A537 Chav Kawm 3 yog dab tsi?
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℃).
Cov yam ntxwv tseem ceeb ntawm A537 Chav Kawm 3:
1. Kev kho cua sov:Zoo li Chav Kawm 2, nws tau muab rau hauv qhov kub thiab txias (Q&T). Cov txheej txheem no muab nws zoo -grained microstructure uas muab kev pom zoo ua ke ntawm lub zog siab thiab kev cuam tshuam zoo heev.
Mechanical Properties (Hom rau daim hlau Tsawg dua lossis sib npaug li 2.5 hauv / 63.5 mm):
2. Yam tsawg kawg yield zog:80 ksi (550 MPa)
Yam tsawg kawg tensile zog: 95 ksi (655 MPa)
Lub zog qhov tseem ceeb txo qis rau cov phaj tuab, raws li tau hais tseg hauv ASTM tus qauv cov lus.
3.Primary Distinguishing Feature – Enhanced Toughness:
Qhov sib txawv tseem ceeb ntawm Chav Kawm 3 thiab Chav Kawm 2 yog nyob rau hauv nws qhov kev nruj nruj (kev cuam tshuam) cov cai.
Thaum Chav Kawm 2 feem ntau tau teev tseg rau kev pabcuam nqis mus rau -50℃F (-46 degree), Chav Kawm 3 yog tsim los rau kev thov ntau dua qhov kub thiab txias, feem ntau xav tau Charpy V-Notch kuaj ntawm -75℃F (-60 degree) lossis qis dua, nrog ntau dua qhov tsawg kawg nkaus absorbed zog nqi. Qhov no yuav tsum tau qhia meej meej los ntawm tus neeg yuav khoom.
4.Kev siv ntau:
Qhov tseem ceeb tsawg -kub thiab cryogenic siab hlab ntsha
Lub tank cia rau cov roj liquefied (piv txwv li, LNG, ethylene)
Offshore qauv nyob rau hauv ib puag ncig Arctic
Heavy-cov haujlwm mining thiab cov khoom siv tsim kho ua haujlwm hauv huab cua huab cua
Yuav Ua Li Cas Xaiv & Qhia A537 Chav Kawm 3:
Chav kawm 3 tsis yog ib qho -size- haum- tag nrho cov khoom. Txhawm rau siv nws kom raug:
Daim ntawv xaj yuav tsum qhia meej meej txog qhov xav tau qhov ntsuas kub qis tshaj qhov kev pabcuam.
Nws yuav tsum qhia qhov sib thooj Charpy ntsuas kub thiab qhov tsawg kawg nkaus nqus lub zog (ib ASME BPVC Tshooj VIII lossis lwm cov cai tswj hwm).
Vuam cov txheej txheem yuav tsum nruj me ntsis tsim nyog nrog rau kev ntsuam xyuas los xyuas kom meej qhov weld cheeb tsam sib phim lub hauv paus hlau lub toughness.
ASTM boiler qib A537 chav kawm 3 siab nkoj steel phaj tshuaj muaj pes tsawg leeg:
| Qib | C | Mn | P | S | Si | Cu | Ni | Cr | Mo |
| A537 chav 3 | 0.24 | 0.92-1.72 | 0.035 | 0.035 | 0.13-0.55 | 0.38 | 0.28 | 0.29 | 0.09 |
Cov yam ntxwv ntawm A537 chav kawm 3 steel phaj ntawm qhov kub thiab txias:
| Qib | Thickness (hli) | Tsawg-yield (Mpa) | Tensile (MPa) | Elongation (%) |
| A537 chav 3 | 8mm-65 hli | Min 380 Mpa | 550-690 Mpa | 22% |
| 66mm-100 hli | Min 345 Mpa | 515-655 Mpa | 22% | |
| 101mm-150mm | Min 275 Mpa | 485-620 Mpa | 20% |
Lwm lub npe lag luam ntawm A537 chav kawm 3 phaj:
A537 daim
A537 hlau
A537 chav kawm 3 steel
ASTM A537 hlau
A537 carbon hlau
A537 steel phaj
ASTM A537 phaj
A537 qib phaj
Cov qib A537 hauv qab no kuj muaj:
ASTM A537 / ASME SA537 chav kawm 1 /A537CL1
ASTM A537 / ASME SA537 chav kawm 2 /A537 CL2
1.A537 Chav Kawm 3 yog dab tsi?
Teb: A537 Chav Kawm 3 yog qhov siab - lub zog, cua sov- kho carbon-manganese- silicon steel phaj tsim los rau cov hlab ntsha siab, muab cov kev sib tw zoo tshaj plaws 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?
Teb: 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?
Teb: A537 Chav Kawm 3 yog muab rau hauv qhov kub thiab txias, zoo ib yam li Chav Kawm 2, tab sis tej zaum yuav 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?
Teb: Qhov sib txawv tseem ceeb nyob hauv qhov yuav tsum tau muaj zog 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?
Teb: Txawm hais tias qhov tseem ceeb nyob ntawm qhov tuab thiab kev txiav txim siab, Chav Kawm 3 feem ntau xav tau Charpy V-Kev ntsuas 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?
Teb: Nws yog siv nyob rau hauv qhov 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?
Teb: 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 tom qab-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?
Teb: Tus qauv npog cov phaj siab txog 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?
Teb: Yog, nws cov kev tsim nyog toughness txhim khu kev qha ua rau nws tsim nyog rau cryogenic thiab sub-zero daim ntawv thov, feem ntau nqes mus rau -75℃F (-60 degree) los yog qis dua, nyob ntawm seb qhov yuav tsum tau muaj kev ntsuam xyuas.
10.A537 Class 3 piv rau ASTM A553 Hom I li cas?
Teb: 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.
