ASTM A490 vs ASTM A325 Bolts

Ob leeg ASTM A490 thiab ASTM A325 Bolts yog hnyav hex qauvbolts. Koj puas paub qhov txawv ntawm ASTM A490 thiab ASTM A325? Hnub no wb tham txog nws.

Cov lus teb yooj yim yog tias ASTM A490 hnyav-lub luag haujlwm hexagonal bolts muaj lub zog siab dua li A325 hexagonal bolts. A325 bolts muaj lub zog tensile yam tsawg kawg nkaus ntawm 120ksi, thaum A490 bolts muaj lub zog tensile ntau ntawm 150-173ksi.

Ntxiv rau qhov no, muaj qee qhov sib txawv ntawm A490 thiab A325.

Khoom siv

• A325 bolts yog tsim los ntawm high-strength nruab nrab carbon steel, thiab cov bolts feem ntau pom nyob rau hauv lub tsev tsim.
• A490 bolts yog tsim los ntawm high-strength tshav kub kho steel
• A325 qauv bolts tuaj yeem ua taukub-dip galvanizedthiab feem ntau pom nrog cov txheej txheem ntawd. A325 galvanized bolts yog nrov vim lawv cov khoom tiv thaiv corrosion.
• A490 cov qauv bolts muaj zog dua, lawv tsis tuaj yeem kub-dip galvanized vim lub zog no. Vim lub zog tensile siab ntawm A490 bolts, lawv muaj kev pheej hmoo ntawm hydrogen embrittlement vim galvanizing. Qhov no tuaj yeem ua rau tsis ua haujlwm ntxov ntawm lub bolt thiab tuaj yeem ua tsis muaj zog.

Txheej

Kev teeb tsa

Ob lub A3125 thiab A325 bolts poob raws li ASTM F490 specification thiab tshwj xeeb yog siv rau cov qauv bolts. Feem ntau, cov qauv bolts yog lub luag haujlwm hnyav hex bolts lossis nruj tswj bolts uas feem ntau luv dua, luv dua li qhov nruab nrab xov, thiab tsis tuaj yeem txo lub cev txoj kab uas hla.

Raws li tus qauv, qee qhov kev zam raug tso cai. Ua ntej xyoo 2016, ASTM A325 thiab ASTM A490 tau cais tshwj xeeb. Txij li thaum lawv tau raug muab faib ua cov chav kawm hauv F3125 specification. Thaum pib, A325 thiab A490 bolts yuav tsum muaj lub taub hau hex hnyav thiab tsis muaj lwm yam kev teeb tsa tau tso cai. Tsis tas li ntawd, cov xov luv luv tsis tuaj yeem hloov pauv.

Txawm li cas los xij, raws li tus tshiab F3125 specification, txhua lub taub hau style raug tso cai thiab cov xov ntev tuaj yeem hloov pauv. Cov kev hloov pauv rau A325 thiab A490 kev teeb tsa raug teev tseg los ntawm kev ntxiv "S" mus rau qhov chaw ruaj khov rau lub taub hau.

Lwm qhov sib txawv ntawm cov xov ntev yog tias A325 bolts yog loj-tsim nyob rau hauv ib tug tag nrho-threaded version, yog hais tias lawv muaj plaub diameters los yog tsawg dua nyob rau hauv ntev. Hom ntsia liaj qhov rooj no feem ntau hu ua A325T. Lub tag nrho threaded version ntawm no A325 bolts tsis muaj rau A490 bolts.

Kev sim

A325 galvanized bolts uas tab tom yuav nrog cov txiv ntoo thiab lub tshuab ntxhua khaub ncaws tawv yuav tsum tau ua kom muaj peev xwm sib hloov. Kev ntsuas kev sib hloov ua kom ntseeg tau tias cov ntsia hlau sib dhos muaj peev xwm txhim kho lub zog clamping kom raug. Yuav kom dhau qhov kev xeem, lub rooj sib txoos yuav tsum ncav cuag qhov tsawg kawg nkaus ntawm kev sib hloov thiab ua tiav qhov yuav tsum tau nruj ua ntej tsis ua hauj lwm uas nyob ntawm txoj kab uas hla thiab ntev ntawm galvanized A325 ntsia liaj qhov rooj. Txij li thaum A490 bolts tsis tuaj yeem galvanized, qhov kev sim no tsis siv tau.

Tag nrho cov A490 bolts yuav tsum xeem dhau qhov kev xeem sib nqus. Qhov kev sim no yog siv los xyuas kom meej tias tsis muaj qhov tsis xws luag lossis tawg hauv cov hlau ntawm A490 bolt. Qhov kev sim no tsis tas yuav tsum tau rau A325 bolts

ASTM A 490 Cov Lus Qhia Tshwj Xeeb

Kab hauv qab

Thaum kawg, koj tus engineer yuav qhia cov qib twg ntawm F3125 tus qauv ntsia liaj qhov rooj uas koj yuav tsum tau siv, tab sis nws yog ib qho tseem ceeb kom nkag siab qhov txawv ntawm A325 thiab A490 qib. Qib A490 muaj zog dua qib A325, tab sis lub zog tsis yog tib yam uas txiav txim siab lub bolts. A490 bolts tsis tuaj yeem kub-dipped lossis mechanically galvanized. A325 qib tsis muaj zog, tab sis nws yog tus nqi qis dua uas tuaj yeem ua galvanized kom tsis txhob xeb.