ASTM A516 Qib 70steel yog cov qauv kev lag luam rau cov khoom siv uas ua haujlwm hauv qhov nruab nrab lossis qis qis. Tsim los rau lub zog siab thiab txhim khu kev qha ua haujlwm nyob rau hauv qhov kub thiab txias, A516 Qib 70 yog nruab nrab carbon alloy nrog cov ntsiab lus ntawm manganese, phosphorus, sulfur, thiab silicon.
Dav siv los muab cov roj, roj, thiab cov tuam txhab petrochemical, A516-70 kuj tseem ua haujlwm tsis tu ncua rau cov txuas hniav, cov tsev, tsheb thiab cov tsheb thauj khoom, tsheb ciav hlau, cov thawv ntim khoom, cov thawv ntim khoom, cov cuab yeej siv, cov tubing, cov qauv teeb pom kev zoo, cov ncej sib kis, thiab lwm yam. Hlau USA nqa A516-70 steel daim hlau nyob rau hauv tag nrho cov qauv ntau thiab tsawg thiab thicknesses.
Mechanical Properties ntawm ASTM A516 Qib 70
| Kev piav qhia | Qib 70 |
|---|---|
| Tensile zog (ksi) | 70-90 |
| Tensile zog (MPa) | 485-620 |
| Yield zog (ksi) | 38 |
| Yield zog (MPa) | 260 |
| Elongation hauv 200mm (min) (%) | 17 |
| Elongation hauv 50mm (min) (%) | 21 |
| Thickness (max) (hli) | 205 |
Tshuaj muaj pes tsawg leeg ntawm ASTM A516 Qib 70
| Cov pa roj carbon (C) | % |
| 12.5mm los yog tsawg dua 12.5 - 50 hli 50 - 100 hli 100 - 200 hli >200 hli |
0.27 0.28 0.30 0.31 0.31 |
Manganese (Mn) |
% |
| 12.5mm los yog tsawg dua • Kev Ntsuas Kub: • Kev Ntsuam Xyuas Khoom Muag: Tshaj 12.5mm • Kev Ntsuas Kub: • Kev Ntsuam Xyuas Khoom Muag: |
0.85-1.20 0.79-1.30 0.85-1.20 0.79-1.30 |
Phosphorus (P) |
% |
| (max) | 0.035 |
Sulfur (S) |
% |
| (max) | 0.035 |
Silicon (Si) |
% |
| • Kev Ntsuas Kub: • Kev Ntsuam Xyuas Khoom Muag: |
0.15-0.40 0.13-0.45 |
ASTM A516 Qib 70 Fabrication Process Flow
1. Khoom Muag Khoom & Kev Tshuaj Xyuas
Kev Tshawb Fawb: Paub meej cov khoom ua raws li ASTM A516 / A20 lossis ASME SA516 / SA20 tus qauv.
Kev Ntsuas: Ua cov kev xeem ntxiv yog tias xav tau, xws li Ultrasonic Examination (UT) rau ASTM A435/A578 thiab Charpy V-Notch (CVN) cuam tshuam kev kuaj.
2. Kev npaj nto
Ntxuav: Tshem tawm cov nplai zeb, xeb, roj, thiab cov av noo siv cov txheej txheem xws li kev tua blasting lossis sandblasting kom ntseeg tau siab -welds zoo.
Ntug Kev Npaj: Beveling thiab sib tsoo yog ua los tsim cov qauv sib koom ua ke (piv txwv li, V-grooves) rau vuam.
3. Txiav & sib sau
Txoj Kev Txiav: Siv Oxy- roj (nplaim), Plasma, lossis Laser txiav nyob ntawm cov phaj tuab thiab qhov yuav tsum tau ua.
Cold/Hot forming: Phaj dov lossis nias kom ua tiav lub nkoj xav tau lossis cov khoom zoo. Rau qhov hnyav deformation, kev kho cua sov nruab nrab yuav tsim nyog.
4. Kev kho cua sov (Pre-fabrication)
Normalizing: Yuav tsum tau ua rau cov phaj siab tshaj 1.5 ntiv tes (40 mm) hauv thickness los ua kom zoo dua cov qauv nplej.
Tsis Siv Neeg: Kub rau 900℃- 950℃(1650℃F - 1750℃F) ua raws li kev tswj cua txias.
5. Vuam (sib koom)
Weldability: Siab weldability siv SMAW, GMAW, GTAW, lossis SAW txheej txheem.
Preheating: Pom zoo rau cov phaj siab tshaj 1.5 nti (38 mm) tuab, feem ntau preheated rau 95℃- 200℃(200℃F - 400℃F) los tiv thaiv hydrogen cracking.
Filler Hlau: Siv qis- hydrogen consumables xws li E7018 los yog sib npaug kom phim lub hauv paus hlau lub zog tensile.
6. Tshaj tawm -Weld Heat Treatment (PWHT)
Kev Ruaj Ntseg: Qhov tseem ceeb rau kev tshem tawm cov kev ntxhov siab nyob hauv qhov hnyav - cov hlab ntsha.
Tsis Siv Neeg: Kub rau 595℃- 675℃(1100℃F - 1250℃F), tuav rau kwv yees li 1 teev ib nti ntawm thickness.
7. Kev Tswj Xyuas Zoo & Kev Xeem Kawg
Nondestructive Testing (NDT): Muaj xws li Radiographic Testing (RT), Sib Nqus Particle Testing (MT), lossis Dye Penetrant Testing (PT) los xyuas qhov kev ncaj ncees.
Kev Ntsuas Hydrostatic: Kev ntsuas siab kawg ntawm lub nkoj ua tiav kom muaj kev nyab xeeb thiab xau- ua haujlwm pub dawb raws li kev pabcuam.
Daim ntawv pov thawj zaum kawg: Issue Mill Test Reports (MTR) thiab cov ntaub ntawv ua raws.
daim ntawv thov
1. Kev lag luam roj & roj
Cov Nkoj Siab:Separators, absorbers, reactors, thiab scrubbers.
Cia Tank:Loj - lub tank loj rau LPG, LNG, thiab roj av.
Kev Pab Cuam:HIC- cov ntawv xeem siv rau cov cuab yeej tuav H2S (kua roj) ib puag ncig.
2. Kev tsim hluav taws xob
Boiler Systems:Steam drums, headers, thiab siab -steam piping.
Kub Hloov:Heat exchanger shells, condensers, and feed-dej heaters.
3. Tsheb thauj mus los & Logistics
Tank Tsheb:Cov tsheb ciav hlau tshwj xeeb thiab cov tsheb thauj mus los rau kev thauj cov pa roj cua / tshuaj lom neeg.
Spherical Tanks:Loj -scale "Horton Spheres" rau hauv nroog lossis kev lag luam roj cia.
4. General Industrial Fabrication
Heavy Machinery:Crane booms, excavator Cheebtsam, thiab industrial xovxwm ncej.
Dej Infrastructure:Siab -siab penstocks thiab rooj vag rau hydroelectric nroj tsuag.
5. Tsawg-Kev Pabcuam Kub
Txias -Climate Equipment:Cov paib ib txwm siv rau cov khoom siv hauv Arctic los yog qhov chaw txias heev vim muaj kev sib tw zoo heev.
Yog tias koj xav paub ntxiv txog (A516 Qib 70)GNEE cov khoom, koj tuaj yeem xa email rau beam@gneesteelgroup.com. Peb zoo siab tshaj los pab koj.
Kev kho cua sov dab tsi yog ASTM A516 GR 70 raug rau?
Nws feem ntau yog muab rau hauv normalized, quenched - thiab - tempered, los yog raws li - dov mob. Normalization txhim khu kev sib xws thiab toughness.
ASTM A516 GR 70 yog dab tsi?
Tsis muaj tus qauv ruaj khov, tab sis raug Brinell hardness yog 130-180 HB. Welded zones yuav tsum tau kuaj xyuas kom tsis txhob muaj qhov hnyav dhau.
ASTM A516 GR 70 puas tuaj yeem siv rau siab -cov hlab ntsha siab?
Yog, rau nruab nrab -siab siab. Nws lub zog thiab tawv ua tau raws li ASME BPVC qhov yuav tsum tau ua, ua rau nws zoo tagnrho rau cov hlab ntsha siab hauv ntau qhov kev lag luam.
Dab tsi yog qhov ceev ntawm ASTM A516 GR 70?
Nws qhov ceev yog kwv yees li 7.85 g / cm³ (0.284 lb / in³), tib yam li cov qauv carbon steels, yooj yim rau kev xam qhov hnyav rau cov khoom tsim.
Yuav tshuaj xyuas ASTM A516 GR 70 daim hlau li cas?
Kev tshuaj xyuas muaj xws li tshuaj ntsuam xyuas, kev ntsuas tshuab (tensile, khoov), kuaj pom, kuaj ultrasonic, thiab kev ntsuam xyuas cuam tshuam yog tias xav tau.
Puas yog ASTM A516 GR 70 sib nqus?
Yog, nws yog ferritic carbon hlau, li no sib nqus. Cov cuab yeej no pab tsis yog - kev sim ua kom puas xws li kev soj ntsuam cov khoom sib nqus.
Dab tsi yog qhov yuav tsum tau elongation ntawm ASTM A516 GR 70?
Qhov tsawg kawg nkaus elongation yog 20% rau cov phaj siab dua lossis sib npaug ntawm 12.7 hli (0.5 hauv) tuab, ua kom cov ductility tiv thaiv deformation hauv kev ntxhov siab.
ASTM A516 GR 70 puas tuaj yeem txias- tsim?
Yog lawm, nws muaj qhov txias txias -formability. Txoj kev khoov kom zoo thiab nrawm yog xav tau; post-kev kho cua sov yuav tsum tau rau cov phaj tuab.
Yuav tsum tau ntawv pov thawj dab tsi rau ASTM A516 GR 70?
ASME BPVC Seem II daim ntawv pov thawj yog muaj. Mill test reports (MTR) lees paub cov tshuaj muaj pes tsawg leeg thiab cov khoom siv tshuab yog qhov yuav tsum tau ua.