Qib 8 feem ntau yog hais txog kev faib cov ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus ntawm fasteners xws li bolts, ceev, thiab screws. Nov yog qhov "Qib 8" feem ntau txhais tau tias:
Qib 8 Fasteners:
Siab zog: Qib 8 fasteners paub txog lawv lub zog tensile siab thiab tsis kam rau shear quab yuam thiab kev co.
Khoom siv: Qib 8 fasteners feem ntau yog tsim los ntawm cov hlau alloy uas tau txais kev kho cua sov kom ua tiav lawv cov khoom siv kho tshuab uas xav tau.
Specifications: Cov kev cai tshwj xeeb rau Qib 8 fasteners tuaj yeem sib txawv raws li cov qauv kev lag luam lossis cov qauv tshwj xeeb, xws li ASTM, SAE, lossis ISO qauv.
Kev txheeb xyuas: Qib 8 fasteners feem ntau yog cim nrog cov cim tshwj xeeb los qhia lawv qib, xws li "8" lossis "Qib 8" stamped ntawm lub taub hau ntawm bolts lossis txiv ntseej.
Daim ntawv thov: Qib 8 fasteners yog dav siv nyob rau hauv kev lag luam uas muaj zog thiab kev ntseeg siab yog qhov tseem ceeb, xws li tsheb, kev tsim kho, tshuab, thiab aerospace.
Mechanical Properties:
Tensile zog: Qib 8 fasteners feem ntau muaj lub zog tensile yam tsawg kawg nkaus ntawm 150, 000 psi (phaus ib square inch) lossis 1,030 MPa.
Yield zog: Qib 8 fasteners muaj lub zog ua haujlwm siab, feem ntau tshaj 130, 000 psi lossis 896 MPa.
Hardness: Qib 8 fasteners yog hardened kom ua tiav qhov hardness, feem ntau nyob rau hauv thaj tsam ntawm 33 txog 39 HRC (Rockwell C nplai).
Khoom siv:
Alloy Steels: Qib 8 fasteners feem ntau yog tsim los ntawm cov hlau alloy uas muaj cov ntsiab lus xws li carbon, manganese, chromium, molybdenum, thiab qee zaum vanadium. Cov ntsiab lus alloying no pab txhawb lub zog thiab hardness ntawm cov khoom.
Kev kho cua sov: Tom qab tsim, Qib 8 fasteners raug kho cua sov txheej txheem xws li quenching thiab tempering kom ua tau raws li qhov xav tau ntawm cov khoom siv tshuab.
Common Qib nyob rau hauv txawv Standards:
Hauv cov txheej txheem ASTM, Qib 8 feem ntau sib raug rau cov kev qhia tshwj xeeb xws li ASTM A354 Qib BD lossis ASTM A490 rau bolts, thiab ASTM A563 Qib DH lossis ASTM F568M Qib 8 rau txiv ntseej.
Hauv SAE (Society of Automotive Engineers) system, Qib 8 sib raug rau SAE J429 Qib 8 rau bolts thiab screws.
Nyob rau hauv ISO system, Qib 8 fasteners feem ntau muab faib raws li ISO 898-1 Qib 8.8.
Daim ntawv thov:
Qib 8 fasteners yog siv rau hauv cov ntawv thov tseem ceeb uas yuav tsum muaj lub zog thiab kev ntseeg siab, xws li hauv kev sib txuas ntawm cov qauv, cov tshuab hnyav, cov khoom siv tsheb, thiab cov khoom siv hauv aerospace.
Nws yog ib qho tseem ceeb uas yuav tsum tau xa mus rau cov qauv tshwj xeeb thiab cov kev qhia tshwj xeeb kom ntseeg tau tias qhov kev xaiv tsim nyog thiab siv cov qib 8 fasteners rau cov ntawv thov tshwj xeeb, raws li cov kev xav tau yuav txawv nyob ntawm kev lag luam thiab daim ntawv thov.
