ASTM A612 Cov Lus Qhia Tshwj Xeebyog ib tug specification npog tua carbon-manganese-silicon steel daim hlau npaj rau fabrication ntawm welded siab hlab ntsha ua hauj lwm nyob rau hauv nruab nrab thiab qis kub kev pab cuam tej yam kev mob. Cov hlau yog tsim nrog tag nrho deoxidized (tua tuag) xyaum ua kom ntseeg tau zoo nyob rau hauv zoo thiab txhim kho toughness kev ua tau zoo.
ASTM A612 steel daim hlau ib txwm muab nyob rau hauv raws li -rolled mob, tab sis kuj yuav raug txiav txim nyob rau hauv normalized, kev nyuaj siab-relived, los yog normalized thiab kev ntxhov siab-relived tej yam kev mob, nyob ntawm seb cov kev pab cuam yuav tsum tau thiab tsim cov cai. Txhua daim hlau yuav tsum ua raws li cov tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab tam uas tau teev tseg hauv tus qauv.
Khoom Muag Khoom
ASTM A612 siab nkoj steel daim hlau tuaj yeem muab tau raws li hauv qab no:
Raws li -rolled (AR)
Normalized (N)
Kev ntxhov siab (SR)
Normalized + Stress relieved (N + SR)
Qhov kev xaiv xa khoom yuav tsum tau teev nyob rau lub sijhawm ntawm kev txiav txim raws li kev ua haujlwm kub, siab, thiab cov lej siv lub nkoj siab.
Phaj Thickness txwv
Raws li ASTM A612 specification:
Maximum tso cai phaj thickness:
1 nti (25mm)
Cov cuab yeej siv tshuab yuav tsum raug txheeb xyuas los ntawm cov qauv ntsuas tensile coj raws li tus qauv.
Chemical Composition (Kev Ntsuas Kub, %)
| Lub ntsiab | Kev xav tau |
|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.18 |
| Silicon (Si) | Tsawg dua los yog sib npaug li 0.50 |
| Manganese (Mn) | 0.90 – 1.70 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.030 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.030 |
| Chromium (Cr) | Tsawg dua lossis sib npaug li 0.30 |
| Copper (Cu) | Tsawg dua lossis sib npaug li 0.30 |
| Molybdenum (hli) | Tsawg dua los yog sib npaug li 0.08 |
| Nitrogen (N) | Tsawg dua los yog sib npaug rau 0.020 |
| Nickel (Ni) | Tsawg dua los yog sib npaug li 0.50 |
| Niobium (Nb) | Tsawg dua los yog sib npaug li 0.05 |
| Titanium (Ti) | Tsawg dua lossis sib npaug li 0.03 |
| Vanadium (V) | Tsawg dua lossis sib npaug li 0.10 |
| Nb + Ti + V | Tsawg dua lossis sib npaug li 0.12 |
Cov kev tswj xyuas cov ntsiab lus thiab cov microalloy txwv tsis pub muaj kev txhim kho lub zog, weldability, thiab notch toughness.
Mechanical Properties
Tensile Test Requirements
| Khoom | Kev xav tau |
|---|---|
| Yield zog | 295 - 355 MPa (yam tsawg kawg, nyob ntawm chav kawm) |
| Tensile zog | 450-630 MPa |
| Elongation | Ntau dua lossis sib npaug li 21% lossis 22% (nyob ntawm qhov tuab thiab hom qauv) |
Cov cuab yeej siv tshuab tau txiav txim siab siv cov qauv ntsuas nruj raws li ASTM cov qauv ntsuas.
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm
Siab Vessel Suitability
ASTM A612 steel daim hlau muab lub zog ruaj khov thiab ductility haum rau siab - khaws cov cuab yeej ua haujlwm nyob rau hauv nruab nrab thiab qis kub.
Txhim kho Toughness Performance
Cov pa roj carbon-manganese-silicon steel tsim thiab tua steel xyaum txhim khu kev tiv thaiv kom tawg tawg, tshwj xeeb tshaj yog nyob rau hauv cov pob qij txha.
Weldability zoo
Nrog kev tswj cov pa roj carbon sib npaug thiab qib qis impurity, ASTM A612 steel daim hlau tuaj yeem nkag tau yooj yim siv cov txheej txheem vuam, muab cov txheej txheem vuam tsim nyog.
Uniform Phaj Zoo
Kev tswj cov tshuaj muaj pes tsawg leeg nruj thiab cov txheej txheem dov kom ntseeg tau tias kev ua haujlwm zoo ib yam ntawm cov phaj saum npoo thiab tuab.
Muaj Dimensions
| Yam khoom | Ntau yam |
|---|---|
| Thickness | 4 hli - 25 hli (tus qauv ASTM A612 txwv) |
| Dav | 1,000mm - 4,000mm |
| Ntev | 4,000mm-12,000mm |
| Ntug mob | Zeb ntug / Trimmed ntug |
| Surface condition | Raws li - dov / Tua blasted (yeem) |
Tej kev siv
ASTM A612 siab nkoj steel daim hlau yog dav siv nyob rau hauv siab- khaws cov cuab yeej ua hauj lwm nyob rau hauv nruab nrab siab thiab nruab nrab mus rau qhov kub thiab txias tej yam kev mob, qhov twg txhim khu kev qha lub zog thiab torque toughness yuav tsum tau.
Welded Siab Vessels
ASTM A612 feem ntau yog siv rau hauv cov hlab ntsha siab uas tsim los tiv thaiv sab hauv thiab kev ntxhov siab.
Cov qauv tsim siab: 1.6 - 10 MPa
Qhov kub thiab txias: -20℃rau +350 degree
Muaj feem xyuam rau cov hlab ntsha: separators, reactors, absorbers, heat exchangers
Tsim kev txiav txim siab: zoo ntswj toughness thiab ruaj khov weld sib koom ua haujlwm
Boilers thiab Siab -Tswj Cheeb Tsam
A612 steel phaj yog tsim rau boiler plhaub thiab siab- khaws cov khoom ua haujlwm ntawm qhov kub nruab nrab.
Kev khiav hauj lwm kub: txog li 350 degree
Hom phaj thickness: 6-25 mm
Load hom: sab hauv siab ua ke nrog thermal stress
Qhov zoo: sib npaug lub zog thiab ductility rau kev ua haujlwm ntev -
Chemical thiab Petrochemical Processing Equipment
ASTM A612 daim hlau yog dav siv nyob rau hauv tshuaj reactors, kab, thiab ua cov hlab ntsha siv nyob rau hauv tshuaj thiab petrochemical nroj tsuag.
Kev pabcuam ib puag ncig: siab + cyclic load
Kev tshaj tawm: hydrocarbons, tshuaj solvents, txheej txheem gases
Tsim kom pom tseeb: tiv thaiv kev tawg tawg hauv cov pob qij txha welded
Hom fabrication txoj kev: tag nrho welded lug
Cia Tank rau Pressurized Gases thiab kua
ASTM A612 yog siv rau cov tso tsheb hlau luam siab uas muaj cov roj compressed thiab cov kua dej siab.
Kev ua haujlwm siab: 1.0 - 8.0 MPa
Kev khiav hauj lwm kub: -20℃rau +300 degree
Tank hom: LPG tanks, industrial gas nkoj, txheej txheem cia tank
Qhov tseem ceeb yuav tsum tau: ruaj khov tensile zog thiab elongation kom tsis txhob tawg propagation
Kev tsim hluav taws xob thiab khoom siv hluav taws xob
Nyob rau hauv lub zog thiab lub zog sector, ASTM A612 steel daim hlau yog siv nyob rau hauv siab-cov kabmob thiab cov qauv kev txhawb nqa.
Daim ntawv thov: cov hlab ntsha siab, pab boilers, lub zog cia
Cov kev pab cuam: nruab nrab siab thiab kub hloov pauv
Tsim cov lej: ASME Boiler thiab Pressure Vessel Code ua raws
Cov txiaj ntsig: kev kwv yees tus cwj pwm kev siv tshuab hauv kev ua haujlwm tas mus li
| Daim ntawv thov cheeb tsam | Siab Ntau | Qhov kub thiab txias | Cov Khoom Siv Tseem Ceeb |
|---|---|---|---|
| Lub nkoj siab | 1.6-10 MPa | -20℃rau +350 degree | Lub zog + tsis muaj zog toughness |
| Boilers | Mus txog rau nruab nrab siab | Tsawg dua lossis sib npaug li 350 degree | Thermal stability |
| Cov Khoom Siv Tshuaj | Hloov pauv | -20℃rau +300 degree | Weld kev ntseeg tau |
| Cia Tank | 1.0-8.0MPa | -20℃rau +300 degree | Ductility & kev nyab xeeb |
| Cov khoom siv fais fab | Nruab nrab | Hloov pauv | Ntev - lub sij hawm ruaj khov |
Qhov tseeb tso siab, kub, thiab tuab yuav tsum tau txiav txim siab raws li cov qauv tsim thiab cov lej siv, xws li ASME Boiler thiab Pressure Vessel Code, tsis yog cov khoom siv ib leeg.
Q1: Hom hlau twg yog ASTM A612?
A:
ASTM A612 yog cov roj carbon-manganese-silicon siab lub nkoj zoo (PVQ) steel phaj. Nws yog tsim tshwj xeeb rau welded siab hlab ntsha ua haujlwm ntawm qhov nruab nrab thiab qis qis, qhov twg yuav tsum muaj lub zog zoo thiab tsis muaj zog.
Piv nrog rau cov qauv hlau dav dav, A612 muab qhov tseem ceeb dua rau kev ua haujlwm siab, kev sib koom ua ke kev ntseeg tau, thiab tawg toughness.
Q2: Dab tsi yog qhov txawv ntawm ASTM A612 thiab ASTM A516?
A:
Ob leeg A612 thiab A516 yog cov hlab ntsha siab, tab sis lawv tau npaj rau kev pabcuam sib txawv.
| Yam khoom | ASTM A612 Cov Lus Qhia Tshwj Xeeb | ASTM A516 Cov Lus Qhia Tshwj Xeeb |
|---|---|---|
| Hom hlau | C-Mn-Si PVQ steel | Zoo-cov nplej PVQ steel |
| Thickness txwv | Tsawg dua los yog sib npaug li 25 mm | Txog li ~ 200 hli |
| Kub tsom | Nruab nrab & qis kub | Nruab nrab & qis kub |
| Kev tswj kom nruj | Notch toughness tseem ceeb | Charpy cuam tshuam hais txog |
| Hom kev siv | Nruab nrab - cov hlab ntsha siab | Boilers & tuab cov hlab ntsha |
Cov ntsiab lus:
A612 feem ntau xaiv rau nruab nrab tuab, nruab nrab cov hlab ntsha siab
A516 yog qhov zoo dua thaum cov phaj tuab dua lossis yuav tsum tau kuaj xyuas qhov cuam tshuam
Q3: ASTM A612 piv nrog EN P275 / P355 series li cas?
A:
| Yam khoom | ASTM A612 Cov Lus Qhia Tshwj Xeeb | EN P275 / P355 |
|---|---|---|
| Standard System | ASTM / ASME Cov | TS EN 10028 |
| Yield zog | 295-355 MPa | 275/355 MPa |
| Thickness txwv | Tsawg dua los yog sib npaug li 25 mm | Dav thickness ntau |
| Kev Xa Khoom | AR / N / SR | Feem ntau normalized |
| Daim ntawv thov Focus | Cov hlab ntsha siab | Siab hlab ntsha & boilers |
ASTM A612 feem ntau yog siv hauv ASME- cov hlab ntsha siab, thaum qib P275 / P355 yog nyiam nyob hauv European- cov khoom siv txheem.
Q4: Dab tsi yog qhov txawv ntawm A612 Chav Kawm 1, Chav Kawm 2, thiab Chav Kawm 3?
A:
Cov chav kawm peb feem ntau sib txawv hauv qib siab thiab qhov tsis sib haum xeeb.
| Chav kawm | Min Yield zog | Qib toughness | Hom kev xaiv |
|---|---|---|---|
| Chav Kawm 1 | Ntau dua lossis sib npaug li 345 MPa | Zoo | General pressure hlab ntsha |
| Chav kawm 2 | Ntau dua lossis sib npaug li 390 MPa | Txhim kho | Kev tsim qauv siab dua |
| Chav kawm 3 | Ntau dua lossis sib npaug li 450 MPa | Siab tshaj | High kev nyab xeeb margin nkoj |
Kev xaiv cov chav kawm siab dua tso cai rau cov phab ntsa nyias nyias lossis tsim siab dua, raug rau kev suav lej.
Q5: Puas yog ASTM A612 haum rau qis -kev pabcuam kub?
A:
ASTM A612 yog haum rau nruab nrab thiab qis kub kev pab cuam, feem ntau qis mus rau ib ncig ntawm -20 degree, nyob ntawm seb yuav tsum tau tsim thiab kuaj tej yam kev mob.
Rau qhov ntsuas kub qis dua (qis dua -20 degree) lossis qhov yuav tsum tau muaj kev cuam tshuam rau lub zog, qib xws li A516 nrog Charpy qhov kev ntsuam xyuas cuam tshuam yuav tsim nyog dua.
| Lwm cov hlau phaj los ntawm GNEE | ||||
| 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 |
