Ọkwa 8.8 Hex Bolts

2026-08-03

1. Ọkwa 8.8 - Ọkara-Elu ike fastener Klas

1.1 Idozi nhọpụta 8.8

Akara “8.8” bụ ọkwa klaasị nke akọwapụtara ISO 898-1, ọkọlọtọ mba ụwa na-achịkwa akụrụngwa nke carbon steel na ihe nchara alloy. Sistemụ ọnụọgụ abụọ ahụ na-etinye akara nrụnye isi abụọ:

● Nkeji mbụ (8): Na-egosi otu ụzọ n'ụzọ iri nke ike tensile ọnụ na megapascals → 8 × 100 = 800 MPa kacha nta ike.

● Ọnụọgụ nke abụọ (.8): Na-anọchite anya oke mkpụrụ → 0.8 × 800 = 640 MPa ike mkpụrụ kacha nta.

Ọkwa 8.8 fasteners bụ ihe a na-ejikarị eme ihe n'ozuzu ya n'ụwa nile, na-ekpuchi bolts hex, hex cap skru, carriage bolts, stud bolts, na skru zuru ezu maka owuwu ígwè, mgbakọ ụgbọ ala, na igwe n'ozuzu.

Ọgụgụ 1. Ọkwa 8.8 hex bolts nwere akara klaasị ihe onwunwe

1.2 Ihe eji arụ ọrụ

A na-arụpụta ihe nrụnye ọkwa 8.8 site na ọkara carbon steel wee mebie na tempering (Q&T) iji nweta arụmọrụ igwe achọrọ. Njirimara ndị dị mkpa maka ISO 898-1:

Ngwongwo	Uru	Nkeji
Ike ntakiri kacha nta (Rm)	800	MPa
Ike Mbudata kacha nta (ReL)	640	MPa
Ntugharị kacha nta mgbe agbajichara	≥ 12	%
Isi ike ike (HV)	250–310	HV
Isi ike Q&T a na-ahụkarị (HRC)	22–32	HRC
Oke dayameta Bolt aha	M5-M39	mm

Isiokwu 1. Key n'ibu Njirimara nke Grade 8.8 fasteners kwa ISO 898-1

1.3 Ngwa ndị akwadoro

Ịhọrọ akụrụngwa ziri ezi bụ ntọala nke imepụta ihe nkwụnye ọkwa 8.8 a pụrụ ịdabere na ya. Nchara ndị a, jikọtara ya na Q&T kwesịrị ekwesị, rụpụta arụmọrụ ọkwa 8.8 na-agbanwe agbanwe:

● 35# Ọkara-Carbon Steel - Kwesịrị ekwesị maka ihe nkedo dị obere dayameta (≤ M16). Dị ọnụ ahịa, ike ike zuru oke mgbe Q&T gasịrị.

● 45# Ọkara Carbon Steel - Nhọrọ kachasị ewu ewu maka bolts hex 8.8 na stud. Ezi machinability, kwụsiri ike n'ibu Njirimara mgbe Q&T.

● 40Cr Alloy Steel - Achọtara maka bolts buru ibu (M20+). Mgbakwụnye Chromium na-eme ka ike siri ike na ịdị n'otu nhịahụ gafere n'ofe akụkụ.

1.4 Ntụnyere ọkwa

Ọkwa	Tensile (MPa)	Mpụta (MPa)	Ngwa ndị akwadoro
4.6	400	240	Igwe carbon dị ala, anaghị agwọ ya ọkụ
4.8	420	340	Igwe carbon dị ala, arụ ọrụ oyi
8.8	800	640	35# / 45# Carbon Steel, 40Cr Alloy Steel; Ajụjụ&T
10.9	1,040	940	40Cr, 35CrMo, 42CrMo, SCM435; Ajụjụ&T
12.9	1,220	1,100	42CrMo4 / SCM440, 35CrMoV; Ajụjụ&T 39–44 HRC

Tebụl 2. klaasị ihe onwunwe fastener na ihe ndị akwadoro

2. Hex Bolts - Nke kachasị ngwa ngwa ngwa ngwa

2.1 Gịnị bụ Hex Bolt?

Ihe mkpuchi hex (bolt isi hexagonal) bụ eriri eriri nwere isi nwere akụkụ isii, nke emebere ka etinye ya site na oghere n'akụkụ akụkụ gbakọtara wee chekwaa ya site na akị mating. Geometry hexagonal na-enye ohere ntinye aka ma ọ bụ oghere site n'akụkụ dị iche iche, na-eme ka ọ bụrụ ụdị bolt kachasị dị irè na nke a na-ejikarị eme ihe n'ofe ụlọ ọrụ niile. Isi ụdị abụọ dị:

● Hex Bolt (ISO 4014 / DIN 931) - Akụkụ akụkụ nke eriri: akụkụ shank na-enweghị eriri na-enye ike na nhazi, dị mma maka njikọ nhazi.

● Hex Cap Screw (ISO 4017 / DIN 933) - Edebere zuru oke: eriri na-agba ọsọ ogologo oge niile, dabara maka ngwa chọrọ ntinye aka kacha elu.

Ọgụgụ 2. Anatomi nke hex bolt - isi ihe nhazi

2.2 Ụdị Hex Bolt nkịtị & Ụdị

● Hex Head Bolt / Cap Screw - ọkọlọtọ isi akụkụ isii; kasị vasatail, eji na-ewu, ígwè, ụgbọala.

● Hex Flange Bolt - Ngwakọta ihe nkedo dị ka flange n'okpuru isi; na-ekesa ibu mwekota, na-ewepụ ihe washer dị iche iche.

● Heavy Hex Bolt (ASTM A325) - Nnukwu isi maka njikọ nchara nhazi; akọwapụtara na ụkpụrụ North America.

● Hex Lag Bolt / Carriage Bolt - Ụdị dị iche iche maka njikọ osisi na ígwè na osisi.

2.3 Nha na akụkụ

Nha	Mgbapụta	Wrench	Isi dia.	Isi ht.	Shank dia.	Ogologo Ogologo
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

Tebụl 3. Ọkwa 8.8 hex bolt akụkụ kwa ISO 4014 / ISO 4017

3. Ọkwa 8.8 Hex Bolts - Nhọrọ & Ngwa

3.1 Ọgwụgwọ dị n'elu

Nhọrọ ọgwụgwọ elu na-adabere na gburugburu ebe ọrụ yana ihe nchebe corrosion chọrọ. Nhọrọ ndị a na-ahụkarị maka bolts 8.8 hex gụnyere:

● Zinc Plating (Electroplated) - Akụ na ụba, nguzogide corrosion na-agafeghị oke; nhọrọ ọkọlọtọ maka ime ụlọ na gburugburu dị nro.

● Hot-Dip Galvanizing - Nnukwu mkpuchi zinc maka ikpughe n'èzí na mmiri; chọrọ nnukwu mkpụrụ akụ.

● mkpuchi dacromet - Chromium na-enweghị chromium, usoro enyi na gburugburu ebe obibi; Nguzogide nfe nnu ka elu na-enweghị ihe egwu mgbaka hydrogen. Kwesịrị ekwesị maka ngwa ụgbọ ala na nhazi.

● mkpuchi Ruspert - ihe mejupụtara organic / zinc mejupụtara atọ; ezigbo ihu igwe, nke akọwapụtara n'ụkpụrụ ụlọ ọrụ Japan.

3.2 Ntuziaka nwụnye

● Jiri mkpụrụ nke klas 8 dabara adaba maka ndakọrịta ike eri.

● Tinye torque a kapịrị ọnụ maka mpempe data nke onye nrụpụta; ihe egwu na-eme ka ọ dị ike karịa ọdịda bolt.

● Rie eri tupu ngwa torque - ọnụọgụ esemokwu na-emetụta nke ọma tupu ibu ibu.

● Gbaa mbọ hụ na opekata mpe otu eri zuru oke gafechara ihu akị ka emechie ya.

● Zenarị iji bolts ọkwa 8.8 dị mkpa na njikọ nhazi dị oke mkpa mgbe ebuchara ihe zuru oke.

3.3 Ụkpụrụ & Asambodo

A na-arụpụta ma nwalee ọkwa 8.8 hex bolts dịka:

TS EN ISO 898-1 akụrụngwa akụrụngwa nke ihe nkedo nke carbon steel na alloy steel.

● ISO 4014 - Hex bolts nwere eriri eriri akụkụ (akụkụ).

● ISO 4017 - Hex okpu kposara na eri zuru oke (akụkụ).

● Asambodo ule ihe zuru oke (MTC) maka EN 10204 3.1 dị mgbe achọrọ ya.

Ntuziaka ngwa ngwa

Ọkwa	Ngwa ndị akwadoro	Ụdị ngwaahịa nkịtị	Ọgwụgwọ okpomọkụ
8.8	35# / 45# Carbon Steel 40Cr Alloy Steel	Hex Bolt, Hex Cap Screw, Carriage Bolt, Stud Bolt	Na-emenyụ & iwe