ASTM A387 Qib 5 Qib 2(tseem raug xaiv raws li ASME SA 387 Qib 5 Chav Kawm 2) yog qhov zoo - zoochromium{0}}molybdenum alloy steel phajtsim rau siv nyob rau hauv welded boilers thiab siab hlab ntsha ua hauj lwm nyob rau hauv siab kub.
ASTM A387 GR 5 CLASS 2 Phaj Specification
Qib: ASTM A387 Gr 5 CL.2 Alloy Steel Phaj
Txuj: ASTM A387 / ASME SA387
Dav: 1000mm-4500mm
Thickness: 5mm-150mm
Ntev: 3000mm-18000mm
Kev ntsuas kub: -52 ° C
Txheej txheem: Kub-Rolled (HR)
ASTM A387 GR 5 CLASS 2 Cov tshuaj muaj pes tsawg leeg
| Qib | C | Mn | P | S | Si | Cr | Mo |
|---|---|---|---|---|---|---|---|
| A387 Gr.5 | 0.05-0.21 | 0.55-0.80 | 0.025 | 0.025 | 0.15-0.40 | 0.50-0.80 | 0.45-0.60 |
ASTM A387 GR 5 CLASS 2 Mechanical Properties
| Chav kawm | Tensile (MPa) | Tawm tswv yim (MPa) | Elong. (50 hli) | Elong. (200 hli) | Reduc'n ntawm Cheeb Tsam * |
|---|---|---|---|---|---|
| Chav Kawm 1 | 415 - 585 | 205 feeb | 18% min | - | 40% min |
| Chav kawm 2 | 515 - 690 | 310 min | 18% min | - | 40% min |
Qib sib npaug
| Lub teb chaws | Teb chaws USA | Teb chaws Europe | Lub teb chaws Yelemees | ENGLAND | FRANCE | RUSSIA |
|---|---|---|---|---|---|---|
| STANDARDS | ASTM | TS EN 10028 | DIN | BS | TIAB SA 36206 | GOST |
| Qib 5 | A387 | X12CrMo5 | - | - | - | 15 KH5 |
ua
1. Melting thiab Casting
Melting: Ua los ntawm Electric Arc Furnaces (EAF) lossis Basic Oxygen Furnaces (BOF).
Refining: Feem ntau siv lub tshuab nqus tsev degassing kom tshem tawm cov impurities thiab gases (hydrogen/nitrogen), ua kom lub cev huv si.
Chemistry: Precisely alloyed nrog 4.00-6.00% Chromium thiab 0.45-0.65% Molybdenum.
2. Kub Rolling
Steel slabs yog rhuab mus rau kwv yees li 1,700℃F (926 degree) thiab dhau los ntawm ntau lub chais kom ua tiav cov phaj tuab kawg, feem ntau yog li ntawm 6mm txog 300mm.
3. Kev kho cua sov (Qhov tseem ceeb rau chav kawm 2)
Chav Kawm 2 xav tau kev kho cua sov tshwj xeeb kom ua tiav lub zog tensile siab dua (75-100 ksi) piv rau Chav Kawm 1.
Normalizing: Ua kom sov siab tshaj qhov ntsuas kub tseem ceeb kom ua kom zoo dua cov qauv nplej, ua raws li cua txias.
Tempering: Reheated rau qhov tsawg kawg nkaus ntawm 1,300℃F (705 degree) kom ua tau raws li qhov xav tau ductility thiab lub zog sib npaug.
Lwm txoj kev: Thaum tso cai, ua kom txias txias (kua quenching) los ntawm austenitizing kub raws li tempering yuav siv tau.
4. Fabrication (Machining & Forming)
Txiav: Cov phaj yog txiav kom loj siv cov nplaim, ntshav, lossis laser txiav.
Kev Tsim: Mechanical shaping lossis drilling yog ua raws li kev tsim cov nkoj tshwj xeeb.
Vuam: Tsim los rau siab weldability; Txawm li cas los xij, Post-Weld Heat Treatment (PWHT) feem ntau yuav tsum tau los daws kev ntxhov siab thiab tiv thaiv kev tawg ntawm thaj chaw vuam.
5. Kev tshuaj xyuas thiab kuaj
Txhawm rau txheeb xyuas kev ua raws li ASTM / ASME cov qauv, cov kev sim hauv qab no tau ua:
Mechanical: Tensile tests thiab Charpy V-Ntch impact tests.
Tsis yog-Kev puas tsuaj: Ultrasonic Examination (UT) thiab Magnetic Particle Examination kom pom qhov tsis xws luag sab hauv lossis saum npoo.
Daim ntawv pov thawj: Txhua lub phaj feem ntau yog muab daim ntawv pov thawj Mill Test (MTC).
Cov Ntawv Thov Kev Lag Luam tseem ceeb
Petrochemical Kev Lag Luam:Fabrication ntawm siab - cov hlab ntsha siab, cov khoom siv hluav taws xob, cov khoom sib cais, thiab cov tank cia.
Roj Refining:Kev tsim kho cov yees, cov catalytic cracking units, thiab hydrogenation units.
Kev tsim hluav taws xob:Siv nyob rau hauv industrial boilers thiab pressurized khoom tsim los rau siab kub kev pab cuam.
Natural Gas & Fertilizer Production:Kev tsim cov roj tso tsheb hlau luam, cov kav xa hluav taws xob, cov khoom siv ammonia synthesis, thiab urea synthesis towers.
Cov cuab yeej tshwj xeeb:kev tsim cov reactors, cov khoom siv rauv, thiab cov kav dej.
Vim li cas thiaj siv
Qhov tshwj xeeb alloy muaj pes tsawg leeg (4.00-6.00% Chromium thiab 0.45-0.65% Molybdenum) muab:
Kev kub ntxhov siab:Ua kom muaj kev ncaj ncees ntawm qhov kub thiab txias li 1000℃F (538 degree).
Corrosion Resistance:Siv tau hauv "kev pabcuam qaub" ib puag ncig uas muaj cov xov xwm corrosive zoo li hydrogen sulfide.
Superior Strength:Chav Kawm 2 muaj lub zog tensile siab dua (75-100 ksi) dua li Chav Kawm 1, ua rau nws zoo tagnrho rau kev siv siab dua.
Tau txais cov nqe lus hais txog A387 Qib 5 Chav Kawm 2, Hu rau GNEE Steel.
ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 yog chromium -molybdenum alloy steel phaj tau teev tseg rau kev siv lub nkoj siab. Nws muaj lub zog zoo thiab nkag siab tsis kam ntawm qhov kub siab. Cov khoom siv feem ntau yog normalized thiab tempered kom ua tau raws li qhov xav tau ntawm cov khoom siv kho tshuab, ua kom muaj kev ntseeg siab nyob rau hauv siab - qhov kub thiab txias qhov chaw.
Dab tsi yog cov ntsiab lus tseem ceeb hauv ASTM A387 Qib 5 Chav Kawm 2?
ASTM A387 Qib 5 Chav Kawm 2 muaj chromium thiab molybdenum ua cov ntsiab lus alloying, uas txhim kho nws qhov siab - kub lub zog thiab corrosion kuj. Cov pa roj carbon, manganese, silicon, thiab cov khoom me me ntawm lwm cov ntsiab lus tseem tuaj yeem ua kom zoo dua weldability thiab kev ua haujlwm txhua yam thaum tsim khoom thiab kev pabcuam.
Lub zog tensile ntau yam ntawm ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 feem ntau muaj lub zog tensile ntawm 60 ksi thiab 80 ksi. Qhov ntau yam no muab qhov sib npaug ntawm lub zog thiab kev ua haujlwm zoo, ua rau nws tsim nyog rau cov khoom siv ntawm cov hlab ntsha uas ua haujlwm nyob rau hauv nruab nrab mus rau siab - qhov kub thiab txias.
Dab tsi yog qhov tsawg kawg nkaus lub zog yuav tsum tau rau ASTM A387 Qib 5 Chav Kawm 2?
Qhov tsawg kawg nkaus tawm lub zog rau ASTM A387 Qib 5 Chav Kawm 2 feem ntau yog 30 ksi. Qhov no ua kom ntseeg tau tias cov khoom tuaj yeem tiv taus qhov tseem ceeb sab hauv thiab kev thauj khoom yam tsis muaj kev deformation ntau dhau nyob rau hauv siab - qhov chaw ua haujlwm kub.
Kev kho cua sov dab tsi yuav tsum tau ua rau ASTM A387 Qib 5 Chav Kawm 2?
ASTM A387 Qib 5 Chav Kawm 2 feem ntau yog muab rau hauv cov xwm txheej zoo li qub thiab tempered. Normalizing refines lub grain qauv, thaum tempering txo hardness thiab txhim kho toughness, xyuas kom meej cov khoom ua tau raws li qhov yuav tsum tau txhua yam khoom rau lub siab hlab ntsha daim ntaub ntawv.
Qhov kub siab tshaj plaws ntawm ASTM A387 Qib 5 Chav Kawm 2 tuaj yeem ua haujlwm li cas?
ASTM A387 Qib 5 Chav Kawm 2 feem ntau yog siv rau hauv daim ntawv thov txog li 900℃F. Nws cov chromium-molybdenum muaj pes tsawg leeg muab kev nkag siab zoo thiab kev ruaj ntseg ntawm cov txheej txheem siab ntawm qhov kub siab, ua rau nws tsim nyog rau refinery thiab petrochemical khoom.
ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 yog dav siv hauv cov hlab ntsha siab, boilers, thiab cov khoom siv hluav taws xob hauv cov roj, roj, thiab kev lag luam petrochemical. Nws kuj pom muaj nyob rau hauv cov khoom siv refinery xws li reactors thiab piping systems uas ua haujlwm ntawm nruab nrab mus rau qhov kub thiab txias.
Dab tsi yog qhov txawv ntawm ASTM A387 Qib 5 Chav Kawm 2 thiab ASTM A36 steel?
ASTM A387 Qib 5 Chav Kawm 2 yog ib qho tshwj xeeb alloy hlau rau siab -kub siab cov hlab ntsha, thaum ASTM A36 yog ib qho dav - lub hom phiaj carbon steel. Qib 5 Chav Kawm 2 muaj qhov ua kom sov zoo dua thiab muaj zog nkag, qhov A36 yog siv rau hauv cov qauv siv ntawm qhov kub thiab txias.
ASTM A387 Qib 5 Chav Kawm 2 piv rau ASTM A537 Chav Kawm 1 li cas?
ASTM A387 Qib 5 Chav Kawm 2 yog chromium-molybdenum alloy steel tsim rau siab- kev pabcuam kub, thaum ASTM A537 Class 1 yog quenched thiab tempered carbon steel rau cov hlab ntsha siab. Qib 5 Chav Kawm 2 muab kev nkag siab zoo dua, thaum Qib 537 Chav Kawm 1 muaj lub zog siab ntawm qhov kub qis.