Dab tsi yog qhov sib npaug ntawm A537 steel?
A537 Chav Kawm 3(los yog ASTM A537/ASME SA537 Chav Kawm 3) yog hais txog lub tshav kub- kho, quenched, thiab tempered carbon-manganese-silicon steel phaj tsim rau fusion-welded siab hlab ntsha thiab boilers, muab lub zog siab dua (Yield 380 MPa / mins) cov kev pab cuam qhov kub thiab txias rau chav kawm 55 k. nyob rau hauv cov roj, roj, thiab tshuaj industries. Nws tau paub txog kev sib npaug ntawm lub zog thiab txhim kho cov khoom cuam tshuam, nrog rau cov kev xav tau tshwj xeeb tempering (tsis tsawg dua 1150℃F / 620℃).
Lub tswvyim ntawm "sib npaug" rau A537 steel nyob ntawm cov txheej txheem tshwj xeeb, daim ntawv thov, thiab cov khoom xav tau. Tsis muaj ib qho kev hloov pauv thoob ntiaj teb 1: 1, tab sis muaj ntau cov ntaub ntawv zoo sib xws. Qhov sib npaug feem ntau suav nrog hauv peb lub ntsiab lus:
1. Direct Hla-Txoj kev sib npaug
Cov no yog cov ntaub ntawv zoo ib yam lossis yuav luag zoo ib yam raws li cov qauv sib txawv.
ASME: SA537 yog qhov ncaj qha ASME Boiler thiab Pressure Vessel Code txais yuav ntawm ASTM A537. Cov specifications yog technically zoo tib yam.
International (Similar Composition/Performance):
TS EN 10028-4: P355GH (normalized) muaj kev siv zoo sib xws thiab lub zog nruab nrab tab sis tsis quenched & tempered. Qhov kev sib tw ze dua tuaj yeem yog P460NH lossis P500QL / QL1 (quenched & tempered), txawm tias chemistry txawv.
JIS G3115: SPV450 yog lub siab lub nkoj steel uas zoo ib yam li qis -kub toughness lub hom phiaj.
Hom Lub Npe: Nws feem ntau hu ua "carbon-manganese- silicon steel, cua sov- kho rau cov hlab ntsha siab."
2. Kev ua tau zoo / Daim Ntawv Thov -Txoj kev sib npaug (Cov Kev Xaiv Zoo Tshaj Plaws)
Cov hlau no raug xaiv rau cov kev siv zoo sib xws (cov hlab ntsha siab, qis- qhov kub thiab txias) thiab muaj qhov sib piv lub zog- sib xyaw ua ke, tab sis lawv cov chemistry lossis cov specs tseeb txawv.
| Yog tias koj xav tau qhov no los ntawm A537 ... | Xav txog cov kev xaiv no ... |
|---|---|
| Lub zog siab & Zoo qis -Tsub Toughness (Zoo li Chav Kawm 2/3) | ASTM A516 Gr . 70 (normalized, zoo heev toughness, me ntsis qis zog) ASTM A612 / A724 (rau siab - kev siv siab) ASTM A737 Gr. B&C (zoo li Q&T, qis-kev pabcuam kub) TS EN 10028-4: P460NH / P500QL |
| Zoo heev Cryogenic Toughness | ASTM A553 Hom I (8% Ni steel) lossis Hom II (9% Ni steel) - Rau qis qis dua (< -196°C). ASTM A645 (5% Ni hlau) - Rau nruab nrab temps. |
| Siab zog, Zoo sib xws Formability | ASTM A678 Gr. A (Q&T carbon steel) - Rau cov qauv siv, tsis siv lub nkoj nruj nruj. |
3. Cov lus ceeb toom tseem ceeb ntawm "Kev Sib Tw"
Tsis txhob hloov raws li lub rooj xwb. "Sib npaug" tsis txhais hais tias hloov pauv tau yam tsis muaj kev tshuaj xyuas los ntawm tus kws ua haujlwm tsim nyog.
Cov khoom tseem ceeb kom phim: Yam tsawg kawg nkaus tawm los / tensile lub zog, Charpy cuam tshuam toughness ntawm qhov tsim kub, thiab weldability.
Txoj Cai Tswjfwm yog Txoj Cai: Qhov kev xaiv zaum kawg yuav tsum tau txais kev pom zoo los ntawm cov qauv tsim qauv (xws li ASME BPVC Tshooj VIII, EN 13445) thiab tus kws ua haujlwm lub luag haujlwm.
Kev kho cua sov yog qhov tseem ceeb: Cov txheej txheem Q&T ntawm A537 Chav Kawm 2/3 yog qhov tseem ceeb. Hloov nrog cov hlau tsis zoo (xws li A516) yuav tsum muaj kev ntsuam xyuas tag nrho.
Summary Table of Common References
Rau kev yuav khoom lossis tsim kev hloov pauv, ib txwm muab cov lus qhia tag nrho:
"ASTM A537, Chav Kawm [1/2/3], nrog rau kev ntsuam xyuas ntawm [piv txwv li, -50℃F / -46 degree]." Qhov no tso cai rau cov mills los yog cov chaw muag khoom los tawm tswv yim qhov tseeb hauv zos pom zoo cov khoom sib npaug uas ua tau raws li txhua yam khoom siv thiab tshuaj lom neeg.
1.A537 Chav Kawm 3 yog dab tsi?
A537 Chav Kawm 3 yog qhov siab - lub zog, cua sov- kho cov pa roj carbon -manganese- silicon steel phaj tsim rau welded siab hlab ntsha, muab qhov zoo tshaj qhov tsis zoo thiab lub zog siab dua li Chav Kawm 1 thiab Chav Kawm 2 rau cov tuab tuab.
2.Dab tsi yog cov khoom siv tshuab ntawm A537 Chav Kawm 3?
Rau cov phaj siab txog li 2.5 ntiv tes tuab, A537 Chav Kawm 3 feem ntau muaj qhov tsawg kawg nkaus tawm lub zog ntawm 80 ksi (550 MPa) thiab lub zog tensile yam tsawg kawg nkaus ntawm 95 ksi (655 MPa), nrog rau qhov yuav tsum tau muaj zog toughness feem ntau nruj dua Chav Kawm 2.
3.Dab tsi yog kev kho cua sov rau A537 Class 3?
A537 Chav Kawm 3 yog nkag rau hauv qhov kub thiab txias, zoo ib yam li Chav Kawm 2, tab sis tuaj yeem koom nrog cov txheej txheem nruj dua kom ua tiav cov khoom muaj zog.
4.Dab tsi yog qhov txawv ntawm A537 Class 2 thiab Class 3?
Qhov sib txawv tseem ceeb yog nyob rau hauv cov kev xav tau toughness thiab qee zaum lub zog rau cov phaj tuab. Chav Kawm 3 tau teev tseg rau kev txhim kho qis- qhov kub thiab txias cuam tshuam, feem ntau nrog kev nruj dua Charpy V-Notch qhov yuav tsum tau ua, ua rau nws tsim nyog rau kev siv qhov kub thiab txias dua.
5.Dab tsi yog Charpy cuam tshuam yuav tsum tau rau A537 Class 3?
Txawm hais tias qhov tseem ceeb tshwj xeeb yog nyob ntawm qhov tuab thiab kev txiav txim siab, Chav Kawm 3 feem ntau xav tau Charpy V-Kev ntsuas ntsuas ntsuas ntawm qhov ntsuas kub qis (piv txwv li, -75℃F/-60 degree) nrog ntau dua absorbed zog minima (piv txwv li, 40-50 ft-lbs) piv rau Chav Kawm 2.
6.Qhov twg yog A537 Chav Kawm 3 nquag siv?
Nws yog siv nyob rau hauv ib qho tseem ceeb tsawg- daim ntawv thov kub xws li cov roj liquefied tso tsheb hlau luam, offshore platforms nyob rau hauv arctic ib puag ncig, thiab cov hlab ntsha siab yuav raug rau cov kev pab cuam txias heev.
7.Yog A537 Class 3 weldable?
Yog lawm, tab sis nws yuav tsum tau ua cov txheej txheem vuam nruj zoo ib yam li Chav Kawm 2, suav nrog kev siv qis - hydrogen electrodes, tswj preheat, thiab feem ntau tshaj tawm -weld cua sov kho kom muaj zog hauv tshav kub- thaj tsam cuam tshuam.
8.Dab tsi yog qhov siab tshaj plaws thickness muaj rau A537 Class 3?
Tus qauv npog daim hlau txog li 6 ntiv tes (150 hli), tab sis cov khoom siv kho tshuab, tshwj xeeb tshaj yog tawv, yog tuab- nyob ntawm thiab yuav tsum tau kuaj xyuas rau ASTM A537 cov ntxhuav rau Chav Kawm 3.
9.Yog A537 Class 3 haum rau kev pabcuam cryogenic?
Yog lawm, nws cov kev tsim nyog ua kom muaj zog ua kom nws haum rau cryogenic thiab sub- xoom daim ntawv thov, feem ntau nqes mus rau -75℃F (-60 degree) lossis qis dua, nyob ntawm qhov kev xav tau ntawm cov kev ntsuas cuam tshuam.
10.A537 Class 3 piv rau ASTM A553 Hom I li cas?
Ob leeg yog quenched thiab tempered steels rau qis - qhov kev pab kub. A553 Hom I yog 9% npib tsib xee alloy hlau rau qhov kub tsis tshua muaj siab, thaum A537 Class 3 yog cov pa roj carbon-manganese-silicon steel nrog kev txhim kho toughness rau nruab nrab qhov kub thiab txias, muab tus nqi ntau dua - kev daws teeb meem zoo rau qee qhov tshwj xeeb.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
