Stainless hlau bolts: Hex Bolts thiab cov khoom qib

2026-08-05 IB

1. Taw qhia

Stainless hlau bolts sib xyaw ua ke muaj kev tiv thaiv corrosion nrog txhua yam muaj zog, ua rau lawv tseem ceeb hauv kev tsim kho, dej hiav txwv, kev ua zaub mov, thiab kev kho mob kev lag luam. Tsis zoo li carbon steel fasteners xav tau cov txheej txheem tiv thaiv, stainless hlau muab nws cov kev tiv thaiv corrosion los ntawm tus kheej-kho chromium oxide txheej. Cov lus qhia no suav nrog ob qhov tseem ceeb tshaj plaws: hex bolt tsim thiab xaiv qib stainless hlau.

2. Hex Bolts

Hex bolts feature ib lub taub hau rau lub taub hau ua kom muaj zog hloov pauv ntawm tus qauv wrenches lossis qhov (sockets). Cov qauv tsim muaj lub taub hau hexagonal, unthreaded shank, threaded feem, thiab chamfered taub. Cov txiaj ntsig tseem ceeb suav nrog lub peev xwm siab torque, kev nkag mus tau thoob ntiaj teb, kev tsim khoom lag luam, rov siv tau dua, thiab ua raws li cov qauv thoob ntiaj teb (ISO 4014, DIN 933, ASTM A325).

Table 1. Standard Hex Bolt Sizes (Stainless Steel)

Nominal Loj	Xov Pitch (TPI)	Lub taub hau dav (mm)	Tensile zog (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 Hlau Qib

Stainless hlau fasteners raug faib ua plaub tsev neeg: austenitic (304, 316 - non-magnetic, siab corrosion resistance), ferritic (430 - sib nqus, yig), martensitic (410 - hardenable, nruab nrab corrosion), thiab nag lossis daus-hardening (17-4PH - siab zog). Raws li ISO 3506, qib siv ib tsab ntawv-tus lej code qhov twg A = austenitic, C = martensitic, thiab tus lej qhia txog lub zog tensile (50/70/80).

Table 2. Hom Stainless Hlau Qib rau Bolts

Qib	ISO Class	Tensile (MPa)	Corrosion tiv taus.	Cov ntsiab lus tseem ceeb	Daim ntawv thov
304	A2-70	700	Zoo	18% Cr, 8% Ni	Lub hom phiaj dav dav, zaub mov
316	A4-70	700	Zoo heev	16% Cr, 10% Ni, 2% Mo	Marine, tshuaj, kho mob
410	C3-80	550	Nruab nrab	12% Cr	Cutlery, li qub
17-4 PAB	A4-80	800	Zoo	16% Cr, 4% Ni, 4% Cu	Aerospace, siab zog

3.1 Qib Xaiv los ntawm Ib puag ncig

Table 3. Pom zoo Qib los ntawm Kev Pabcuam Ib puag ncig

Ib puag ncig	Pom zoo Qib	Yog vim li cas
Sab hauv / Qhuav	304 (A2)	Tsim nyog ntawm tus nqi qis
Sab nraum zoov / ntug hiav txwv	316 (A4)	Mo resists chloride nres
Tshuaj cog	316L / 904 hli	Superior acid kuj
Kev xav tau siab	17-4PH (A4-80)	Dej nag-hardened

Stainless hlau bolts Hex Bolts thiab cov khoom qib

4. Cov ntsiab lus tseem ceeb

Galling: Austenitic qib (304, 316) yog qhov yooj yim rau cov xov seizing thaum nruj. Siv cov khoom sib txuas los tiv thaiv kev sib txuas lossis cov qib sib txawv (A2 bolt nrog A4 txiv ntoo) kom txo tau.

Passivation: Kev kho cov kua qaub (ASTM A967) tshem tawm cov hlau dawb thiab txhim kho cov txheej txheem oxide, txhim kho corrosion kuj tom qab tsim khoom.

Magnetism: Austenitic qib tsis yog sib nqus thaum annealed tab sis yuav dhau los ua ib nrab sib nqus tom qab ua haujlwm txias. Ferritic thiab martensitic qib yog qhov sib nqus.

5. Cov lus xaus

Stainless hlau hex bolts sib koom ua ke cov tswv yim geometric tsim nrog metallurgical versatility. Los ntawm kev lag luam qib 304 rau kev siv dav dav mus rau lub zog siab 17-4PH rau kev thov rau kev thov, sib piv cov qhab nia raug rau qhov chaw pabcuam ua kom pom kev ua haujlwm zoo thiab ua haujlwm ntev.

Tsis Muaj. Tom ntej no.

Xov xwm tshiab