tsawg kawg txiav loj ntawm 500 × 500mm.
Lub weldability zoo li cas, thiab cov lus pom zoo welding yog dab tsi?
Nws muaj qhov zoo tshaj plaws weldability (CEV Tsawg dua lossis sib npaug rau 0.43%), nrog cov kev pom zoo:
Vuam Consumables: E5515-C1 rau phau ntawv arc vuam, H08MnA + F55A4 flux rau submerged arc vuam, thiab ER50-6 rau roj arc vuam;
Preheating Requirement: Tsis muaj preheating yuav tsum tau thickness tsawg dua los yog sib npaug rau 30mm; preheat rau 100 ~ 150℃rau thickness ~ 30mm;
Interpass Kub: Tsawg dua los yog sib npaug li 250 degree, nrog cov cua kub tswj ntawm 15 ~ 35kJ / cm;
Ncej -Kev kho cua sov (PWHT): Pom zoo rau cov phaj tuab (＞50mm) - kev ntxhov siab rau kev ntxhov siab ntawm 580 ~ 620℃rau 2 teev.
P275 series puas tuaj yeem hloov tau rau ASTM A516 Gr70 (American standard) lossis Q345R (Suav tus qauv)?
vs. ASTM A516 Gr70: Lub zog zoo sib xws, tab sis P275 series muaj qhov zoo dua qis dua -kub toughness
. P275 series yog qhov nyiam rau cov haujlwm nyob sab Europe, thaum ASTM A516 Gr70 haum rau North American cov haujlwm;
vs. Q345R (GB 713): Q345R muaj lub zog tawm los ntau dua (Ntau dua lossis sib npaug rau 345MPa), tab sis P275 series ua tau zoo nyob rau hauv qis- qhov kub thiab txias (-20℃cuam tshuam) thiab qhov kub thiab txias. Rau cov haujlwm thoob ntiaj teb, nws raug pom zoo kom xaiv raws li EN tus qauv ua ntej.
Dab tsi yog qhov txawv ntawm P275NL1 / NL2 thiab 16MnDR (Suav tus qauv)?
16MnDR (GB 3531): Kev ntsuas cuam tshuam ntawm -40 degree, tawm lub zog ntau dua lossis sib npaug rau 315MPa, tsim nyog rau cov haujlwm kub hauv tsev;
P275NL1: Kev ntsuas cuam tshuam ntawm -40 degree, tawm lub zog ntau dua lossis sib npaug ntawm 275MPa, koom nrog European tus qauv system nrog kev lees paub thoob ntiaj teb siab dua;
P275NL2: Kev sim cuam tshuam ntawm -50 degree, muab qhov zoo dua qhov kub thiab txias dua li 16MnDR, hloov tau mus rau qhov ua haujlwm hnyav dua cryogenic.
| Lwm cov hlau phaj | ||||
| Lub npe | Khoom siv | Specification (hli) | Tos | Lus ceeb toom |
| Clad steel phaj | P265GH+410,S355JR+410,A516Gr70+316, A537CL1+304L,Q235B+304L,Q345B+304, A516Gr70(NACE)+410,A537CL1+904L, A537CL1+316L,A516Gr70+304L,A537CL1+304 ,A516Gr70+410,A516Gr70+904L |
2-300mm (raws li phaj), 1-50mm (Composited phaj) | / | UT, AR, TMCP.Normalized, Quenched thiab Tempered, Z Direction Test, Charpy V-Ntch impact TestThe Third Party Test, Coated or Shot Blasting and Painting. |
| Tsawg Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered, tswj dov, kub dov, Kub dov, 1st tshuaj xyuas, 2nd tshuaj ntsuam, 3rd tshuaj ntsuam |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SAG281G, SAG281G SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R{30}}HIC) | 3 - 300 | 8650 | Normalizing, tempered, tswj dov, kub dov, Kub dov, 1st tshuaj xyuas, 2nd tshuaj ntsuam, 3rd tshuaj ntsuam |
| Siab -Plate muaj zog | WH785D/E,Q960D/E,Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched thiab tempered |
| Hnav-Resistant Phaj | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched thiab tempered |
| Choj Phaj | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Kub dov, normalized, kub dov tswj dov, quenched thiab tempered + toughness thiab brittleness |