Lub ntsiab lus ntawm Bolt Qib

Raws li cov qauv tsim, cov qib kev ua tau zoo ntawm carbon steel thiab alloy steel bolts tau muab faib ua ntau tshaj 10 qib, suav nrog 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, thiab 12.9. Ntawm lawv, bolts ntawm qib 8.8 thiab siab dua yog ua los ntawm cov hlau tsis tshua muaj carbon hlau lossis cov pa roj carbon nruab nrab thiab tau txais kev kho cua sov (quenching thiab tempering), feem ntau hu ua bolts muaj zog, thaum lwm tus feem ntau hu ua bolts zoo tib yam. . Daim ntawv qhia qib qib bolt muaj ob feem ntawm tus lej, sawv cev rau tus nqi nominal tensile lub zog thiab cov txiaj ntsig lub zog piv ntawm cov khoom siv ntsia liaj qhov rooj. Stainless hlau bolts tau muab faib ua A1-50, A1-70, A1-80, A2-50, A2-70, A2-80, A{ {29}}, A3-70, A3-80, A4-50, A{33}}, A{34}}, A{35}}, A{{ 36}}, A5-80, C1-50, C1-70, C1-110, C4-50, C4-70, C{43} } }, F1-45, F1-60 raws li qib kev ua tau zoo ntawm cov hlau. Thawj tsab ntawv thiab tus lej sawv cev rau pawg ntawm cov hlau tsis muaj steel, thaum tus lej thib ob thiab thib peb sawv cev rau 1/10 ntawm lub zog tensile.