ASTM A588Yog lub siab-zog qes-alloy qauv steel nto koob rau nws cov khoom siv hluav taws xob txhim kho. Nws yog dav siv rau cov qauv qauv xws li cov ces kaum, raws, ci, thiab ntau yam hlau phaj thiab cov kab hlau.
Qhov kev qhia tshwj xeeb yog feem ntau npaj rau Welded Txuas hniav, kev siv sab nraum zoov uas ceeb toom durability, thiab txo kev saib xyuas yog qhov tseem ceeb.
Ua tsaug rau nws cov tshuaj sib xyaw ua ke, ASTM A588 ua ib qho kev tiv thaiv patin {1} Zoo li qhov kev pabcuam lub neej yam tsis muaj kev xav tau ntawm daim duab.
Cov Cuab Yeej Siv Cov Neeg Kho Tshuab ntawm ASTM A588 Hlau Phaj
ASTM A588 hlau muaj lub zog zoo thiab tawv thoob plaws ntawm cov tuab tuab:
| Phaj Thickness | Yield zog (min) | Tensile lub zog (min) |
|---|---|---|
| Tsawg dua los yog sib npaug rau 4 hauv (tsawg dua lossis sib npaug rau 100 hli) | 50,000 PSI (340 MPA) | 70,000 psi (480 MPA) |
| 4-5 hauv (102-127 hli) | 46,000 psi (320 mpa) | 67,000 psi (460 MPa) |
| 5-8 nyob rau hauv (127-203 mm) | 42,000 psi (290 mpa) | 63,000 psi (430 MPa) |
Yuav Tsum Tau Tsawg:
Min 18% hauv 8 "
Min 21% hauv 2 "
ASTM A588 Steel Phaj Qhov Coob Ntau
Thickness: 6 hli - 200 hli
Dav: 1500 hli - 4050 hli
Ntev: 3000 mm - 15000 mm
(Kev cai thiab cov kev pab txiav muaj.)
Tshuaj lom neeg muaj pes tsawg leeg
Qib A / B / C Ib Lub Rooj
| Lub ntsiab | Qib A | Qib B | Qib C |
|---|---|---|---|
| Pa roj carbon | 0.19 max | 0.20 max | 0.17 Max |
| Tus kws dai txiv manganese | 0.80–1.25 | 0.75–1.35 | 0.50–1.20 |
| Phosphorus | 0.04 max | 0.04 max | 0.04 max |
| Leej mos | 0.05 max | 0.05 max | 0.05 max |
| Silicon | 0.30–0.65 | 0.15–0.50 | 0.25–0.50 |
| Tus menyuam yaus | 0.40 max | 0.50 max | 0.40 max |
| Yeebsab | 0.40–0.65 | 0.40–0.70 | 0.40–0.70 |
| Molybdenum | – | – | 0.10 max |
| Tooj liab | 0.25–0.40 | 0.20–0.40 | 0.30–0.50 |
| Thee lub hau | 0.02–0.10 | 0.01–0.10 | – |
| Columbium (NB) | – | – | 0.005–0.05 |
ASTM A588 steel yog engineered rau sab nraum zoov qauv yuav tsum tau ntev-} lub sij hawm kev ua tau zoo thiab zoo dua cua tshuab corrosion. Vim nws tshwj xeeb muaj pes tsawg leeg muaj pes tsawg leeg, A588 tuaj yeem ua tiav 2-5 zaug ntxiv kev pabcuam lub neej tshaj li cov pa roj carbon hlau feem ntau. Hauv qab no yog cov ntawv thov tseem ceeb txhawb nqa los ntawm cov ntaub ntawv engineering:
1. Choj cov hlau thiab cov choj hluav taws xob
Nyob rau hauv ib txwm muaj nyob deb nroog lossis kev lag luam ib puag ncig, A588 steel corrodes 0.03-0-0- mm / xyoo rau cov qauv hlau, muab rau
4 × kev pab cuam ntev rau lub neej rau choj Cheebtsam.
Ntau cov choj North American Ua nrog A588 xyoo 1960-70s tseem ua haujlwm rau hnub no, xav tau kev saib xyuas tsawg.
A588 qhov tsawg kawg 50 ksi (345 mpa) lub zog ua lub zog tso cai rau 10-15% txo cov phaj tuab, txo cov qauv teeb meem thiab tus nqi.
2. Gusset daim phiaj thiab cov qauv sib txuas
Lub zog siab -} {{1} Qhov hnyav} qhov hnyav piv rau cov khoom txuag khoom ntawm 8-12% hauv kev sib txuas daim hlau.
Kev kuaj tsiaj Qhab Qoob Qhia tias A588 hlau lub patina txheej ruaj khov tom qab kis tau tom qab raug zog tsis txaus ntseeg ntau dua cov pa roj carbon steel hauv kev siv sab nraum zoov.
3. Cov tsheb thauj khoom thiab cov khoom thauj mus los
A588 txhim kho cov kev pabcuam tsheb ciav hlau lub neej txij li 15-20 xyoos txog 25-40 xyoo nyob ntawm kev nyab xeeb.
Corrosion -}} Kev Txij Nkawm uas tuaj yeem raug txo los ntawm 35-45%, tshwj xeeb tshaj yog rau cov tsheb tawv, thiab qhib - sab saum toj freight wagons.
Cov kev txhim kho atmospheric corrosion corrosionance pab txo cov zaus ntau zaus- Feem ntau tsis muaj kev tha xim patina.
4. Hloov pauv cov yees thiab Telecom Towers
Huab cua hlau tshuab qhia 20-30% qis dua lub neej- Tus nqi them vim tias lawv tsis tas yuav tsis muaj xim tshaj30+ xyoo.
A588 lub tensile tensile ntawm 70 ksi (480 MPa) ua kom cov qauv ruaj khov nyob rau hauv {}} kev txav chaw.
Kev tshawb fawb teb qhia tias corrosion nkag ntawm tsuas yog 1/3 uas ntawm cov me me hlau nyob hauv ntug hiav txwv thiab siab {} noo noo cheeb tsam.
5. Sab Nraud Cov Tsev, Ntim, thiab Cov Khoom Siv
ASTM A588 steel ua ib qho ruaj khov muaj xeb patina tsis pub dhau 6-24 lub hlis, nyob ntawm cov dej nag thiab av noo.
Lub patina ua raws li kev tiv thaiv kev tiv thaiv, txo qis ntxiv corrosion los ntawm 80-90% piv nrog tsis kho cov roj carbon steel.
Kev pabcuam lub neej tuaj yeem tshaj 40+} xyoo nrog tsis muaj kev saib xyuas.
6. Architectural Facades & Huab Cua Hlau Cladding
Weathering hlau façades tswj cov xim ruaj khov thiab cov qauv kev ncaj ncees, txo cov nqi rov qab los ntawm 100% (tsis muaj xim yuav tsum tau).
Hauv kev siv lub tsev, A588 cov hlau nplaum qhia cov nqi nruab nrab ntawm 0.02-0.05 mm / xyoo, tso cai50+ ntev durability.
Kws tsim tsa cov ntawv A588 vim tias nws tau hloov pauv Patina, uas tob zuj zus los ntawm txiv kab ntxwv {}} xim av rau xim av tsaus nti hauv 12-36 lub hlis.
7. Toj roob hauv pes cov qauv, duab puab & cov qauv zoo nkauj
Sab nraum zoov daim duab tau ua los ntawm A588 feem ntau yuav tsum tau saib xyuas thiab muaj cov nyiaj ua neej ntawm 50-80 xyoos.
Tus hlau cov khoom khoov thiab vuam cov khoom siv kom loj - toj roob hauv pes cov qauv uas tuab cov qauv tuab tsawg.
Muaj ntau cov neeg tsim qauv zoo nkauj xaiv A588 vim tias Patina cov xim nce mus rau 80% ua kom ruaj khov nyob rau hauv 1-2 xyoos, ua kom muaj kev sib cais ntev dua.
