ASTM A276 vs A479 vs A484: Round Bar Standards rau txawv kev pab cuam

Round barCov ntaub ntawv kev yuav khoom feem ntau hais txog ASTM A276, ASTM A479, thiab ASTM A484 hauv tib kab khoom, uas ua rau cov neeg yuav khoom xav tias lawv yog peb txoj kev sib hloov ntawm kev piav qhia cov khoom qub. Lawv tsis yog. Kev nkag siab tias txhua tus qauv tswj hwm qhov twg - thiab peb qhov cuam tshuam li cas rau ib leeg - tiv thaiv cov ntawv pov thawj tsis sib haum, tsis lees paub cov ntawv xeem mills, thiab them nqi qeeb thaum tau txais kev tshuaj xyuas.

Dab tsi yog qhov txawv ntawm ASTM A276, A479, thiab A484?

Peb cov qauv no ua haujlwm ntawm ntau theem ntawm cov kev qhia tshwj xeeb hierarchy, tsis yog cov kev xaiv sib tw rau tib lub bar.A276 thiab A479 yog cov khoom specifications - txhua tus txhais hais tias ib puag ncig bar yuav tsum yog rau cov kev pab cuam. A484 yog tus qauv dav dav - yuav tsum muaj tus qauv: nws muab cov kev sim sib koom, kev ua siab ntev, thiab cov ntawv pov thawj cov cai uas A276, A479, thiab cuaj lwm ASTM bar thiab forging specifications siv tsis yog rov ua dua.

ASTM A484 / A484M hais tias nwsnpog cov kev cai dav dav uas yuav tsum tau siv rau wrought stainless hlau tuav, cov duab, forgings, thiab billets los yog lwm yam semi{0}}cov ntaub ntawv tiav, tshwj tsis yog hlau, forging, thiab teev A276 thiab A479 ntawm kaum ib yam khoom tshwj xeeb uas nws tau hais.

Qhov no hierarchy tseem ceeb ntawm theem kev yuav khoom. Daim ntawv pov thawj zeb uas tsuas yog siv A484 tsis tiav - A484 tsis muaj cov khoom lag luam uas nws tuaj yeem lees paub. Daim ntawv pov thawj siv tau ib txwm sau npe tus tswv tsev tshwj xeeb (A276 lossis A479) nrog rau A484 cov kev cai dav dav.

Yam twg koj yuav tsum xaiv rau General Machining thiab Structural Round Bar?

Xaiv ASTM A276 thaum twg lub round bar tsis muaj siab - tuav haujlwm.A276 yog qhov dav tshaj plaws ntawm peb yam khoom tshwj xeeb, npog kub - tiav thiab txias - tiav puag ncig, square, thiab hexagonal bar, nrog rau kub - dov lossis extruded duab, hla ntau yam ntawm cov qib stainless.

A276 yog tus txheej txheem buyers mus txog rau thaum lub bar yuav ua ib tug machined ncej, ib tug fastener, ib tug bracket, valve trim, los yog lwm yam khoom uas muaj zog structural thiab corrosion kuj teeb meem tab sis ib feem yuav tsis nws tus kheej muaj cov kua los yog roj. Nws teev cov tshuaj lom neeg muaj pes tsawg leeg, cov cuab yeej cuab tam yam tsawg kawg nkaus, thiab qhov ntev ntev haum rau kev tsim khoom dav dav.

Thaum twg ASTM A479 Thov Hloov A276?

Thov ASTM A479 thaum twg lub puag ncig yuav raug machined los yog forged rau hauv ib feem uas khaws cia siab - boiler qhov chaw, siab hlab ntsha internals, valve lub cev, thiab twj tso kua mis Cheebtsam.A479 npog tib tsev neeg ntawm cov qib stainless hlau raws li A276, tab sis nws cov peev txheej yog nqaim tshwj xeeb rau bar thiab cov duab npaj rau boiler thiab siab hlab ntsha.

Qhov sib txawv ntawm qhov ua tau tshwm sim hauv cov ntaub ntawv thiab kev txheeb xyuas. Cov cuab yeej siv siab xws li ASME Tshooj VIII feem ntau hu tawm qhov sib npaug ASME (SA-479) ncaj qha, thiab A479 xaj yuav ntau dua yuav tsum tau kuaj tag nrho cov tshuab, kev tshaj tawm zeb nruj dua, thiab cua sov-ntau qhov kev sib raug zoo tsim nyog rau siab- thaj tsam thaj tsam. Cov khoom siv A276 qee zaum tuaj yeem hloov pauv tsuas yog tias nws tus kheej rov ua dua - ntawv pov thawj kom ua tau raws li A479 cov kev cai - qhov rov qab hloov pauv tsis siv neeg.

Lub luag hauj lwm ua ASTM A484 Ua Si, thiab Vim Li Cas Nws Tsis Nyob Ib Leeg?

A484 muaj nyob rau khaws A276, A479, thiab cuaj lwm qhov bar thiab forging specifications zoo ib yam, yog li nws tsis tau txiav txim los ntawm nws tus kheej.Nws txhais tau hais tias cov khoom vaj khoom tsev muaj peev xwm muab tau rau hauv, chemistry - cov cai pov thawj rau kev tshuaj xyuas cov khoom, thiab cov sij hawm ntev ntev uas A276 thiab A479 ob leeg tso siab rau es tsis txhob rov ua dua.

A484 tso cai rau cov hlau tsis muaj steel rau hauv ib qho ntawm plaub yam xwm txheej: kub- ua haujlwm; kub-ua hauj lwm thiab annealed; kub-ua haujlwm, ua haujlwm, thiab txias- ua haujlwm; los yog kub-ua hauj lwm, annealed, thiab cua sov- kho. Nws kuj yuav tsum muaj cov qib austenitic thiab austenitic-ferritic (duplex) cov qhab nia rau hauv cov kev daws teeb meem-annealed mob, nrog rau qhov ntsuas kub, quenching, thiab cua txias.

Kev tsis sib haum xeeb - ntawm - txoj cai yuav tsum tau muaj

Yog tias qhov kev xav tau hauv A276 lossis A479 tsis sib haum nrog qhov yuav tsum tau muaj hauv A484, cov khoom specification (A276 lossis A479) tswj hwm.

Yog tias daim ntawv xaj xaj tsis sib haum nrog cov khoom tshwj xeeb lossis A484, qhov yuav tsum tau nruj dua tswj hwm - daim ntawv xaj yuav tsis tuaj yeem zam lossis tsis muaj zog rau qhov yuav tsum tau xeem.

Tau qhov twg los: ASTM A484 / A484M §1.2, txoj cai ua ntej tau hais txog ib txwm nyob thoob plaws cov ntawv (ANSI Webstore cov npe).

Yuav Ua Li Cas Cov Tshuaj Txhuam Hniav Sib Txawv Ntawm A276 thiab A479?

Chemistry sib tshooj hnyav ntawm ob qhov tshwj xeeb rau cov qib sib koom, tab sis cov pa roj carbon qab nthab yog qhov nthuav dav feem ntau yuav txawv.Rau ntau qib sib txawv, A276 teeb tsa cov ntsiab lus qis tshaj plaws ntawm A479 tso cai, uas yog ib qho laj thawj uas tib qib nominal npe tseem tuaj yeem sawv cev rau ob daim ntawv pov thawj sib txawv.

Vim tias qib -los ntawm- qib txwv sib txawv ntawm cov ntawv luam tawm thiab cov alloys tshwj xeeb, cov lus tswj xyuas chemistry hauv cov ntawv tam sim no ntawm txhua tus qauv - tsis yog txoj cai dav dav ntawm tus ntiv tes xoo - yuav tsum yog cov ntaub ntawv siv rau kev tshuaj xyuas ntawv pov thawj.

Qhov twg cov khoom tsom xam kam rau ua los ntawm

Thaum lub mills cov khoom tsom xam (ib daim tshev ua tiav ntawm qhov tiav bar es tsis yog lub ladle qauv) qhia tau hais tias qhov tshwm sim me ntsis sab nraum qhov kev teev tseg, A484 cov khoom- soj ntsuam cov lus pom zoo - tsis yog A276 lossis A479 - teeb tsa deb npaum li cas qhov kev sib txawv tau tso cai mus ua ntej lub tshav kub tsis lees paub. Cov lus no siv rau carbon, manganese, phosphorus, sulfur, silicon, chromium, npib tsib xee, molybdenum, thiab ntau yam ntawm lwm yam alloying ntsiab.

Tau qhov twg los: ASTM A484 / A484M, kev soj ntsuam cov khoom lag luam kam rau ua (store.astm.org npe).

Yuav ua li cas Mechanical Property Verification Requirements txawv?

Ob qho qauv tsim qhov tsawg kawg nkaus lub zog, lub zog tensile, thiab elongation los ntawm qib, tab sis A479 feem ntau raug kho raws li kev soj ntsuam nruj dua ntawm ob qhov muab nws lub siab - kev pabcuam.Hauv kev xyaum, cov neeg yuav khoom hais txog A479 yuav tsum xav kom muaj kev soj ntsuam ze dua ntawm cov tshuab ntsuas zaus thiab tshaj tawm tshaj qhov piv txwv A276.

Mechanical xeem zaus, piv txwv qhov chaw, thiab tshaj tawm hom ntawv rau ob qho tib si specifications taug qab rov qab rau A484 cov kev sim dav dav, uas yog vim li cas ib daim ntawv ntsuam xyuas zeb rau ob tus qauv ua raws li tus qauv paub txawm tias qhov kev lees paub txawv ntawm qib thiab specification.

Dab tsi Dimensional Tolerances thiab Finish Conditions siv?

Dimensional kam rau ua thiab kev ua tiav yog tswj hwm los ntawm ASTM A484, tsis yog los ntawm A276 lossis A479 tus kheej.A484's Table 1 teev qhov kev tso cai hloov pauv nyob rau hauv txoj kab uas hla, tawm - ntawm - puag ncig, thiab ncaj rau stainless bar, sib txawv los ntawm cov khoom siv thiab cov nominal loj.

"Cold-finished" yog lo lus uas feem ntau nkag siab yuam kev hauv cov ntsiab lus no. Hauv kev txiav txim siab dav dav, kev ua tiav txias yog cov txheej txheem ntawm kev ua haujlwm kub ntxiv - tiav bar nrog kev ua haujlwm kho tshuab ntxiv kom ua tiav qhov kev ua haujlwm siab dua thiab txhim kho nto tiav - nws tsis piav qhia txog kev sib cais lossis qib.

Rau cov neeg yuav khoom ua haujlwm rau AMS es tsis yog ASTM cov lus qhia, qhov sib npaug ntawm cov ntawv pov thawj yog AMS 2241 rau stainless hlau bar thiab AMS 2261 rau npib tsib xee alloy bar - AMS tsis muaj cov ntaub ntawv kaus uas tsom iav A484 lub luag haujlwm hla ntau yam khoom tshwj xeeb.

Cov qhab nia twg feem ntau tau lees paub rau ntau tshaj ib tus qauv?

Ntau cov qib austenitic thiab martensitic tau siv ntau dua li niaj zaus dual - tau lees paub rau ob qho tib si A276 thiab A479, vim tias lawv cov chemistry thiab cov khoom siv kho tshuab ua tau raws li ob qho kev qhia tshwj xeeb ib txhij.Qhov no yog qhov yooj yim rau cov khoom lag luam, tab sis ob daim ntawv pov thawj yuav tsum tau sau rau hauv daim ntawv qhia txog kev xeem mills - nws tsis tuaj yeem xam los ntawm lub npe qib ib leeg.

Tau qhov twg los: Cov qauv kev pab them nqi kawm tau muab tso ua ke los ntawm ASTM A276/A479 kev qhia sib piv (jianglinsteel.com; htsteelpipe.com; sakysteel.com).

Vim hais tias A276 thiab A479 bar tuaj yeem saib zoo ib yam thiab sib faib qhov sib txawv, qhov tsos ib leeg yeej tsis txaus los lees paub qhov kev qhia tshwj xeeb ntawm qhov twg. Daim ntawv qhia txog kev xeem mills - hla- hais tawm tsam daim ntawv xaj yuav khoom - yog qhov kev lees paub uas ntseeg tau.

Yuav Ua Li Cas A276, A479, thiab A484 Sib Piv Ib Sab?

Cov lus hauv qab no qhia txog qhov twg txhua tus qauv zaum hauv qhov tshwj xeeb hierarchy thiab nws tswj tau dab tsi.Siv nws raws li tus ntoo khaub lig nrawm- siv thaum tshuaj xyuas daim ntawv xaj xaj lossis daim ntawv tshaj tawm xov xwm rau qhov kev xav tau ntawm qhov project.

Tau qhov twg los: ASTM A276, A479/A479M, thiab A484/A484M scope nqe lus (astm.org / store.astm.org / ansi.org cov npe).

Cov neeg yuav khoom yuav tsum lees paub dab tsi ua ntej muab daim ntawv xaj xaj?

Paub tsib yam khoom ua ntej qhov kev txiav txim raug muab tso rau: qhov tseeb qauv tsim, qib thiab cov khoom siv, cov chav kawm A484 kam rau ua, qhov yuav tsum tau muaj kev xeem ntsuas, thiab qib ntawv pov thawj.Txhua qhov no txiav txim siab seb lub bar uas tuaj txog yuav ua tiav qhov kawg - siv daim ntawv thov.

Tus qauv tsim - A276, A479, lossis ob qho tib si, tau hais meej meej es tsis txhais los ntawm qib npe.

Qib thiab rooj tog zaum - xws li, 316L, kub- ua haujlwm thiab ua kom tiav, raws li A484 plaub qhov kev tso cai.

Dimensional kam rau ua chav kawm - kub-tiav lossis txias-tiav, referencing A484 Table 1.

Mechanical test scope - tensile, yield, elongation, and any supplementary requirements xws li impact test for low -temperature service.

Cov ntawv pov thawj qib - EN 10204 Hom 2.1, 3.1, lossis tag nrho thib peb- tog neeg pov thawj daim ntawv tshaj tawm, sib phim rau qhov kev thuam ntawm daim ntawv thov.

Rau cov khoom uas tau teev tseg rau ASME Tshooj VIII siab hlab ntsha lossis B31.3 txheej txheem piping systems, daim ntawv xaj yuav tsum tau hais txog ASME SA - qhov sib npaug, vim tias kev ua raws cai raug txheeb xyuas tawm tsam ASME tsab, tsis yog ASTM ib leeg.

Cov lus nug nquag

Q: Ib puag ncig bar tuaj yeem ntsib A276 thiab A479 tib lub sijhawm?

A: Yog lawm. Yog hais tias lub bar chemistry, mechanical zog, thiab kev ntsuam xyuas ua tau raws li ob qho kev qhia tshwj xeeb, lub zeb tuaj yeem muab daim ntawv pov thawj dual. Daim ntawv tshaj tawm kev xeem zeb yuav tsum hais ob qho kev xaiv kom meej es tsis tso nws txhais.

Q: Puas yog ASTM A484 hloov A276 lossis A479 ntawm kev yuav khoom?

A: No. A484 tsis muaj cov khoom lag luam ywj pheej - nws tsis tuaj yeem xaj ib leeg. Nws ib txwm ntxiv cov tswv cuab tshwj xeeb xws li A276 lossis A479, thiab qhov twg ob qhov tsis sib haum xeeb, tus tswv tsev khoom specification tswj.

Q: Puas yog A479 xav tau rau ASME code-stamped siab hlab ntsha?

A: A479, los yog nws qhov sib npaug ASME SA-479, yog cov lus qhia feem ntau siv rau stainless bar Tshuag siv hauv ASME Tshooj VIII siab lub nkoj tsim thiab lwm yam khoom siv siab.

Q: Puas yog cov tshuaj muaj pes tsawg leeg ntawm A276 thiab A479 zoo ib yam rau tib qib?

A: Lawv zoo sib xws tab sis tsis yog ib txwm zoo ib yam. Cov ntsiab lus ntawm cov pa roj carbon monoxide yog qhov nthuav dav feem ntau yuav txawv ntawm ob qhov kev qhia tshwj xeeb rau qib muab, yog li cov lus tswj hwm kev tswj hwm hauv tsab ntawv tam sim no yuav tsum tau tshuaj xyuas ntau dua li qhov xav tau.

Q: Qhov ntev ntev ntev rau stainless round bar tuaj qhov twg?

A: Los ntawm ASTM A484 cov lus kam rau ua, hais los ntawm ob qho tib si A276 thiab A479 es tsis rov ua nws tus kheej hauv ob daim ntawv.