- English
- Chinese
- French
- German
- Portuguese
- Spanish
- Russian
- Japanese
- Korean
- Arabic
- Irish
- Greek
- Turkish
- Italian
- Danish
- Romanian
- Indonesian
- Czech
- Afrikaans
- Swedish
- Polish
- Basque
- Catalan
- Esperanto
- Hindi
- Lao
- Albanian
- Amharic
- Armenian
- Azerbaijani
- Belarusian
- Bengali
- Bosnian
- Bulgarian
- Cebuano
- Chichewa
- Corsican
- Croatian
- Dutch
- Estonian
- Filipino
- Finnish
- Frisian
- Galician
- Georgian
- Gujarati
- Haitian
- Hausa
- Hawaiian
- Hebrew
- Hmong
- Hungarian
- Icelandic
- Igbo
- Javanese
- Kannada
- Kazakh
- Khmer
- Kurdish
- Kyrgyz
- Latin
- Latvian
- Lithuanian
- Luxembou..
- Macedonian
- Malagasy
- Malay
- Malayalam
- Maltese
- Maori
- Marathi
- Mongolian
- Burmese
- Nepali
- Norwegian
- Pashto
- Persian
- Punjabi
- Serbian
- Sesotho
- Sinhala
- Slovak
- Slovenian
- Somali
- Samoan
- Scots Gaelic
- Sindhi
- Sundanese
- Swahili
- Tajik
- Tamil
- Telugu
- Thai
- Ukrainian
- Urdu
- Uzbek
- Vietnamese
- Welsh
- Xhosa
- Yiddish
- Yoruba
- Zulu
- Kinyarwanda
- Tatar
- Oriya
- Turkmen
- Uyghur
Giredhi 8.8 Dacromet Hex Bolt –IN 933 | ISO 4014 | Yakazara-Thread Hexagon Bolt ine Dacromet Anti-Corrosion Coating
2026-07-06
Iyo Giredhi 8.8 Dacromet DIN 933 hex bolt inosanganisa yepakati-yepamusoro mechanicha simba neindasitiri-inotungamira corrosion kudzivirira. Yakagamuchirwa zvakanyanya mukugadzirwa kwekunze kwesimbi, simba remhepo, zvivakwa zvenjanji, uye kuvaka bhiriji, iyi fastener inopa yakavimbika clamping kuita pasi peinoda mamiriro ezvakatipoteredza - pasina njodzi yehydrogen embrittlement ine chekuita nesarudzo dzemagetsi.
Chikamu 1 - Kunzwisisa Grade 8.8
Zvinoenderana neISO 898-1, iyo kirasi yezvivakwa dhizaini yebhoti ine nhamba mbiri dzakapatsanurwa nedecimal point. YeGiredhi 8.8:
Nhamba yekutanga (8): Inoratidza 1/100 yezita resimba rekusimba muMPa - kureva, shoma simba rekusimba = 800 MPa.
Nhamba yechipiri (8): Inotaridza chiyero chesimba regoho diki kusvika kusimba rekushomeka × 10 — kureva, goho reshiyo = 0.80, zvichireva simba regoho diki = 640 MPa.
Mechanical Properties
| Property | Value | Standard | Test Method |
| Kusimba Simba (min.) | 800 MPa | ISO 898-1 | Tensile test |
| Goho Simba (min.) | 640 MPa | ISO 898-1 | Tensile test |
| Proof Load Stress | 580 MPa | ISO 898-1 | Proof load |
| Yield Ratio | 0.80 | ISO 898-1 | Calculation |
| Kuoma (Vickers) | 245–335 HV | ISO 6507 | Vickers bvunzo |
| Kuoma (Rockwell) | 22–32 HRC | ISO 6508 | Rockwell bvunzo |
| Elongation paBreak (min.) | 12% | ISO 898-1 | Tensile test |
| Impact Kuoma (min.) | 52 J @ -20 °C | ISO 898-1 | Charpy test |
Giredhi 8.8 fasteners inogadzirwa kubva pakati-kabhoni simbi (semuenzaniso, 45 # / SAE 1045) kana yakaderera-alloy simbi (semuenzaniso, 40Cr / SCM435) uye inoiswa pasi pekudzima uye kupisa (Q&T) kupisa kurapwa kuti uwane inodiwa simba profiles. Iko kusanganiswa kwesimba rakanyanya kusimba uye goho rinodzorwa reshiyo inoita kuti mabhaudhi eGiredhi 8.8 avimbike zvakanyanya mumashure akatakurwa kubatanidza zvimiro.
Yakajairika Mashandisirwo Minda
Kugadzirwa kwesimbi: Kusungirirwa kwechimiro mumafuremu, matanda, matrusses (BS EN 14399 / ASTM A325-yakaenzana).
Infrastructure: Bridge decking, crane rails, highway guardrails, majoini ekuwedzera.
Renewable energy: Mhepo turbine tower base yekubatanidza, solar mounting zvimiro.
Michina: General-chinangwa michina mafuremu, zvokurimisa zvokushandisa, zvinhu kubata.
Motokari (isina-yakakosha): Kukwirisa chassis, muviri-kune-furemu, injini chikara chinotsigira.
Chikamu 2 - DIN 933 Hex Bolt Standard
DIN 933 (Deutsches Institut für Normung, German Standards Institute) inotsanangudza zvimiro uye zvejometri zvinodiwa zvemabhaudhi ane hexagon akarukwa zvizere ane shinda dzakakora metric pitch. Kunyangwe yakatsiviwa zvakanyanya neISO 4017 padanho repasi rose, DIN 933 inoramba iri iyo inonyanya kutaurwa muEurope neyepasi rose maindasitiri ekutenga.
Zvinhu zvakakosha zveDIN 933
Full thread: Iyo bhaudhi yakarukwa pahurefu hwayo hweshank - kuwedzera tambo yekubatanidzwa uye kugovera mutoro.
Hexagonal head: Yakajairwa hupamhi-yakayambuka-mafurati dimension inobvumira kushandiswa neyakajairwa metric spanners uye socket wrenches.
Coarse thread pitch: Metric coarse pitch (pa ISO 261) yekukurumidza kusangana uye kuramba kusunungura pasi pekuzunguza.
Dimensional tolerance: Chigadzirwa giredhi A (m ≤ 10d kana ≤ 150 mm) uye chigadzirwa giredhi B (akakura saizi) pa ISO 4759-1.
DIN 933 Dimension Reference Tafura
Marking Identification
DIN 933 Giredhi 8.8 mabhaudhi akaiswa mucherechedzo nechiratidzo chekirasi "8.8" uye chiratidzo chemugadziri. Kana Dacromet-yakaputirwa, imwe yekumaka kana tag inogona kuratidza kurapwa kwepamusoro.
Chikamu 3 - Dacromet Corrosion Dziviriro
Dacromet (zvakare yakanyorwa seDacrotised kana DACROMET®) is a chromate-isina, zinc-uye-aluminium flake-based water-borne coating tekinoroji yakatanga kugadzirwa neDiamond Shamrock Chemicals. Inopa kuchengetedzwa kwakatanhamara kwekudzivirirwa uye yave iyo yakasarudzika yekurapa pamusoro peGrade 8.8 mabhaudhi anoshandiswa kunze uye ane hukasha-nzvimbo.
Iyo Dacromet Inoshanda sei
Iyo yekuputira ine akawanda anopindirana zinc uye maflakes ealuminium akasungwa pamwe chete neinorganic chromate-based binder matrix, inoiswa nedip-spinning uye inoporeswa painoda kusvika 300 ° C. Iyo yakaturikidzana microstructure inogadzira nzira ine tortuous yeanoodza vamiririri, ichipa zvese zvipingamupinyi uye chibairo (galvanic) kuchengetedza:
Barrier protection: Dense, akaturikidzana flake layers anovharisa hunyoro uye chloride ions kuti isasvike pasireti yesimbi.
Kuzvipira (galvanic) kudzivirira: Zinc flakes ndeye electrochemically yakaderera kupfuura simbi; dzinoita ngura zvakanaka, dzichidzivirira mipendero yesimbi yakavhurika panzvimbo dzakachekwa nenzvimbo dzakakuvadzwa.
Kuzviporesa maitiro: Zinc corrosion zvigadzirwa zvinovhara zvishoma zvirema zvekupfeka, zvichiwedzera hupenyu hwekudzivirira.
Key Performance Data
| Property | Dacromet | Hot-Dip Galvanizing | Zinc Electroplating | Phosphating |
| Munyu Spray Resistance | ≥ 480 h (inogona kusvika 1000+ h) | 200–500 h | 96–120 h | <72 h |
| Coating Ukobvu | 6–10 µm | 50–100 µm | 5–15 µm | 5–15 µm |
| Hydrogen Embrittlement | Hapana (kubika hakudiwi) | Hapana | Dambudziko guru | Ngozi shoma |
| Thread Tolerance | Haina kubatwa (jasi rakatetepa) | Kazhinji kukanganiswa | Kazhinji OK | Kazhinji OK |
| RoHS / REACH Inoenderana | Hongu (hexavalent-Cr-isina) | Hongu | Inosiyana | Hongu |
| Typical Applications | Chimiro chekunze, shongwe yemhepo, bhiriji | Heavy panze | Indoor/light | Indoor |
Muedzo wekupfapfaidza munyu pa ISO 9227. Typical Dacromet ukobvu: 6–10 µm. Mibairo inogona kusiyana neyakagadzikwa uye nzira yekushandisa.
Inoshanda Mitemo & Zvinotsanangurwa
ISO 10683: Asina-electrolytically akaiswa zinc flake coatings for fasteners.
DIN EN ISO 10683: Kugamuchirwa kweEuropean ISO 10683.
ASTM F1136: Zinc/aluminium corrosion-protective coatings for fasteners.
VDA 235-104: YechiGerman mota chiyero che zinc flake coatings.
Nezve Fujirui Metal — Professional Fastener Manufacturer & Exporter
Fujirui Metal inogadzira uye inotumira kunze mabhaudhi chaiwo anosanganisira Giredhi 8.8 / 10.9 / 12.9 hex mabhaudhi, DIN 933 yakazara-tambo mabhaudhi, DIN 931 partial-shinda mabhaudhi, stud mabhaudhi, uye tsika fasteners. Sarudzo dzekurapa dzepamusoro dzinosanganisira Dacromet, Ruspert, hot-dip galvanising, uye zinc electroplating. Zvese zvigadzirwa zvinogadzirwa kune ISO, DIN, uye ASTM zviyero zvine yakazara zvinhu bvunzo zvitupa (MTC).
