ASTM A612 Cov Lus Qhia Tshwj Xeebhais txog kev tua cov pa roj carbon-manganese-silicon steel tau teev tseg raws li ASTM International cov qauv, tsim tshwj xeeb rau cov hlab ntsha siab uas ua haujlwm ntawm qhov nruab nrab thiab qis.
PVQstands rau Pressure Vessel Quality. Thaum cov khoom no tau muab tso rau hauv ASME Boiler thiab Pressure Vessel Code, nws qib sib npaug yog ASME SA612, nrog cov kev xav tau zoo ib yam rau cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab ntawm ob tus qauv.
Tiv tauj peb tam sim no rau cov lus qhia tseeb ntawm ASTM A612.
ASTM A612 Steel Phaj & Natural Gas Storage Tanks
Qhov zoo ntawm ASTM A612 Steel rau Natural Gas Storage Tanks:
1.Thickness txo tau txais txiaj ntsig los ntawm lub zog siab.
Piv nrog rau cov pa siab lub nkoj steels xws li ASTM A516 Gr.70, ASTM A612 xa ib ncig ntawm 30% siab dua yield zog. Qhov no tso cai rau thinner tank phab ntsa tsim nyob rau hauv zoo tib yam tsim siab, zoo heev txiav cov khoom siv thiab vuam ua hauj lwm kom paub txog cov khoom siv hnyav thiab optimized nqi. Qhov kom zoo dua yog qhov tshwj xeeb tshaj yog rau cov loj - cov pa roj carbon monoxide cia tank.
2.Tsawg kawg-Tsub Toughness.
Cov khoom siv roj ntsha hauv lub tank tuaj yeem raug rau qhov kub thiab txias thaum lub sijhawm ua haujlwm thiab txhaws. Featuring ib tug nplua -grained tua steel qauv thiab tswj tshuaj muaj pes tsawg leeg, ASTM A612 tuav zoo heev cuam tshuam toughness ntawm kub li tsawg li -45℃thiab zoo tiv thaiv nkig puas. Cov cuab yeej no yog qhov tseem ceeb rau cov roj tso tsheb hlau luam uas xa mus rau hauv thaj chaw txias lossis ua haujlwm hauv cov kev pabcuam cryogenic.
3.Excellent Weldability.
Natural gas cia tso tsheb hlau luam yog feem ntau loj welded qauv, thiab weld zoo ncaj qha txiav txim siab cov cuab yeej kev nyab xeeb. ASTM A612 muaj cov pa roj carbon sib npaug (CE) Tsawg dua lossis sib npaug ntawm 0.48%, thiab vuam tuaj yeem ua yam tsis muaj preheating rau phaj thicknesses txog 150 hli.
ASTM A612 / SA612 steel phajyog dav siv nyob rau hauv ntau yam khoom siv nyob rau hauv lub natural gas industrial saw, xws li:
- Spherical gas tuav thiab cia tank rau natural gas.
- Liquefied Petroleum Gas (LPG) cia tanks thiab nqa.
- Fractionators, separators thiab scrubbers.
- Cov khoom siv roj av thiab cov khoom siv roj ntsha.
Chemical Composition Elements ntawm ASTM A612 Steel Phaj:
Cov pa roj carbon (C): Tsawg dua lossis sib npaug li 0.29% - Tswj cov pa roj carbon sib npaug los xyuas kom muaj kev sib tw;
Manganese (Mn): 0.92% -1.62% - Txhim kho hardenability thiab refines grain loj;
Silicon (Si): 0.13% - 0.55% - Txhim kho deoxidation;
Phosphorus (P), Sulfur (S): Tsawg dua lossis sib npaug ntawm 0.025% txhua - Txo qhov kev pheej hmoo ntawm kev sib cais thiab txias brittleness;
Molybdenum (Mo): Tsawg dua los yog sib npaug li 0.09% - Txhim kho siab - kub lub zog thiab nkag siab;
| Cov pa roj carbon, max: aw |
Manganese A | Phosphorus, maxB |
Sulfur, maxB | Silicon | Cov pa roj carbon, max :c |
Nickel, max :c |
Chromium, max :c |
Molybdenum, max :c |
Vanadium, max :c |
| Kev sib xyaw | Kev sib xyaw | ||||||||
| 0.29 | 0.92-1.62 | 0.025 | 0.025 | 0.13-0.55 | 0.38 | 0.28 | 0.29 | 0.09 | 0.09 |
Lus Cim A: Rau txhua qhov kev txo qis ntawm 0.01 feem pua ntawm cov pa roj carbon ntau tshaj plaws, qhov nce ntawm 0.06 feem pua ntawm cov manganese saum toj no qhov siab tshaj plaws tau tso cai rau qhov siab tshaj plaws ntawm 1.65% rau kev ntsuas kub (1.70% rau kev tshuaj xyuas khoom).
Faj seeb B: Siv rau ob qho tib si cua sov thiab cov khoom siv tshuaj ntsuam xyuas.
Lus Cim C: Thaum kev txheeb xyuas pom tau tias tus nqi ntawm cov khoom yog 0.02% lossis qis dua, tus nqi yuav raug tshaj tawm raws li Tsawg dua lossis sib npaug rau 0.02%.
Mechanical Properties ntawm ASTM A612 Steel Phaj
| Thickness | Tensile zog Ksi [MPa] |
Yield zog, min A Ksi [MPa] |
Elongation hauv 8 nti [200 mm], min, %B |
Elongation hauv 2 nti [50 mm], min, %B |
| 0.5 hauv [12.5 mm] thiab Hauv qab | 83-105 [570-725] | 50 [345] | 16 | 22 |
| Tshaj 0.5 nti mus rau 1 nti [Tshaj 12.5 txog 25 hli] |
81-101 [560-695] | 50 [345] | 16 | 22 |
Kev txiav txim siab los ntawm 0.2% offset txoj kev lossis 0.5% txuas ntxiv -hauv- txoj kev thauj khoom.
B Saib Specification A20/A20M rau kev hloov kho elongation.
ASTM A612 Kev Tsim Khoom Txheej Txheem
1. Ultra-High-Purity Steel Smelting Technology
Molten hlau pretreatment: Desulfurization ntawm KR txoj kev kom tsawg dua los yog sib npaug rau 0.003%;
Hloov dynamic tswj: Cov ntsiab lus carbon kawg tswj ntawm 0.04% -0.08%, oxygen ua haujlwm tsawg dua lossis sib npaug li 25 ppm;
RH nqus degassing: Cov ntsiab lus hydrogen Tsawg dua lossis sib npaug li 1.5 ppm, cov ntsiab lus nitrogen tsawg dua lossis sib npaug li 60 ppm;
Calcium Treatment Txheej Txheem: Hloov ntawm MnS suav nrog rau hauv spheroidal CaS nrog qhov loj me me dua lossis sib npaug li 15 μm.
2. Kub-Cov Txheej Txheem Hloov Kho (TMCP)
Ob -Theem Rolling: Rough dov kub 1150-1200 degree, tiav dov kub 820-870℃;
Laminar txias: Txias ntawm tus nqi ntawm 10-15℃/ s tom qab dov mus rau 550 degree, ua kom zoo -grained ferrite + pearlite microstructure;
Normalizing kev kho mob: Tuav ntawm 900℃± 20℃rau 1.5 teev ib 25 hli, ua tiav cov nplej loj ntawm ASTM Qib 7-8.
3. Tsim thiab Vuam Tshuab
JCOE sib sau: Ellipticity Tsawg dua lossis sib npaug li 0.8%, haum rau cov kav dej uas muaj txoj kab uas hla Ntau dua lossis sib npaug li 508 hli;
Multi-wire submerged arc vuam: Siv plaub-hlau tandem vuam, ua kom vuam ceev mus rau 1.8 m / min;
Ncej -weld kev ntxhov siab nyem: Cov cua kub hauv zos induction rau 580 ± 15 degree, residual stress Tsawg dua lossis sib npaug li 120 MPa.
Kev kho cua sov
ASTM A612 steel tuaj yeem muab tau rau hauv ntau qhov kev xa khoom, suav nrog raws li- dov, normalized, kev ntxhov siab-relived, lossis normalized ntxiv rau kev ntxhov siab-relieved. Tom qab-weld heat treatment (PWHT) yuav tsum tau ua los yog tshem tawm raws li ASME Code cov cai thiab cov phab ntsa phab ntsa thickness.
Thickness txwv
Qhov siab tshaj plaws thickness teev nyob rau hauv tus qauv no yog 25 hli.
ASTM A612 vs. A516 Gr.70: Cov khoom siv sib piv
Thaum xaiv cov khoom siv rau lub tank ntim roj, ASTM A612 thiab ASTM A516 Qib 70 yog ob qib uas tau teev tseg. Qhov sib txawv tseem ceeb ntawm ob cov ntaub ntawv tau piav qhia hauv qab no:
| Cov khoom sib piv | ASTM A612 Cov Lus Qhia Tshwj Xeeb | ASTM A516 Gr.70 |
|---|---|---|
| Yield zog | 345 MPa rau | Kwv yees li . 260 MPa |
| Tsim Qhov Zoo | Thinner phab ntsa tsim, hnyav dua | Kev siv dav rau cov ntu tuab |
| Tsawg-Tsub Toughness | Zoo heev (txog -45 degree) | Zoo (txog -30 degree) |
| Daim ntawv thov Scenario | Nruab nrab thickness, siab siab, tsis tshua muaj kev pab cuam | Cov ntu tuab, kev pabcuam dav dav dav dav |
Rau cov khoom siv roj av uas muaj kev tsim siab siab thiab phaj tuab hauv 25 hli, ASTM A612 muab cov nqi zoo dua. Rau cov tso tsheb hlau luam loj uas xav tau cov phaj tuab, ASTM A516 Qib 70 yog qhov kev xaiv zoo dua.
Vim li cas thiaj xaiv GNEE ua koj tus khub
GNEE GROUP Steel muab boiler & siab nkoj steel daim hlau xws li A204 B, A515 Gr70, A537 Cl1, SA387 Gr11 Cl1, P265GH, S537 Cl2, P355Q, P275N, P355NL, P390NL thiab Qes Tiv tauj peb dawb rau lwm hom phaj, peb pab neeg yuav teb tag nrho koj cov lus nug tam sim.
- Tag Nrho Kev Ua Raws CaiUa tau raws li ASTM A612 / A612M tus qauv, suav nrog Class1/2/3. Tag nrho cov hlau tua nrog cov muaj pes tsawg leeg; muaj nyob rau hauv kub dov, normalized, QT tus me nyuam xeev.
- Kev soj ntsuam nruj nrujUa kom tiav tensile, qis - qhov kub thiab txias thiab UT xeem. Muab MTC official; txhawb nqa thib peb-kev soj ntsuam tog zoo li SGS/BV. Traceable cua sov tooj rau ASME & PED ntawv pov thawj.
- Spot Tshuag & Custom processingCov khoom lag luam nplua nuj rau kev xa khoom sai. Muab kev txiav, beveling, dov thiab lwm yam - nres machining kom txuag koj cov nqi ua.
- Zoo heev Low-Tsub Ua HaujlwmHigh notch toughness, nyab xeeb rau -40℃~ -60℃cryogenic cov hlab ntsha siab. Zoo weldability yam tsis muaj preheating ntxiv rau nyias daim hlau.
- Cov khoom siv ruaj khov & Cov nqi sib twKev koom tes ncaj qha nrog cov ntawv pov thawj mills, cov khoom ruaj khov thiab lub Hoobkas - tus nqi ncaj qha rau kev txiav txim ntau; kev txiav txim me me tau txais.
- Professional Export ServiceXyoo ntawm steel export kev. Pab neeg ua haujlwm pab xaiv qib thiab cov txheej txheem daws teeb meem. Ua kom tiav shipping & kev lis kev cai cov ntaub ntawv.
- Txhim khu kev ntseeg tom qab -Kev Pabcuam MuagTag nrho - xaj kev nce mus txog qhov ua tau zoo, cov nqe lus them nqi hloov pauv thiab ntev - cov lus qhia kev qhia rau kev tsim khoom.
ASTM A612 / A612M Cov Khoom Muag Khoom Muag Khoom
| Thickness (hli) | Txheem dav (mm) | Txheem Length (mm) | Yam tsawg kawg nkaus Tonnage |
|---|---|---|---|
| 8 | 1500 / 1800 | 6000 / 8000 | Ntau dua lossis sib npaug li 50 MT |
| 10 | 1500 / 1800 | 6000 / 8000 | Ntau dua lossis sib npaug li 80 MT |
| 12 | 1500 / 2000 | 6000 / 9000 | Ntau dua lossis sib npaug li 100 MT |
| 14 | 1500 / 2000 | 6000 / 9000 | Ntau dua lossis sib npaug li 60 MT |
| 16 | 1500 / 2000 | 6000 / 10000 | Ntau dua lossis sib npaug li 120 MT |
| 20 | 1800 / 2200 | 6000 / 10000 | Ntau dua lossis sib npaug li 150 MT |
| 25 | 1800 / 2200 | 6000 / 10000 | Ntau dua lossis sib npaug li 80 MT |
| 30~50 | 2000 / 2500 | 6000 / 12000 | Tshuag muaj kom paub tseeb tias ib qho kev txiav txim |
ASTM A612 / A612M Dimensional kam rau ua
| Nominal Thickness Range | Thickness kam rau ua (Dav Tsawg dua lossis sib npaug li 1500mm) | Thickness kam rau ua (Dav 1500 ~ 2500mm) | Thickness Tolerance (Width >2500mm) | Sib Nqus Tolerance | Sib Nqus Ntev Tolerance | Flatness kam rau ua | Camber kam rau ua |
|---|---|---|---|---|---|---|---|
| 6 ~ 10 | -0.3 / +0.7 | -0.3 / +0.8 | -0.4 / +0.9 | ±3 | ±5 | Tsawg dua los yog sib npaug li 3mm / m | Tsawg dua los yog sib npaug li 2 hli / m |
| 10 ~ 20 | -0.3 / +0.8 | -0.4 / +0.9 | -0.4 / +1.0 | ±5 | ±5 | Tsawg dua los yog sib npaug li 3mm / m | Tsawg dua los yog sib npaug li 2 hli / m |
| 20 ~ 30 | -0.4 / +0.9 | -0.4 / +1.0 | -0.5 / +1.1 | ±5 | ±10 | Tsawg dua los yog sib npaug li 3mm / m | Tsawg dua los yog sib npaug li 2 hli / m |
| 30 ~ 50 | -0.4 / +1.0 | -0.5 / +1.1 | -0.5 / +1.2 | ±8 | ±10 | Tsawg dua los yog sib npaug li 3mm / m | Tsawg dua los yog sib npaug li 2 hli / m |
| 50 ~ 100 | -0.5 / +1.1 | -0.5 / +1.2 | -0.6 / +1.3 | ±8 | ±15 | Tsawg dua los yog sib npaug li 3mm / m | Tsawg dua los yog sib npaug li 2 hli / m |
| 100 ~ 150 | -0.6 / +1.3 | -0.6 / +1.4 | -0.7 / +1.5 | ±8 | ±15 | Tsawg dua los yog sib npaug li 3mm / m | Tsawg dua los yog sib npaug li 2 hli / m |
Tiv tauj peb tam sim no rau cov lus qhia tseeb ntawm ASTM A612.
1. Qhov txawv ntawm ASTM A612 thiab ASME SA612 yog dab tsi?
Tsis muaj qhov txawv txav. SA612 yog tus tsim nyob rau hauv ASME specification, thiab nws cov ntsiab lus technical yog zoo tib yam rau ASTM A612, muaj feem xyuam rau kev tsim cov hlab ntsha siab rau ASME ntawv pov thawj.
2. Qhov siab tshaj plaws thickness ntawm A612 steel phaj yog dab tsi?
Tus qauv qhia qhov siab tshaj plaws thickness ntawm 1 nti (25mm). Qee tus neeg muag khoom tuaj yeem tsim cov qauv tuab (xws li 50-80mm), tab sis qhov no yuav tsum tau sib tham thiab lees paub los ntawm ob tus neeg muag khoom thiab tus neeg yuav khoom kom ua tau raws li qhov yuav tsum tau ua.
3. A612 puas tuaj yeem siv rau hauv qhov chaw qis - qhov kub thiab txias?
Yog lawm. ASTM A612 yog tsim los rau nruab nrab thiab qis- kev pabcuam kub. Tus qauv ua tau raws li qhov yuav tsum tau muaj txog li -30 degree, thiab cov tswv yim engineering tau txheeb xyuas nws mus txog -45 degree.
4.Puas yog ASTM A612 steel phaj zoo rau vuam hauv siab hlab ntsha fabrication?
Yog lawm, ASTM A612 steel phaj muaj cov ntsiab lus carbon tsawg thiab tswj muaj pes tsawg leeg, muab cov weldability zoo, txawm tias preheating yuav tsum tau rau cov phaj tuab.
5.Yog SA612 thiab A612 Steel Phaj yog tib yam khoom? Dab tsi yog qhov txawv ntawm Core?
Lawv yog tib hom hlau phaj. ASTM A612 yog cov qauv khoom siv, thaum ASME SA612 yog qhov tsim los tom qab ASTM A612 tau muab tso rau hauv ASME Boiler & Pressure Vessel Code, tshwj xeeb rau kev tsim cov khoom siv siab -cov kabmob.
