Lub zog loj Bolts vs Cov Bolts tsis tu ncua - Qhov txawv ntawm qhov tseem ceeb & Cov lus qhia xaiv

Qhov sib txawv ntawm qhov sib txawv ntawm qhov muaj zog siab thiab tsis tu ncua bolts

Txhais Kev Ciam Teb - Feem ntau Qib 8 / 8.8 raws li qhov siab -Lub zog pib

Qhov sib txawv ntawm siab - lub zog thiab cov bolts tsis tu ncua yog txhais los ntawm cov khoom siv kho tshuab es tsis yog txhua qhov kev faib tawm. Hauv SAE system, Qib 8 (150 ksi yam tsawg kawg nkaus tensile) yog dav suav tias yog qhov pib rau siab - lub zog bolting. Hauv cov txheej txheem metric, ISO cov cuab yeej chav kawm 8.8 (800 MPa tensile) sawv cev rau thaj tsam qis, nrog 10.9 thiab 12.9 cais raws li siab -lub zog. Hauv qab no cov kauj ruam, bolts xws li SAE Qib 2 thiab Qib 5, lossis ISO 4.6 thiab 6.8, yog suav tias yog lub zog tsis tu ncua rau cov khoom siv uas tsis yog - tseem ceeb, lub teeb rau nruab nrab cov ntawv thov.

Mechanical Property Differences - Tensile/Yield/Hardness/Preload

Siab - lub zog bolts xa cov tensile ntau dua thiab cov txiaj ntsig zoo piv rau cov bolts li niaj zaus - Qib 8 bolt muaj 2.5 npaug ntawm lub zog tensile ntawm Qib 2 bolt. High- lub zog bolts tau kho cua sov (quenched thiab tempered) kom ua tiav lawv cov khoom siv kho tshuab, ua rau muaj zog dua (33-39 HRC rau Qib 8 vs 19-30 HRC rau Qib 5) thiab muaj peev xwm ua tau ntau dua. Qhov siab dua preload muaj peev xwm txhais tau tias muaj zog bolts tuaj yeem tsim kom muaj zog clamping ntau dua, uas yog qhov tseem ceeb rau kev sib koom ua ke nruj thiab qaug zog tiv thaiv hauv kev sib txuas ntawm cov qauv.

Kev sib txawv ntawm daim ntawv thov - Cov qauv sib txuas vs General Machinery

Siab - lub zog bolts yog qhov yuav tsum tau ua rau cov qauv hlau sib txuas hauv cov tsev, txuas hniav, thiab cov cuab yeej hnyav uas qhov sib koom ua ke yuav tsum xa cov qauv tsim los ntawm kev sib tsoo lossis kev sib txhuam. Cov ntawv thov no xav tau kev twv ua ntej ua ntej thiab plam - kev sib txuas tseem ceeb. Cov bolts tsis tu ncua yog tsim nyog rau kev sib dhos tshuab dav dav, cov khoom siv lub teeb mounting, tsis yog - cov qauv kev txhawb nqa, thiab kev ceev ceev ib ntus qhov twg cov loads qis dua thiab qhov tshwm sim ntawm kev xoob tsis tshua muaj hnyav.

High Strength Bolt Standard Systems

ASTM A325 / A325M - Txheej Txheem Thaum tshav kub kub-Kho Carbon Steel / Alloy Steel Bolts

ASTM A325 (tam sim no sib sau ua ke rau hauv ASTM F3125) npog cov cua sov- kho cov pa roj carbon steel lossis hlau alloy steel qauv bolts nrog lub zog tensile yam tsawg kawg nkaus ntawm 120 ksi rau txoj kab uas hla mus txog 1 nti. A325 bolts yog qhov siab tshaj plaws - lub cev muaj zog ntsia liaj qhov rooj nyob rau hauv North America, siv rau steel - mus rau - steel kev sib txuas hauv tsev thiab txuas hniav. Lawv muaj nyob rau hauv ob hom: Hom 1 (carbon lossis alloy steel) thiab Hom 3 (weathering steel). A325 bolts xav tau kev teeb tsa nrog kev tswj xyuas ua ntej siv qhov tig - ntawm - txiv ntseej lossis calibrated torque txoj kev.

ASTM A490 / A490M - Lub zog siab dua cov qauv Alloy Steel Bolts

ASTM A490 (tam sim no nyob rau hauv F3125) npog alloy steel qauv bolts nrog lub zog tensile yam tsawg kawg nkaus ntawm 150 ksi rau txoj kab uas hla mus txog 1-1/2 ntiv tes. A490 bolts muab kwv yees li 25% lub zog ntau dua li A325, ua kom cov ntsia hlau me me los yog tsawg dua bolts rau tib lub peev xwm sib txuas. Lawv raug txwv tshwj xeeb los ntawm kub-dip galvanizing vim hydrogen embrittlement txaus ntshai ntawm lawv cov qib hardness siab dua (33-38 HRC). A490 bolts yog siv rau hauv cov khoom siv hnyav nrog rau cov tsev siab siab, cov qauv tsim, thiab cov choj retrofits.

ASTM F3125 - Tam sim no Unified Standard

ASTM F3125 tau tshaj tawm hauv xyoo 2015 los sib sau ua ke A325 thiab A490 specifications rau hauv ib qho qauv nrog cov qib. Qib A325 npog cov khoom qub A325, thiab Qib A490 npog cov khoom qub A490. Tus qauv tseem suav nrog cov huab cua hloov pauv huab cua thiab muab cov kev ntsuas zoo ib yam thiab cov kev xav tau zoo thoob plaws txhua qib ntawm cov qauv bolt. F3125 suav nrog ob qho tib si hnyav hex qauv bolts thiab twist -tawm hom nro tswj bolts.

Paub meej Mechanical Properties Comparison

Installation Requirements rau High Strength Bolts

Siab - lub zog ntawm cov qauv bolts yuav tsum tau tswj kev teeb tsa kom ua tiav qhov kev teev cia ua ntej. Txoj kev tig - ntawm - txiv ntseej txoj kev zawm cov txiv ntoo dhau los ntawm snug- nruj mob los ntawm kev sib hloov (feem ntau yog 1/2 txog 2/3 tig rau bolts 4 txoj kab uas hla, thiab 1 tig rau ntev bolts). Txoj kev torque siv lub calibrated torque wrench los siv tus nqi torque uas tau teev tseg raws li qhov xav tau ua ntej. Twist-tawm hom nro tswj bolts muaj qhov kawg splined uas txiav tawm ntawm qhov tsim nro, muab kev tswj ncaj qha preload yam tsis muaj kev ntsuas torque. Siab - lub zog bolts feem ntau tsis tuaj yeem rov qab siv dua - cov yas deformation thaum pib tensioning thiab muaj peev xwm qaug zog puas tsuaj los ntawm cov kev pabcuam loads ua rau rov ua kom tsis muaj zog rau kev sib txuas ntawm cov qauv.

High Strength vs Regular Bolt Selection Guide

Lub tsev steel qauv yuav tsum siv A325 los yog A490 siab - lub zog bolts rau tag nrho cov load -cov kabmob sib txuas kom tau raws li cov cai hauv tsev. Kev sib txuas ntawm choj yuav tsum muaj siab - lub zog bolts nyob rau hauv kev sib txhuam- hom kev sib txuas uas kev sib tsoo yog qhov tseem ceeb. Kev teeb tsa cov cuab yeej siv dav siv tau siv Qib 5 lossis 8.8 bolts qhov twg cov lej tsis siv. Cov yeeb nkab txhawb nqa thiab cov tswv cuab lub teeb pom kev tuaj yeem siv A307 lossis Qib 2 bolts rau qhov tsis yog{13}}cov haujlwm tseem ceeb. Hoisting thiab nqa daim ntawv thov ua haujlwm siab - lub zog bolts vim muaj kev nyab xeeb thiab kev xav txog kev thauj khoom dynamic.

Hydrogen Embrittlement Risk nyob rau hauv High Strength Bolts

Hydrogen embrittlement yog ib qho kev txhawj xeeb tseem ceeb rau siab - lub zog bolts nrog hardness saum 38 HRC. Thaum lub sij hawm pickling, electroplating, los yog galvanizing, hydrogen atoms tuaj yeem nkag mus rau hauv cov hlau thiab ua rau ncua sij hawm nkig tawg nyob rau hauv kev nyuaj siab tensile. ASTM A490 bolts (hardness 34-41 HRC) tshwj xeeb tshaj yog raug rau - tus qauv txwv tsis pub kub-dip galvanizing ntawm A490 bolts tshwj tsis yog tias tshwj xeeb hydrogen embrittlement nyem ci yog ua. Rau siab - lub zog bolts xav tau kev tiv thaiv corrosion, mechanical galvanizing lossis Dacromet txheej yog qhov kev xaiv zoo tshaj plaws uas tshem tawm cov kev pheej hmoo hydrogen embrittlement cuam tshuam nrog electroplating thiab kub-dip txheej txheem.

Tus nqi sib piv

High- lub zog bolts raug nqi 2-4 npaug ntau dua li cov bolts ntawm tib qhov loj vim yog cov khoom siv hlau, kev kho cua sov, thiab cov kev xeem zoo. Txawm li cas los xij, lub zog siab dua tso cai rau tsawg dua los yog me dua bolts los nqa tib lub thauj khoom, uas tuaj yeem cuam tshuam tus nqi ntawm ib qho -unit. Cov nqi txhim kho yog siab dua rau siab - lub zog bolts vim yog tswj cov txheej txheem nruj thiab kev soj ntsuam yuav tsum tau ua. Nyob rau hauv lub neej voj voog, siab - lub zog bolted kev sib txuas muab kev ntseeg tau ntau dua thiab txo kev txij nkawm, tshwj xeeb tshaj yog nyob rau hauv dynamic lossis qaug zog cov ntawv thov uas ib txwm bolts yuav xav tau ib ntus retightening lossis hloov.

ManufacturerPipe's Supply Capabilities

ManufacturerPipe muab cov khoom siv siab- lub zog bolts hauv ASTM A325/A490/F3125, ISO 10.9/12.9, thiab SAE Qib 8, nrog rau cov bolts tsis tu ncua hauv Qib 2, Qib 5, ASTM A307, thiab ISO 8.8. Peb tsim ob qho tib si hnyav hex taub hau bolts thiab twist -tawm hom nro tswj bolts. Tag nrho cov siab - lub zog bolts yog muab nrog cov ntaub ntawv pov thawj torque thiab cov ntaub ntawv xeem cov ntaub ntawv kom ua tau raws li cov qauv kev ua haujlwm pov thawj. Peb cov kev pabcuam txheej txheej suav nrog cov tshuab galvanizing thiab Dacromet rau siab - lub zog bolts xav tau kev tiv thaiv corrosion yam tsis muaj hydrogen embrittlement txaus ntshai.

Xav tau lub zog siab lossis tsis tu ncua bolts?

Hu rau ManufacturerPipe rau qib zoo bolt rau koj qhov project nrog cov ntawv pov thawj zoo thiab kev sim.