Dab tsi yog qhov txawv ntawm A514 Qib F thiab SA514 Qib F?
SA514 Qib Fyog ASME Boiler thiab Pressure Vessel Code (BPVC) tsim rau 100 ksi yam tsawg kawg nkaus lub zog, quenched thiab tempered alloy steel phaj. Nws yog tus lej - tsim nyog version ntawm ASTM A514 Qib F, tau txais kev hais lus rau hauv ASME cov qauv nrog kev lees paub zoo thiab cov ntawv pov thawj ntxiv. Cov khoom no yog qhov yuav tsum tau ua rau siab- khaws cov khoom hauv boilers, cov hlab ntsha siab, thiab kev tsim hluav taws xob nuclear qhov twg yuav tsum muaj ASME Code Stamp (U, U2, N), kom ntseeg tau tias nws ua tau raws li cov qauv kev nyab xeeb thiab kev taug qab rau siab - cov ntawv thov siab.
A514 Qib Fyog lub siab -lub zog, quenched thiab tempered alloy structural steel txhais los ntawm ASTM International specification. Nws yog tus cwj pwm los ntawm qhov tsawg kawg nkaus tawm lub zog ntawm 100 ksi (690 MPa) thiab zoo heev qis-kub toughness, ua tiav los ntawm boron- ua kom cov chemistry. Qib no yog cov txheej txheem kev lag luam khoom siv hauv kev xav tau, tsis yog- cov ntawv siv siab xws li cov cuab yeej siv hnyav (excavator booms, crane Cheebtsam), mining machinery, thiab cov tswv cuab tseem ceeb uas muaj zog tshaj plaws - mus rau - hnyav piv thiab tsis kam mus rau dynamic loading yog qhov tseem ceeb.
Cov lus teb luv luv yog: Tsis muaj cov khoom siv lossis cov tshuab sib txawv ntawm lawv. Lawv yog chemically thiab mechanically zoo tib yam.
Qhov txawv tsuas yog nyob rau hauv lub koom haum tswj hwm thiab kev cai lij choj ntawm daim ntawv thov.
| Yam | ASTM A514 Qib F | ASME SA-514 Qib F |
|---|---|---|
| Pawg Thawj Tswj Hwm | ASTM International (yav tas los American Society for Testing and Materials). Ib lub koom haum txhim kho tus qauv. | ASME (American Society of Mechanical Engineers). Lub koom haum kev tshaj lij thiab kev cai-sau lub cev. |
| Hom ntaub ntawv | Cov khoom specification. Nws txhais cov hlau nws tus kheej - nws cov chemistry, mechanical properties, and test method. | ASME Code- pom zoo cov ntaub ntawv tshwj xeeb. Nws yog ASTM A514 specification uas tau txais yuav, lo lus - rau - lo lus, rau hauv ASME Boiler thiab Pressure Vessel Code (BPVC). |
| Lub Hom Phiaj Tseem Ceeb & Kev Txiav Txim Siab | Rau kev siv cov qauv siv dav dav (lub tsev, txuas hniav, cov khoom siv mining). Kev tswj hwm los ntawm cov lej zoo li AISC. | Rau siab- khaws cov khoom nyob rau hauv boilers, siab hlab ntsha, thiab nuclear tsim. Kev tswj hwm los ntawm ASME BPVC. |
| Ntawv pov thawj & Stamp | Cov khoom yog muab nrog ASTM Mill Test Report. | Cov khoom yuav tsum tau muab nrog ASME Certificate of Compliance (feem ntau yog "Daim Ntawv Qhia") thiab tsim nyog rau cov khoom uas yuav nqa tau ASME Code Stamp (xws li U, U2, N, NPT). |
| Qhov tseem ceeb ntawm kev siv | Koj siv tsis tau cov ntaub ntawv pov thawj nkaus xwb rau ASTM A514 los tsim ASME Code-stamped siab hlab yam tsis muaj kev siv tau ntxiv. | Koj tuaj yeem siv cov ntaub ntawv pov thawj rau SA-514 hauv qhov tsis yog- daim ntawv thov kev tsim nyog (nws tsis tsim nyog), txawm tias nws yuav kim dua. |
Kev sib raug zoo: "SA" vs "A"
Qhov "S" ua ntej hauv ASME cov khoom siv tshwj xeeb (SA-514, SA-36, SA-516) qhia tias ASTM specification ("A") tau raug tshuaj xyuas, tau txais, thiab tswj hwm los ntawm ASME rau kev siv raws li nws cov cai. Cov ntsiab lus technical yog zoo ib yam, tab sis cov kev tswj hwm thiab kev ruaj ntseg zoo rau covcov khoom sivfeem ntau nruj dua raws li ASME raws tu qauv.
Yuav xaiv li cas hauv kev xyaum
Rau tus choj, lub tsev ncej, lossis excavator boom: Qhia ASTM A514 Qib F.
Rau lub nkoj siab, boiler nruas, lossis nuclear tivthaiv: Cov qauv tsim yuav xav tau ASME SA-514 Qib F.
Cov ntsiab lus: Xav txog ASTM A514 Qib F raws li cov khoom siv dav dav txhais, thiab ASME SA-514 Qib F raws li cov cai tsim nyog, pedigree version ntawm tib cov khoom siv rau cov khoom siv siab. Cov hlau phaj ntawm lub zeb yog tib yam; cov ntaub ntawv, ntawv pov thawj, thiab kev tso cai siv yog txawv.
1. Dab tsi yog qhov yuav tsum tau ua kom muaj zog toughness rau A514 Qib F?
A514 Qib F feem ntau yuav tsum muaj qhov tsawg kawg nkaus Charpy V-notch cuam tshuam lub zog ntawm 54 Joules (40 ft- lbs) ntawm -40℃(-40℃F), kom ntseeg tau cov pob txha zoo heev hauv qhov chaw txias thiab cov ntawv thov kev thauj khoom.
2. A514 Qib F daim hlau tuaj yeem txiav txim siab npaum li cas?
Nws yog feem ntau tsim nyob rau hauv thicknesses txog li 100 hli (4 nti) thaum tuav tag nrho los ntawm - thickness zog, tab sis qee lub mills tuaj yeem muab cov phaj tuab nrog cov khoom kho kom zoo.
3. Dab tsi muab cov hlau uas pom zoo rau vuam A514 Qib F?
Vuam yuav tsum muaj kev sib tw siab - zog, qis-hydrogen electrodes xws li E11018 lossis E12018 kev faib tawm, nrog nruj ua raws li preheat (300-400℃F) thiab interpass kub tswj los tiv thaiv hydrogen cracking.
4. Puas yog A514 Qib F xav tau tom qab-weld heat treatment (PWHT)?
Yog lawm, PWHT tau pom zoo rau feem ntau cov khoom siv welded los txo cov kev ntxhov siab uas seem thiab rov ua kom tawv nqaij hauv tshav kub- thaj tsam cuam tshuam, tshwj xeeb tshaj yog rau cov ntu tuab thiab cov pob qij txha nruj heev.
5. A514 Qib F puas tuaj yeem yog nplaim taws- txiav yam tsis muaj kev ceev faj tshwj xeeb?
Nplaim txiav yuav tsum tau preheating rau 200-300℃F ua ntej txiav los tiv thaiv hardening thiab micro-cracking raws ntug txiav, tshwj xeeb tshaj yog rau thicknesses saum 2 ntiv tes.
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.
