Raws li peb txhua tus paub, cov ntaub ntawv ntawm stainless hlau fasteners tau muab faib ua austenitic stainless hlau, ferritic stainless hlau thiab martensitic stainless hlau.
Cov qib stainless hlau bolts tau muab faib ua 45, 50, 60, 70, thiab 80. Cov ntaub ntawv feem ntau muab faib ua austenite A1, A2, A4, martensite thiab ferrite C1, C2, thiab C4. Nws txoj kev qhia yog xws li A2-70, ua ntej thiab tom qab "--" feem qhia cov khoom siv ntsia hlau thiab qib zog.
1. Ferritic Stainless hlau
(15% -18% Chromium) - Ferritic stainless hlau muaj lub zog tensile ntawm 65,000 - 87,000 PSI. Txawm hais tias nws tseem tiv taus corrosion, nws tsis pom zoo siv rau hauv cov cheeb tsam uas muaj corrosion kuj, thiab yog haum rau stainless hlau screws nrog me ntsis corrosion kuj thiab kub tsis kam, thiab cov kev xav tau ntawm lub zog. Cov khoom no tsis tuaj yeem kho cua sov. Vim cov txheej txheem molding, nws yog magnetic thiab tsis haum rau soldering. Ferritic qib muaj xws li: 430 thiab 430F.
2.Martensitic Stainless hlau
(12% -18% Chromium) - Martensitic stainless hlau yog suav tias yog cov hlau nplaum hlau. Nws tuaj yeem raug kho kom sov kom nws cov tawv tawv thiab tsis pom zoo rau vuam. Stainless hlau ntawm hom no muaj xws li: 410, 416, 420, thiab 431. Lawv muaj lub zog tensile ntawm 180,000 thiab 250,000 PSI.
Hom 410 thiab Hom 416 tuaj yeem ua kom muaj zog los ntawm kev kho cua sov, nrog lub hardness ntawm 35-45HRC thiab zoo machinability. Lawv yog cov cua kub-resistant thiab corrosion-resistant stainless hlau screws rau dav siv. Hom 416 muaj cov ntsiab lus sulfur me ntsis thiab yog ib qho yooj yim-rau-txiav stainless hlau. Hom 420, nrog cov ntsiab lus sulfur ntawm R0.15%, tau txhim kho cov khoom siv kho tshuab thiab tuaj yeem ua kom muaj zog los ntawm kev kho cua sov. Qhov siab tshaj plaws hardness tus nqi yog 53-58HRC. Nws yog siv rau stainless hlau screws uas yuav tsum tau muaj zog dua.
3.Austenitic Stainless hlau
(15% -20% chromium, 5% -19% nickel) - Austenitic stainless hlau muaj qhov zoo tshaj plaws corrosion kuj ntawm peb hom. Chav kawm ntawm stainless hlau no suav nrog cov qib hauv qab no: 302, 303, 304, 304L, 316, 321, 347, thiab 348. Lawv kuj muaj lub zog tensile ntawm 80,000 - 150,000 PSI. Seb nws yog corrosion kuj, los yog nws mechanical zog zoo ib yam.
Hom 302 yog siv rau machined screws thiab self-tapping bolts.
Hom 303 Txhawm rau txhim kho qhov kev ua tau zoo, ib qho me me ntawm leej faj ntxiv rau Hom 303 stainless hlau, uas yog siv los ua cov txiv ntoo los ntawm cov khoom lag luam.
Hom 304 yog tsim rau kev ua cov hlau stainless screws los ntawm cov txheej txheem kub taub hau, xws li cov lus qhia ntev dua thiab cov kab loj loj, uas yuav dhau ntawm cov txheej txheem txias.
Hom 305 yog tsim rau kev ua stainless hlau screws los ntawm cov txheej txheem txias taub hau, xws li txias tsim ceev thiab hexagonal bolts.
316 thiab 317 hom, lawv ob leeg muaj hlau alloying Mo, yog li lawv lub zog kub thiab corrosion kuj yog siab dua 18-8 stainless hlau.
Hom 321 thiab Hom 347, Hom 321 muaj Ti, ib qho tseem ceeb alloying caij, thiab Hom 347 muaj Nb, uas txhim kho cov intergranular corrosion kuj ntawm cov khoom. Nws yog tsim rau stainless hlau txheem qhov chaw uas tsis annealed tom qab vuam los yog nyob rau hauv kev pab cuam ntawm 420-1013 ° C.
Post lub sij hawm: Lub Xya hli ntuj-18-2023
