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TESTING ARTICLE

sivi bolt nut testing

2026-11-13 10:19:39In Ko Mautolu

Fakamatala Sivi

'Oku fa'u 'a e sivi bolt nut testing ki hono fakahoko 'o e sivi fakatēnike 'o ha ngaahi bolt, nut, washer mo e ngaahi konga fua 'o e ta'u'anga fakapōpula, 'o a'u ki hono pau 'oku 'aonga kinautolu 'i he ngaahi palesi 'oku fiha 'i ai ha ma'u lahi, pē na'a fai ha fakangatangata 'o e ivi 'oku tauhi ai 'a e ngaahi tu'unga faka'ētekite. Ko e bolt mo e nut 'oku ngaue 'i he ngaahi palesi hange ko e fakanonga 'o e hala fe'unga ki he vaha'a moa, 'a e ngaahi hala electricity, 'a e ngaahi potu ki he manumanu, 'a e ngaahi misini 'o e kasa mo e ea, 'a e ngaahi potu 'o e fale 'oku fai 'i he palesi 'o e ngaahi me'alele, pea mo e ngaahi founga fakapapitangs. 'I he sivi bolt nut testing, 'oku tauhi 'a e ivi 'o e fakatotolo, 'a e lahi 'o e ivi 'oku lava ke, 'a e ivi 'o e uoua 'oku ne ai 'a e bolt, 'a e ngāue 'o e coating, pea mo e founga 'o e faito'o 'o e meykoloa.

'Oku 'uhinga 'eni 'a e sivi 'oku fai, koe'uhí 'oku 'i ai ha ngaahi bolt mo nut 'oku ngāue 'i he ngaahi nofononga 'oku ma'u lahi 'i ai 'a e ivi, pea kapau na'e 'ikai lava 'a e bolt 'o tauhi 'a e ivi 'oku 'i ai, mahalo na'e ma'u ha ngaahi fa'ahinga fakatu'utu'unu 'oku lave ai 'a e kaha'u 'o e ngaahi founga. 'Oku faka'ahu 'a e sivi 'aki ha ngaahi founga faka'ētekite 'oku fakahoko 'i he ngaahi misini sivi 'o e ivi, hange ko e machine 'o e tensile testing, 'a e misini 'o e hardness, 'a e founga 'o e salt spray, pea mo e ngaahi founga 'o e sivi kemikale. 'Oku toe fakahoko 'a e sivi 'o e founga 'o e material 'aki ha spectrometer ke 'ilo ai 'a e ivi 'o e carbon, chromium, nickel, molybdenum mo e ha fua, ke 'ilo ai 'oku liliu 'a e meykoloa 'o e fai 'o e bolt ki he pōpula 'oku tali 'i he 'usita faka'ētekite.

'I he founga fakatō'u 'o e sivi, 'oku ma'u ha tafa'aki 'o e bolt mo nut 'a e langa'anga, 'oku faka'ai 'i he misini 'o e tensile, 'oku fakahoko 'a e fakatotolo 'o e ivi 'o e fakatō 'a e bolt ki hono ki he ivi 'oku totonu, 'oku sivi 'a e hardness 'i he taha 'o e founga Rockwell, Vickers, pea mo Brinell, 'oku sivi 'a e coating 'o e zinc 'i he ivi 'o e me'a 'oku fakapipiki 'i ai, pea 'oku sivi 'a e founga 'o e corrosion 'i he salt spray. 'I he bolt 'oku 'i ai 'a e thread, 'oku sivi 'a e founga 'o e 'usita 'o e thread 'aki ha gauge, 'oku sivi 'a e length, 'a e diameter 'o e shaft, 'a e width 'o ha 'a e nut, pea mo e thickness 'o ha washer. 'Oku faka'u 'a e ngaahi me'a kotoa pe 'oku 'ilo 'i he sivi 'i ha 'onga faka-lline 'oku 'i ai 'a e ngaahi nopa 'oku fa'u 'e he ngaahi tokotaha 'oku fai 'a e sivi.

'Oku 'i ai 'a ha fa'ahinga bolt kehekehe 'oku sivi 'aki 'a e ngaahi founga 'o e sivi 'oku faka'ahu 'i he 'usita faka'ētekite, hange ko e bolt 'o e ivi 8.8, 10.9, mo 12.9, ko e bolt 'oku fai 'i he stainless steel 304 mo 316, ko e bolt 'oku fai 'i he brass, 'i he aluminium, pea mo e bolt 'oku fai 'i he titanium. 'Oku fakahoko 'a e sivi 'aki 'a e ngaahi founga 'oku tali mo e 'usita 'oku ma'u 'a e langa'anga 'a e bolt mo e nut, 'o a'u ki hono pau 'oku 'a e ivi 'oku lava 'o ai 'a e bolt ki he 'usita 'oku ma'u 'i he founga 'oku fakatau 'i ai.

sivi bolt nut testing Ngaahi Me'angaue Sivi

  • Universal tensile testing machine – 'oku ngāue 'i he fakatotolo 'o e tensile strength, yield strength, proof load, pea mo e elongation 'o e bolt mo e nut.
  • Rockwell hardness tester – 'oku ngāue 'i he sivi 'o e surface hardness mo e core hardness 'o e bolt 'oku 'i ai 'a e heat treatment.
  • Vickers hardness tester – 'oku ngāue 'i he sivi 'o e hardness 'o e coating 'oku thin pea mo e case depth measurement.
  • Brinell hardness tester – 'oku ngāue 'i he sivi 'o e hardness 'o e meykoloa 'oku maheni 'oku 'i ai 'a e lahi 'o e softness.
  • Optical emission spectrometer – 'oku ngāue 'i he sivi 'o e chemical composition 'o e steel, stainless steel, brass, aluminium, pea mo e alloy.
  • Metallographic microscope – 'oku ngāue 'i he sivi 'o e microstructure, grain size, decarburization, pea mo e inclusion rating.
  • Salt spray test chamber – 'oku ngāue 'i he sivi 'o e corrosion resistance 'o e coating 'i he neutral salt spray environment.
  • Torque testing machine – 'oku ngāue 'i he sivi 'o e stripping torque, prevailing torque, pea mo e torque-tension relationship.
  • Thread gauge set – 'oku ngāue 'i he inspection 'o e thread 'o e bolt mo e nut ke 'ilo ai 'oku tali 'a e dimensional tolerance.
  • Coordinate measuring machine – 'oku ngāue 'i he sivi 'o e dimension 'oku complicated 'o e bolt, hange ko e position 'o e hole mo e profile 'o e head.
  • Coating thickness gauge – 'oku ngāue 'i he sivi 'o e thickness 'o e zinc coating mo e coating 'oku 'i he surface 'o e bolt.
  • Impact testing machine – 'oku ngāue 'i he sivi 'o e impact toughness 'o e meykoloa 'i he vevela 'oku maheni.
  • Fatigue testing machine – 'oku ngāue 'i he sivi 'o e fatigue life 'o e bolt 'i he loading cycle 'oku cyclical.
  • Hydrogen embrittlement test fixture – 'oku ngāue 'i ha sustained load test ke 'ilo ai 'a e founga 'o e high strength bolt ki he hydrogen embrittlement.
  • Wedge tensile fixture – 'oku ngāue 'i he sivi 'o e head soundness 'o e bolt 'aki ha wedge angle 'oku totonu.
  • Surface roughness tester – 'oku ngāue 'i he sivi 'o e roughness 'o e bearing surface mo e thread surface.
  • Measuring projector – 'oku ngāue 'i he sivi 'o e dimension 'o e thread profile pea mo e radius 'o e thread root.
  • X-ray fluorescence analyzer – 'oku ngāue 'i he sivi 'o e coating composition pea mo e coating weight 'oku 'ikai ne fakamālōhi'i 'a e sample.

Ngaahi Me'a Sivi

  • Tensile strength – 'oku fai 'a e sivi ke 'ilo ai 'a e ivi 'oku ai 'a e bolt kae ma'u ai 'a e breaking, ko e parameter 'oku fakavahevahe 'i he ngaahi property class.
  • Yield strength – 'oku fai 'a e sivi ke 'ilo ai 'a e ivi 'a e point 'oku kamata ai 'a e plastic deformation, 'oku ngāue 'i he founga 'o e design.
  • Proof load – ko e ivi 'oku totonu ke 'i he bolt 'o 'ikai ma'u 'a e permanent deformation, ko e parameter 'oku sivi'i 'i he nut pea mo e bolt.
  • Hardness Rockwell – 'oku fai 'a e sivi ke 'ilo ai 'a e founga 'o e meykoloa ke resist 'a e indentation, 'oku ngāue 'i he surface mo e core hardness.
  • Hardness Vickers – 'oku fai 'a e sivi 'aki 'a e indenter 'oku fai 'i he diamond, 'oku ngāue 'i he ngaahi coating 'oku thin pea mo e case depth.
  • Hardness Brinell – 'oku fai 'a e sivi 'aki 'a e ball indenter, 'oku ngāue 'i he ngaahi meykoloa 'oku maheni 'oku 'ikai ma'u lahi 'a e hardness.
  • Decarburization depth – 'oku fai 'a e sivi ke 'ilo ai 'a e lahi 'o e layer 'oku 'ikai 'i ai 'a e carbon 'i he surface 'o e thread, 'oku afehANGi 'a e fatigue strength.
  • Carburization depth – 'oku fai 'a e sivi ke 'ilo ai 'a e lahi 'o e layer 'oku ma'u 'a e carbon, 'oku ne fakamālōhi'i 'a e hardness 'o e surface.
  • Elongation – 'oku fai 'a e sivi ke 'ilo ai 'a e founga 'o e meykoloa ke stretch kae 'ikai kovi, ko e parameter 'oku fakavahevahe 'i he ductility.
  • Reduction of area – 'oku fai 'a e sivi ke 'ilo ai 'a e ductility 'oku ne fa'u 'i he point 'o e fracture, 'oku fakahoko 'i he tensile test.
  • Thread shear strength – 'oku fai 'a e sivi ke 'ilo ai 'a e ivi 'oku ai 'a e thread 'o e nut kae 'ikai ai 'a e failure, ko e parameter 'oku sivi'i 'i he nut.
  • Stripping torque – 'oku fai 'a e sivi ke 'ilo ai 'a e torque 'oku ai 'a e thread, 'oku ngāue 'i he self-tapping screw pea mo e nut.
  • Prevailing torque – 'oku fai 'a e sivi ke 'ilo ai 'a e torque 'oku ma'u 'i he founga 'o e lock nut 'i he taimi 'oku fakatōnusi 'a e nut, ko e parameter 'o e nyloc nut.
  • Torque-tension relationship – 'oku fai 'a e sivi ke 'ilo ai 'a e coefficient 'o friction 'i he thread mo e bearing surface, 'oku ne fakamālōhi'i 'a e preload.
  • Coating thickness – 'oku fai 'a e sivi ke 'ilo ai 'a e thickness 'o e zinc coating mo e coating, 'oku afehANGi 'a e corrosion resistance.
  • Coating adhesion – 'oku fai 'a e sivi ke 'ilo ai 'a e founga 'o e coating ke pipiki 'i he meykoloa, 'oku fai 'aki ha bend test mo e tape test.
  • Salt spray resistance – 'oku fai 'a e sivi ke 'ilo ai 'a e taimi 'oku lava ke tauhi 'a e coating 'i he enevironment 'oku 'i ai 'a e salt, 'oku fai 'i he neutral salt spray chamber.
  • Chemical composition – 'oku fai 'a e sivi ke 'ilo ai 'a e elements 'oku 'i ai 'i he meykoloa, hange ko e carbon, chromium, nickel, molybdenum, 'oku sivi 'aki ha spectrometer.
  • Microstructure – 'oku fai 'a e sivi ke 'ilo ai 'a e grain structure mo e phase 'oku 'i ai, 'oku fakamālōhi'i 'a e heat treatment quality.
  • Grain size – 'oku fai 'a e sivi ke 'ilo ai 'a e lahi 'o e grain 'oku 'i ai 'i he meykoloa, 'oku afehANGi 'a e strength pea mo e toughness.
  • Hydrogen embrittlement – 'oku fai 'a e sivi ke 'ilo ai 'a e founga 'o e meykoloa ke 'ikai kovi 'i he hydrogen 'oku ma'u 'i he electroplating, 'oku sivi'i 'i he high strength bolt.
  • Head soundness – 'oku fai 'a e sivi ke 'ilo ai 'a e founga 'o e ulu 'o e bolt ke 'ikai se, 'oku fai 'aki ha head impact test.
  • Wedge tensile test – 'oku fai 'a e sivi 'aki ha wedge 'oku tu'u 'i he lalo 'o e ulu ke fakamālōhi'i 'a e ductility 'o e head.
  • Dimension inspection – 'oku fai 'a e sivi 'o e body diameter, 'a e length, 'a e thread length, 'a e head height, pea mo e width across flats.
  • Thread gauge inspection – 'oku fai 'a e sivi 'aki ha go/no-go gauge ke 'ilo ai 'oku liliu 'a e thread 'o e bolt ki he nut.
  • Fatigue strength – 'oku fai 'a e sivi ke 'ilo ai 'a e founga 'o e bolt ke tauhi 'a e loading cycle 'oku totonu, 'oku ngāue 'i he ngaahi application 'oku cyclical.
  • Impact toughness – 'oku fai 'a e sivi ke 'ilo ai 'a e energy 'oku ma'u 'i he fracture 'i he low temperature, 'oku sivi'i 'i he ngaahi meykoloa 'oku ngāue 'i he vevela 'oku ma'u mai 'i he tonga.

Ngaahi Fehu'i Masani

'E fiha 'a e taimi 'oku ma'u ai 'a e nopa sivi 'o e sivi bolt nut testing?

'Oku hanga 'a e taimi 'o e sivi bolt nut testing 'i he ngaahi 'aho 'e 7 ki he 15 'o e nga'ahi 'aho 'o ngāue, 'o hanga 'i he fika 'o e ngaahi me'a sivi 'oku kovi 'i ai 'a e langa'anga pea mo e founga 'o e sample. Kapau 'oku sivi 'a e tensile strength, hardness, pea mo e dimension taha pe, mahelu 'a e sivi 'i he 'aho 'e 7 ki he 10. Kapau 'oku 'i ai 'a e salt spray test 'oku ma'u ai 'a e ngaahi 'aho 'e 24 ki he 72 'o e exposure, pe kapau 'oku 'i ai 'a e hydrogen embrittlement sustained load test 'oku ma'u ai 'a e ngaahi 'aho 'e 12 ki he 48, mahelu 'a e taimi tatau 'o e sivi ki he ngaahi 'aho 'e 15. 'Oku toe ma'u 'a e taimi 'o e sample preparation pea mo e metallographic sample preparation 'oku 'i ai 'a e ngaahi 'aho 'e 2 ki he 3.

'E fiha 'a e totongi 'o e sivi bolt nut testing?

'Oku fakavahevahe 'a e totongi 'o e sivi bolt nut testing 'i he fika 'o e ngaahi me'a sivi 'oku fili 'e he customer. Kapau 'oku sivi taha pe 'a e tensile strength pe 'a e hardness, 'oku ma'u 'a e totongi 'oku si'isi'i. Kapau 'oku 'i ai 'a e chemical composition analysis, 'a e metallographic examination, 'a e salt spray test, mo e ngaahi me'a sivi 'oku lahi ange, 'oku ma'u 'a e totongi 'oku lahi ange. 'Oku lava ke ma'u 'a e tohi totongi 'oku fakamatala'i 'i ai 'a e fika 'o e ngaahi me'a sivi mo e totongi 'i he ngāue 'a e tokotaha 'oku fai 'a e sivi, pea 'oku lava 'o 'ilo 'i he ngaahi founga kelekele 'oku 'i ai 'a e tokotaha 'oku fai 'a e sivi.

'Oku 'i ai ha ngaahi me'a 'o e sivi bolt nut testing 'e fekau'aki mo e bolt mo e nut?

'Oku hanga 'a e ngaahi me'a sivi 'o e sivi bolt nut testing 'i he fa'ahinga 'o e meykoloa pea mo e 'usita 'oku tali 'i ai. Mo e carbon steel bolt 'oku 'i ai 'a e property class, 'oku sivi 'a e tensile strength, yield strength, proof load, hardness, elongation, reduction of area, decarburization, pea mo e chemical composition. Mo e stainless steel bolt, 'oku sivi 'a e chemical composition, 'a e intergranular corrosion, 'a e salt spray resistance, pea mo e mechanical properties. Mo e nut, 'oku sivi 'a e proof load, 'a e stripping strength 'o e thread, 'a e hardness, pea mo e prevailing torque ki he lock nut. Mo e coating, 'oku sivi 'a e coating thickness, 'a e adhesion, 'a e salt spray resistance, pea mo e hydrogen embrittlement. Mo e structural bolt set, 'oku sivi 'a e preload, 'a e slip factor 'o e faying surface, pea mo e torque-tension relationship.

'E fiha 'a e sample 'oku totonu ke fakamaike 'i he sivi bolt nut testing?

'Oku totonu ke fakamaike 'a e bolt pe nut 'e 8 ki he 15 'a e fika 'i he tafa'aki 'o ha fa'ahinga 'oku sivi, 'oku a'u ki he founga 'o e sivi 'oku fili. Ki he tensile test mo e proof load test, 'oku fiha 'a e bolt 'e 3 ki he 5 ke lava 'a e test mo e repeat. Ki he hardness test, 'oku fiha 'a e bolt 'e 3 ke lava 'a e test 'i he ngaahi point 'oku lahi. Ki he chemical composition 'oku ngāue 'aki ha spectrometer, 'oku fiha 'a e sample taha pe 'e ua 'oku 'i ai 'a e surface 'oku māsiva. Ki he metallographic test, 'oku fiha 'a e sample 'oku 'i ai 'a e cross-section. 'Oku fiha 'i he salt spray test 'a e sample 'oku 'ikai ngāue'i, 'oku 'i ai 'a e coating 'o 'ikai toutou. 'Oku fiha 'a e length 'o e bolt sample 'oku ma'u 'a e shaft 'oku lava 'o hold 'i he machine grip.

Laupā 'o e Sivi

  • Bolt 'o e ivi 8.8 – ko e fa'ahinga bolt 'oku ngāue 'i he ngaahi palesi 'oku ma'u 'i ai 'a e ivi 'oku loto mo e lahi, 'oku sivi 'a e tensile strength, yield strength, pea mo e elongation.
  • Bolt 'o e ivi 10.9 – ko e bolt 'oku ma'u 'a e ivi 'oku lava 'o ngāue 'i he ngaahi nofononga 'oku ma'u lahi 'i ai 'a e ivi, 'oku sivi 'a e proof load pea mo e hardness.
  • Bolt 'o e ivi 12.9 – ko e bolt 'oku ma'u 'a e ivi 'oku sivi 'aki 'a e founga 'oku fakahoko 'i he ivi 'oku ma'u lahi, 'oku pau ke sivi 'a e surface hardness mo e core hardness.
  • Bolt 'o e stainless steel 304 – ko e bolt 'oku fa'u 'i he meykoloa 'oku 'i ai 'a e chromium mo nickel, 'oku sivi 'a e founga 'o e corrosion pea mo e composition 'o e kemikale.
  • Bolt 'o e stainless steel 316 – ko e bolt 'oku 'i ai 'a e molybdenum ke fakamalohi'i 'a e founga 'o e corrosion 'i he vai mo e kasa, 'oku sivi 'a e pitting resistance.
  • Bolt 'o e stainless steel 321 mo 347 – ko e fa'ahinga bolt 'oku ngaue 'i he vevela 'oku ma'u, 'oku sivi 'a e founga 'o e material 'i he vevela 'oku ma'u.
  • Nut 'o e hex – ko e fa'ahinga nut 'oku ngāue lahi 'i he ngaahi palesi 'o e founga 'o e fale, 'oku sivi 'a e proof load mo e thread 'o e nut.
  • Nut 'o heeavy hex – ko e nut 'oku ma'u 'a e width 'oku lahi 'i he 'usita 'oku sivi 'aki 'a e founga 'o e proof stress mo e stripping strength 'o e thread.
  • Nut 'o e nylon insert lock – ko e nut 'oku 'i ai 'a ha nylon insert ke 'oua ne, 'oku sivi 'a e torque-tension relationship mo e prevailing torque.
  • Nut 'o e all-metal lock – ko e nut 'oku 'i ai 'a e founga 'o e lock 'oku fai 'i he meykoloa, 'oku sivi 'a e reusability 'o e locking feature.
  • Nut 'o e flange – ko e nut 'oku 'i ai 'a e flange ke fakalave ai 'a e ivi, 'oku sivi 'a e bearing surface mo e proof load.
  • Nut 'o e wing – ko e nut 'oku fai 'a e founga 'o e hand-tight, 'oku sivi 'a e thread 'o e usability.
  • Nut 'o e cap mo e acorn – ko e nut 'oku uhi ai 'a e taha 'ao 'o e bolt, 'oku sivi 'a e dimension mo e coverage 'o e thread.
  • Bolt 'o e anchor – ko e bolt 'oku ngāue 'i he concrete, 'oku sivi 'a e pull-out resistance pea mo e tensile strength.
  • Bolt 'o e J-type mo e L-type – ko e bolt 'oku fakapipiki 'i he founga 'oku ngāue 'i he palesi 'o e fale, 'oku sivi 'a e bend radius pea mo e tensile strength.
  • Bolt 'o e U-bolt – ko e bolt 'oku fai 'a e founga 'o e U, 'oku sivi 'a e alignment 'o e thread mo e straightness.
  • Bolt 'o e stud mo e double-end – ko e bolt 'oku 'i ai 'a e thread 'i he ngaahi taha 'e ua, 'oku sivi 'a e thread length 'i he ngaahi 'ao 'e ua.
  • Bolt 'o e eye – ko e bolt 'oku 'i ai 'a e hole 'oku fatongi 'i ai 'a e ma, 'oku sivi 'a e proof load 'o e eye pea mo e deformation.
  • Bolt 'o e carriage – ko e bolt 'oku 'i ai 'a e square neck ke ta'e toki ai, 'oku sivi 'a e neck dimension mo e head strength.
  • Bolt 'o e socket head cap – ko e bolt 'oku 'i ai 'a e hex socket 'i he loto 'o e ulu, 'oku sivi 'a e socket depth mo e hardness.
  • Bolt 'o e flange – ko e bolt 'oku 'i ai 'a e flange 'i he lalo 'o e ulu, 'oku sivi 'a e bearing stress pea mo e tensile strength.
  • Bolt 'o e shoulder – ko e bolt 'oku 'i ai 'a e shaft 'oku 'ikai 'i ai 'a e thread, 'oku sivi 'a e shoulder diameter mo e tolerance.
  • Bolt 'o e T-head – ko e bolt 'oku ngāue 'i he ngaahi slot machine, 'oku sivi 'a e head width pea mo e shear strength.
  • Washer 'o e flat – ko e washer 'oku fakalave ai 'a e ivi, 'oku sivi 'a e hardness mo e thickness.
  • Washer 'o e spring – ko e washer 'oku fakamālōlo ai 'a e 'o e nut, 'oku sivi 'a e spring rate mo e elasticity.
  • Washer 'o e wedge – ko e washer 'oku ngāue mo e bolt 'oku fai 'a e proof load test, 'oku sivi 'a e wedge angle mo e tensile strength.
  • Bolt 'oku fai 'i he brass mo e bronze – ko e bolt 'oku ngāue 'i he ngaahi founga 'oku 'i ai 'a e vai mo e kemikale, 'oku sivi 'a e composition 'o e copper alloy.
  • Bolt 'oku fai 'i he aluminium – ko e bolt 'oku ma'u 'a e taha 'oku 'o e weight, 'oku sivi 'a e tensile strength pea mo e shear strength.
  • Bolt 'oku fai 'i he titanium – ko e bolt 'oku ngāue 'i he ngaahi founga 'o e aerospace mo e vehicle, 'oku sivi 'a e fatigue strength pea mo e composition.
  • Bolt 'oku fai 'i he high-temperature alloy – ko e bolt 'oku ngāue 'i he vevela 'oku ma'u lahi, 'oku sivi 'a e creep resistance pea mo e stress rupture.
  • Bolt 'oku fai 'a e coating 'o e hot-dip galvanized – ko e bolt 'oku uhi 'i he zinc 'oku lulu, 'oku sivi 'a e thickness 'o e coating pea mo e adhesion.
  • Bolt 'oku fai 'a e coating 'o e zinc plated – ko e bolt 'oku uhi 'i he zinc 'i he founga 'o electroplating, 'oku sivi 'a e coating thickness mo e salt spray resistance.
  • Bolt 'oku fai 'a e coating 'o e dacromet mo e geomet – ko e bolt 'oku uhi 'i he coating 'oku malohi 'i he corrosion, 'oku sivi 'a e coating weight pea mo e neutral salt spray performance.
  • Bolt 'oku fai 'a e coating 'o e PTFE mo e Xylan – ko e bolt 'oku 'i ai 'a e coating 'oku fakaiti'i 'a e friction, 'oku sivi 'a e coefficient 'o friction pea mo e torque-tension relationship.
  • Bolt mo e nut 'o e structural 'oku ngāue 'i he founga 'o e steel – ko e bolt mo nut 'oku ngāue 'i he ngaahi founga 'o e fale 'oku fai 'i he steel, 'oku sivi 'a e preload capacity, 'a e slip factor test 'o e faying surface, pea mo e tension 'oku lava 'o ngāue 'aki.

Fakatatala

'Oku a'u 'a e sivi bolt nut testing ki hono sivi 'o e tensile strength, yield strength, proof load, hardness, elongation, chemical composition, coating thickness, salt spray resistance, thread dimension, pea mo e ngaahi parameter 'o e mechanical mo e material properties 'oku 'i he bolt, nut, mo e washer 'oku sivi. 'Oku fakahoko 'a e sivi 'i he ngaahi fa'ahinga bolt mo nut 'oku kehekehe, mei he carbon steel bolt 'o e property class 8.8 ki he 12.9, ki he stainless steel, brass, aluminium, titanium, pea mo e high-temperature alloy, 'o a'u ki he ngaahi coating 'oku kehekehe. 'Oku ma'u 'a e nopa sivi 'i he ngaahi 'aho 'e 7 ki he 15 'o ngāue, 'o hanga 'i he fika 'o e ngaahi me'a sivi 'oku fili 'e he customer pea mo e founga 'o e sample.

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