Dab tsi yog cov ntaub ntawv tseem ceeb siv rau fasteners?
Aug 04, 2026
Standard fasteners nyob rau hauv kev ua lag luam feem ntau yog tsim los ntawm plaub hom ntaub ntawv: carbon steel, stainless hlau, tooj dag, thiab txhuas alloy.
1. Carbon hlau
Cov pa roj carbon steel tau muab faib ua qis- carbon, nruab nrab- carbon, thiab siab - carbon steels, nrog rau cov hlau alloy, raws li lawv cov ntsiab lus carbon.
① Tsawg- carbon steel (C% Tsawg dua lossis sib npaug li 0.25%): Hauv tsev hu ua A3 steel; thoob ntiaj teb hu ua 1008, 1015, 1018, 1022, thiab lwm yam. Nws yog tsuas yog siv rau cov khoom uas tsis muaj qhov tshwj xeeb hardness, xws li Qib 4.8 bolts, Qib 4 ceev, thiab cov ntsia hlau me me.
② Nruab nrab- carbon steel (0.25%
④ Alloy steel: Tsim los ntawm kev ntxiv cov ntsiab lus alloying rau cov pa roj carbon zoo tib yam los txhim kho cov khoom tshwj xeeb (xws li 35, 40CrMo, SCM435, 10B38). YFS (Fang Sheng) Qib 12.9 cov ntsia hlau feem ntau siv SCM435 chromium-molybdenum alloy steel, muaj feem ntau ntawm C, Si, Mn, P, S, Cr, thiab Mo.
2. Stainless hlau
Feem ntau categorized rau hauv: Austenitic (18% Cr, 8% Ni) -zoo tshav kub tsis kam, corrosion kuj, thiab weldability (xws li, A1, A2, A4); Martensitic (13% Cr)- qis corrosion kuj tab sis siab zog thiab hnav tsis kam (xws li C1, C2, C4); thiab Ferritic-18% Cr, zoo taub hau / forging zog, thiab corrosion kuj superior rau qib martensitic.
3. Tooj
Cov khoom siv feem ntau suav nrog tooj dag thiab zinc- tooj liab alloys. H62, H65, thiab H68 tooj dag yog thawj qib siv rau cov qauv fasteners.
4. Aluminium Alloy
Characterized by low density but high strength (approaching or exceeding that of high-quality steel) and good plasticity; nws tuaj yeem ua tiav rau hauv ntau yam profiles. Nws muaj cov khoom siv hluav taws xob zoo heev, thermal conductivity, thiab corrosion kuj, ua rau nws siv dav hauv kev lag luam - thib ob tsuas yog rau cov hlau raws li kev siv ntim.
5. Alloy Steel (tseem hais tshwj xeeb rau chromium-molybdenum alloy steel, xws li SCM435).
