Stainless Steel Bolts: Hex Bolts uye Material Magiredhi

2026-08-05

1. Nhanganyaya

Stainless simbi mabhaudhi anosanganisa corrosion kuramba nesimba remuchina, zvichiita kuti zvive zvakakosha pakuvaka, mugungwa, kugadzira chikafu, uye maindasitiri ekurapa. Kusiyana nekabhoni simbi yekusungirira inoda machira ekudzivirira, simbi isina tsvina inowana kusagadzika kwayo kwekuora kubva kune inozviporesa chromium oxide layer. Iri gwara rinofukidza maviri akanyanya kukosha maficha: hex bhaudhi dhizaini uye simbi isina giredhi sarudzo.

2. Hex Bolts

Hex mabhoti ane mativi matanhatu-mativi musoro unogonesa kufambisa torque kuburikidza neyakajairwa wrenches kana sockets. Iyo dhizaini inosanganisira musoro une hexagonal, shank isina kuverengerwa, chikamu chine shinda, uye chamfered tip. Mabhenefiti akakosha anosanganisira yakakwira torque huwandu, kuwanikwa kwepasirese, kugona kugadzira, kushandiswazve, uye kutevedzera zviyero zvepasi rose (ISO 4014, DIN 933, ASTM A325).

Tafura 1. Yakajairwa Hex Bolt Size (Stainless Simbi)

Nominal Saizi	Thread Pitch (TPI)	Musoro Wehupamhi (mm)	Tensile Simba (MPa)
1/4 - 20	20	11.1	520
3/8 - 16	16	14.3	520
1/2 - 13	13	19.1	520
3/4 - 10	10	28.6	520

3. Stainless Steel Grades

Stainless simbi fasteners akaiswa mhuri ina: austenitic (304, 316 — non-magnetic, high corrosion resistance), ferritic (430 — magnetic, economical), martensitic (410 — hardenable, moderate corrosion), uye precipitation-hardening (17-4PH — high simba). Pasi peISO 3506, mamakisi anoshandisa tsamba-nhamba kodhi apo A = austenitic, C = martensitic, uye nhamba inoreva tensile simba kirasi (50/70/80).

Tafura 2. Common Stainless Steel Grades yeBolts

Giredhi	ISO Kirasi	Tensile (MPa)	Corrosion Resist.	Key Elements	Typical Application
304	A2-70	700	Zvakanaka	18% Cr, 8% Ni	General chinangwa, zvokudya
316	A4-70	700	Excellent	16% Cr, 10% Ni, 2% Mo	Marine, makemikari, mishonga
410	C3-80	550	Pakati nepakati	12% Cr	Cutlery, mavharuvhu
17-4PH	A4-80	800	Zvakanaka	16% Cr, 4% Ni, 4% Cu	Aerospace, yakakwirira-simba

3.1 Kusarudzwa kweGiredhi neNzvimbo

Tafura 3. Recommended Grades by Service Environment

Environment	Recommended Grade	Chikonzero
Indoor / Dry	304 (A2)	Zvakakwana pamutengo wakaderera
Kunze / Coastal	316 (A4)	Mo anoramba kurwiswa kwechloride
Chemical Plant	316L / 904L	Superior acid resistance
Kunodiwa Kwesimba Rakakwirira	17-4PH (A4-80)	Kunaya-kwakaoma

Stainless Steel Bolts Hex Bolts uye Material Magiredhi

4. Pfungwa Huru

Galling: Austenitic mamakisi (304, 316) anowanzoita shinda kubata panguva yekuomesa. Shandisa anti-seiize makomisheni kana akasiyana giredhi pairings (A2 bhaudhi ine A4 nut) kuderedza.

Passivation: Acid kurapwa (ASTM A967) inobvisa simbi yemahara uye inokwidziridza iyo oxide layer, inovandudza corrosion resistance mushure mekugadzira.

Magnetism: Austenitic mamakisi haasi magineti kana akavharirwa asi anogona kuita zvishoma magineti mushure mekutonhora kushanda. Ferritic uye martensitic mamakisi ari ega magineti.

5. Mhedziso

Stainless simbi hex mabhoti anosanganisa anoshanda geometric dhizaini nemetallurgical versatility. Kubva mune zvehupfumi Giredhi 304 rekushandisa zvakajairika kusvika kune yakakwira-simba 17-4PH yekuda maapplication, kuenzanisa giredhi chairo kune nharaunda yesevhisi inovimbisa kuita kwakakwana uye hupenyu hurefu.

Hauna. Next.