Ite 8.8 Hex Bolts

2026-08-03

1. ite 8.8 - Alabọde-High Agbara Fastener Class

1.1 Yiyipada awọn 8.8 yiyan

Siṣamisi “8.8” jẹ yiyan kilasi ohun-ini ti asọye nipasẹ ISO 898-1, boṣewa agbaye ti n ṣakoso awọn ohun-ini ẹrọ ti erogba, irin ati awọn ohun elo irin alloy. Eto oni-nọmba meji n ṣe koodu awọn aye-ọna ẹrọ bọtini meji:

● Nọmba akọkọ (8): Tọkasi idamẹwa ti agbara fifẹ ipin ni megapascals → 8 × 100 = 800 MPa agbara fifẹ to kere julọ.

● Nọmba keji (.8): Ṣe afihan ipin ikore → 0.8 × 800 = 640 MPa agbara ikore ti o kere julọ.

Ite 8.8 fasteners ni awọn julọ o gbajumo ni lilo gbogbo-idi igbekale fasteners agbaye, ibora hex boluti, hex fila skru, gbigbe boluti, okunrinlada bolts, ati ni kikun asapo skru fun irin ikole, Oko awọn apejọ, ati gbogbo ẹrọ.

olusin 1. ite 8.8 hex boluti pẹlu ohun ini kilasi siṣamisi

1.2 darí Properties

Ite 8.8 fasteners ti wa ni ti ṣelọpọ lati alabọde erogba, irin ati ki o faragba quenching ati tempering (Q&T) lati se aseyori awọn ti a beere darí išẹ. Awọn ohun-ini pataki fun ISO 898-1:

Ohun ini	Iye	Ẹyọ
Agbara Fifẹ Kere (Rm)	800	MPa
Agbara ikore ti o kere julọ (ReL)	640	MPa
Ilọsiwaju ti o kere ju lẹhin Egugun	≥ 12	%
Lile Core (HV)	250–310	HV
Aṣoju Q&T Lile (HRC)	22–32	HRC
Iforukọsilẹ Bolt Diamita Range	M5 – M39	mm

Table 1. Key darí-ini ti ite 8.8 fasteners fun ISO 898-1

1.3 Awọn ohun elo ti a ṣe iṣeduro

Yiyan ohun elo aise ti o pe ni ipilẹ ti iṣelọpọ ti o ni igbẹkẹle Ite 8.8 fasteners. Awọn irin wọnyi, ni idapo pẹlu Q&T to tọ, ṣaṣeyọri iṣẹ ṣiṣe Ite 8.8 deede:

● 35# Alabọde-Erogba Irin - Dara fun awọn fasteners iwọn ila opin kekere (≤ M16). Iye owo-doko, líle deedee lẹhin Q&T.

● 45 # Alabọde-erogba Irin - Aṣayan olokiki julọ fun awọn boluti hex 8.8 ati awọn boluti okunrinlada. Ẹrọ ti o dara, awọn ohun-ini ẹrọ iduroṣinṣin lẹhin Q&T.

● 40Cr Alloy Steel - Ayanfẹ fun awọn boluti-iwọn ila opin nla (M20+). Afikun Chromium ṣe imudara lile ati iṣọkan fifẹ kọja awọn apakan agbelebu.

1.4 Ite lafiwe

Ipele	Fifẹ (MPa)	Ipese (MPa)	Awọn ohun elo ti a ṣe iṣeduro
4.6	400	240	Kekere erogba irin, ti kii-ooru-mu
4.8	420	340	Kekere erogba irin, tutu-ṣiṣẹ
8.8	800	640	35 # / 45 # Erogba Irin, 40Cr Alloy Irin; 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. Wọpọ Fastener ini kilasi ati niyanju ohun elo

2. Hex boluti - Awọn julọ wapọ Fastener

2.1 Kini Hex Bolt?

Bọlu hex kan (boluti ori hexagonal) jẹ ohun ti o tẹle ara pẹlu ori apa mẹfa, ti a ṣe lati fi sii nipasẹ awọn ihò ninu awọn ẹya ti o pejọ ati ni ifipamo nipasẹ eso ibarasun. geometry hexagonal ngbanilaaye wrench tabi ilowosi iho lati awọn igun pupọ, ti o jẹ ki o wulo julọ ati iru boluti ti a lo kaakiri gbogbo awọn ile-iṣẹ. Awọn iyatọ akọkọ meji wa:

● Hex Bolt (ISO 4014 / DIN 931) - Iwọn apakan: apakan shank ti a ko ka ti n pese agbara irẹwẹsi ati titete, o dara fun awọn asopọ iṣeto.

● Hex Cap Screw (ISO 4017 / DIN 933) - Asopọ ni kikun: awọn okun nṣiṣẹ gbogbo ipari, ti o baamu fun awọn ohun elo ti o nilo ifarapọ okun ti o pọju.

olusin 2. Anatomi ti a hex bolt — bọtini igbekale eroja

2.2 Wọpọ Hex Bolt Orisi & Awọn iyatọ

● Hex Head Bolt / Cap Screw - Standard ori ẹgbẹ mẹfa; julọ wapọ, lo ninu ikole, ẹrọ, Oko.

● Hex Flange Bolt - Aṣọpọ ifoso-bi flange labẹ ori; sepin fifuye dimole, imukuro lọtọ ifoso.

● Heavy Hex Bolt (ASTM A325) - Ori ti o tobi julọ fun awọn asopọ irin ti iṣeto; pato ninu North American awọn ajohunše.

● Hex Lag Bolt / Carriage Bolt - Awọn iyatọ pataki fun igi-si-irin ati awọn asopọ igi.

2.3 wọpọ titobi & amupu

Iwọn	ipolowo	Wrench	Ori dia.	Ori ht.	Shank dia.	Iwọn Gigun
M6	1.0	10 mm	10.0	4.0	6.0	16–60
M8	1.25	13 mm	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	18.0	7.5	12.0	30–120
M16	2.0	24 mm	24.0	10.0	16.0	40–150
M20	2.5	30 mm	30.0	12.5	20.0	50–200
M24	3.0	36 mm	36.0	15.0	24.0	60–240

Tabili 3. Ite 8.8 hex bolt mefa fun ISO 4014 / ISO 4017

3. Ite 8.8 Hex Bolts - Aṣayan & Ohun elo

3.1 dada Awọn itọju

Aṣayan itọju oju da lori agbegbe iṣẹ ati awọn ibeere aabo ipata. Awọn aṣayan ti o wọpọ fun Ite 8.8 hex boluti pẹlu:

● Zinc Plating (Electroplated) - Ti ọrọ-aje, iduroṣinṣin ipata; boṣewa wun fun abe ile ati ìwọnba ayika.

● Gbona-Dip Galvanizing - Iwọn zinc ti o nipọn fun ita gbangba ati ifihan oju omi; nbeere oversize tapped eso.

● Dacromet Coating - Chromium-free, ilana ore ayika; superior iyọ-sokiri resistance lai hydrogen embrittlement ewu. Apẹrẹ fun Oko ati igbekale ohun elo.

● Ruspert Coating - Organic-Layer Organic / zinc composite; o tayọ oju ojo, commonly pato ni Japanese ise awọn ajohunše.

3.2 fifi sori Itọsọna

● Lo awọn eso Ipele 8 ti o baamu fun ibamu agbara okun.

● Waye iyipo titọpa pato fun iwe data olupese; lori-tightening ewu boluti ikuna.

● Lubricate awọn okun ṣaaju ohun elo iyipo — olùsọdipúpọ edekoyede ni pataki ni ipa lori iṣaju iṣaju ti o ṣaṣeyọri.

● Rii daju pe o kere ju okun kan ti o ni kikun yọ jade ni ikọja oju nut lẹhin ti o di.

● Yago fun atunlo ite 8.8 boluti ni awọn asopọ igbekale to ṣe pataki lẹhin iṣaju iṣaju iyipo kikun.

3.3 Awọn ajohunše & Iwe-ẹri

Awọn boluti hex 8.8 ti ṣelọpọ ati idanwo ni ibamu pẹlu:

TS EN ISO 898-1 - Awọn ohun-ini ẹrọ ti awọn fasteners ti a ṣe ti irin erogba ati irin alloy.

● ISO 4014 - Awọn boluti hex pẹlu shank apa kan (awọn iwọn).

● ISO 4017 - Awọn skru fila Hex pẹlu okun kikun (awọn iwọn).

● Awọn iwe-ẹri idanwo ohun elo ni kikun (MTC) fun EN 10204 3.1 ti o wa lori ibeere.

Awọn ọna Reference

Ipele	Awọn ohun elo ti a ṣe iṣeduro	Wọpọ ọja Orisi	Ooru Itọju
8.8	35 # / 45 # Erogba Irin 40Cr Alloy Irin	Hex Bolt, Hex fila dabaru, gbigbe Bolt, okunrinlada Bolt	Quenching & Tempering