Matsayi 8.8 Hex Bolts

2026-08-03

1. Grade 8.8 - Matsakaici-High ƙarfi Fastener Class

1.1 Yanke Zayyana 8.8

Alamar "8.8" shine ƙirar ajin kaddarorin da aka ayyana ta ISO 898-1, ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun kayan aikin injiniya na ƙarfe na carbon da gami karfe. Tsarin lambobi biyu ya ƙunshi maɓalli na inji guda biyu:

● Lamba na farko (8): Yana nuna kashi ɗaya cikin goma na ƙarfin ƙaƙƙarfan ƙima a cikin megapascals → 8 × 100 = 800 MPa mafi ƙarancin ƙarfi.

● Lambobi na biyu (.8): Yana wakiltar rabon amfanin ƙasa → 0.8 × 800 = 640 MPa ƙaramar ƙarfin yawan amfanin ƙasa.

Fate 8.8 fasteners su ne mafi yadu amfani da janar-manufa tsarin fasteners a duk duniya, rufe hex kusoshi, hex hula sukurori, karusa kusoshi, ingarma bolts, da kuma cikakken threaded sukurori don karfe yi, mota taro, da kuma janar injuna.

Hoto 1. Matsayi 8.8 hex bolts tare da alamar ajin dukiya

1.2 Kayayyakin Injini

Grade 8.8 fasteners ana kerarre daga matsakaici carbon karfe da kuma sha quenching da tempering (Q&T) cimma da ake bukata inji yi. Mahimman kaddarorin bisa ga ISO 898-1:

Dukiya	Daraja	Naúrar
Ƙarfin Ƙarfin Ƙarfi (Rm)	800	MPa
Ƙarfin Ƙarfin Ƙarfin Haɓaka (ReL)	640	MPa
Karancin Tsawaitawa bayan Karya	≥ 12	%
Core Hardness (HV)	250-310	HV
Yawan Q&T Hardness (HRC)	22-32	HRC
Rage Diamita na Bolt	M5-M39	mm

Teburin 1. Maɓalli na injiniyoyi na masu haɗe-haɗe na Grade 8.8 ta ISO 898-1

1.3 Abubuwan Shawarwari

Zaɓin madaidaicin ɗanyen abu shine ginshiƙin samar da ingantattun kayan ɗamara na Grade 8.8. Ƙarfe masu zuwa, haɗe tare da Q&T da suka dace, suna cimma daidaitaccen aikin Grade 8.8:

● 35# Matsakaici-Carbon Karfe - Ya dace da ƙaramin diamita fasteners (≤ M16). Tasiri mai tsada, isasshiyar taurin bayan Q&T.

● 45# Matsakaici-Carbon Karfe - Mafi mashahuri zaɓi don ƙwanƙwasa hex 8.8 da kusoshi. Kyakkyawan machinability, barga na inji Properties bayan Q&T.

● 40Cr Alloy Karfe - An fi so don manyan kusoshi na diamita (M20+). Ƙarin Chromium yana haɓaka tauri da daidaituwar ɗaure a tsakanin sassan giciye.

1.4 Kwatancen Daraja

Daraja	Tensile (MPa)	Haihuwa (MPa)	Abubuwan da aka Shawarar
4.6	400	240	Low carbon karfe, wanda ba zafi magani
4.8	420	340	Low carbon karfe, sanyi-aiki
8.8	800	640	35 # / 45 # Karfe Karfe, 40Cr Alloy Karfe; Q&T
10.9	1,040	940	40Cr, 35CrMo, 42CrMo, SCM435; Q&T
12.9	1,220	1,100	42CrMo4 / SCM440, 35CrMoV; Q&T 39-44 HRC

Table 2. Common fastener dukiya azuzuwan da shawarar kayan

2. Hex Bolts - Mafi Maɗaukakiyar Fastener

2.1 Menene Hex Bolt?

Kullin hex (kullin kai hexagonal) ɗigon zaren zare ne tare da kai mai gefe shida, wanda aka ƙera don sanya shi ta cikin ramuka a cikin sassan da aka haɗa kuma a kiyaye shi ta hanyar kwaya. Geometry mai lamba hexagonal yana ba da damar haɗin kai ko soket daga kusurwoyi da yawa, yana mai da shi mafi amfani da nau'in kusoshi a duk masana'antu. Akwai manyan bambance-bambancen guda biyu:

● Hex Bolt (ISO 4014 / DIN 931) - Sashe na zaren: wani ɓangaren shank wanda ba a karanta shi ba yana ba da ƙarfin ƙarfi da daidaitawa, manufa don haɗin ginin.

● Hex Cap Screw (ISO 4017 / DIN 933) - Cikakken zaren: zaren suna gudanar da tsayin duka, dace da aikace-aikacen da ke buƙatar mafi girman haɗin zaren.

Hoto 2. Anatomy na hex bolt - maɓalli na tsarin abubuwa

2.2 Nau'in Hex Bolt gama gari & Bambance-bambance

● Hex Head Bolt / Cap Screw - Daidaitaccen kai mai gefe shida; mafi m, amfani da gini, inji, mota.

● Hex Flange Bolt - Haɗe-haɗe-haɗe kamar flange a ƙarƙashin kai; yana rarraba nauyin matsi, yana kawar da mai wanki daban.

● Heavy Hex Bolt (ASTM A325) - Babban shugaban don haɗin ginin ƙarfe; ƙayyadaddun ƙa'idodin Arewacin Amurka.

● Hex Lag Bolt / Carriage Bolt - Daban-daban na musamman don haɗin katako da katako.

2.3 Gabaɗaya Masu Girma & Girma

Girman	Fita	Wuta	Head diya.	Shugaban ht.	Shank da.	Tsawon Tsayin
M6	1.0	10 mm	10.0	4.0	6.0	16-60
M8	1.25	13 mm ku	13.0	5.3	8.0	20-80
M10	1.5	16 mm	16.0	6.4	10.0	25-100
M12	1.75	18 mm ku	18.0	7.5	12.0	30-120
M16	2.0	mm24 ku	24.0	10.0	16.0	40-150
M20	2.5	mm 30	30.0	12.5	20.0	50-200
M24	3.0	mm36 ku	36.0	15.0	24.0	60-240

Tebura 3. Matsayi 8.8 hex bolt girma ta ISO 4014 / ISO 4017

3. Grade 8.8 Hex Bolts - Zaɓi & Aikace-aikace

3.1 Jiyya na Sama

Zaɓin jiyya na saman ya dogara da yanayin aiki da buƙatun kariya na lalata. Zaɓuɓɓukan gama gari don bolts hex na Grade 8.8 sun haɗa da:

● Zinc Plating (Electroplated) - Tattalin arziki, matsakaicin juriya na lalata; daidaitaccen zaɓi na cikin gida da mahalli masu laushi.

● Hot-Dip Galvanizing - Tushen tutiya mai kauri don bayyanar waje da ruwa; yana buƙatar ƙwaya mai girma da yawa.

● Rufin Dacromet - Ba tare da Chromium ba, tsari na kare muhalli; mafi girman juriya na fesa gishiri ba tare da haɗarin haɓakar hydrogen ba. Mafi dacewa don aikace-aikacen motoci da tsarin tsari.

● Ruspert Coating - Layer uku-Layer / zinc composite; kyakkyawan yanayin yanayi, wanda aka saba kayyade a matsayin masana'antar Jafananci.

3.2 Jagorar Shigarwa

● Yi amfani da madaidaicin ƙwaya don dacewa da ƙarfin zaren.

● Aiwatar da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙira suke; wuce gona da iri yana haifar da gazawar kullewa.

● Sa mai zaren kafin aikace-aikacen karfin juzu'i - juzu'i mai mahimmanci yana tasiri sosai ga aikin da aka samu.

● Tabbatar cewa aƙalla cikakken zaren zare guda ɗaya ya fito sama da fuskar kwaya bayan an ɗaure shi.

● A guji sake yin amfani da bolts na digiri 8.8 a cikin haɗin gine-gine masu mahimmanci bayan ƙaddamar da cikakken karfin juyi.

3.3 Matsayi & Takaddun shaida

An kera bolts hex 8.8 kuma an gwada su daidai da:

TS EN ISO 898-1 Kayayyakin injina na kayan ɗamara da aka yi da ƙarfe na carbon da gami da ƙarfe.

TS EN ISO 4014 - Hex bolts tare da ɓangarorin zaren yanki (girman girma).

TS EN ISO 4017 - Hex hula sukurori tare da cikakken zaren (girman girma).

● Cikakken takaddun shaida na gwaji (MTC) ta EN 10204 3.1 akwai akan buƙata.

Saurin Magana

Daraja	Abubuwan da aka Shawarar	Nau'in Samfur gama gari	Maganin zafi
8.8	35# / 45# Carbon Karfe 40Cr Alloy Karfe	Hex Bolt, Hex Cap Screw, Carriage Bolt, Stud Bolt	Quenching & Haushi