ASTM A519 yog tus qauv kev qhia tshwj xeeb rau seamless carbon thiab alloy steel mechanical tubing. Tsis zoo li cov qauv ntawm cov yeeb nkab siab xws li ASTM A106 lossis ASTM A335, A519 tubing yog tsim los rau kev siv tshuab thiab cov qauv siv qhov chaw qhov tseeb, qhov chaw tiav, thiab cov khoom siv tshwj xeeb muaj teeb meem ntau dua li qhov ntsuas siab sab hauv. Phau ntawv qhia no piav qhia txog qib qib, chemistry, kev tsim khoom, kev ua siab ntev, kev sim, thiab kev txiav txim cov ntaub ntawv uas cov neeg yuav khoom xav tau thaum nrhiav A519 tubing.
Qib Classification
A519 suav nrog ntau yam ntawm cov qhab nia tsim los ntawm cov tshuaj muaj pes tsawg leeg. Cov qib carbon yog siv rau kev ua haujlwm dav dav thiab lub tog raj kheej, qib alloy rau siab -lub zog thiab qaug zog- qhov tseem ceeb, thiab qib hluav taws xob rau cov kabmob thiab lub zog.
| Qib Hom | Steel Designations | Tej kev siv |
|---|---|---|
| Cov pa roj carbon steel | 1020, 1025, 1030, 1040, 1045, 1050, 1060 | General machining, cylinders, rollers, shafts |
| Cov hlau alloy | 4130, 4140, 4150, 4340, 8620, 8625, 9310 | Siab -qhov chaw muaj zog, aerospace thiab automotive Cheebtsam |
| Hluav taws xob rauv qib | E3310, E4340, E52100 | Siab-cov kabmob, lub zog, qhov chaw carburized |
Tshuaj muaj pes tsawg leeg ntawm cov qib tseem ceeb
Chemistry txiav txim siab hardenability, weldability, thiab zaum kawg mechanical teb. Cov kev txwv rau cov qib uas nquag xaj feem ntau yog qhia hauv qab no.
| Qib | C, % | Mn,% | P max,% | S max,% | Si,% | Cr,% | Mo,% | Tsis yog,% |
|---|---|---|---|---|---|---|---|---|
| 1020 | 0.18-0.23 | 0.30-0.60 | 0.040 | 0.050 | 0.10-0.35 | - | - | - |
| 1045 | 0.43-0.50 | 0.60-0.90 | 0.040 | 0.050 | 0.10-0.35 | - | - | - |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.035 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | - |
| 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | - |
| 4340 | 0.38-0.43 | 0.60-0.80 | 0.035 | 0.040 | 0.15-0.35 | 0.70-0.90 | 0.20-0.30 | 1.65-2.00 |
| 8620 | 0.18-0.23 | 0.70-0.90 | 0.035 | 0.040 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 |
Kev tsim khoom
A519 tubing yuav tsum tau tsim los ntawm txoj kev seamless; welded tubing tsis tso cai. Lub billet yog kub pierced thiab dov, ces ua tiav los ntawm kub xov, txias kos duab, los yog txias dov nyob ntawm seb yuav tsum tau kam rau ua thiab nto. Kev kho cua sov yog siv raws li qhov xav tau los ntawm kev yuav khoom, feem ntau annealed, normalized, los yog quenched thiab tempered. Vim tias tsis muaj qhov ntev weld seam, cov khoom sib xws nyob ib ncig ntawm lub voj voog, uas yog ib qho tseem ceeb rau cov khoom uas yog machined mus rau nyias phab ntsa.
Tej yam cuab yeej cuab tam
Cov khoom sib txawv nrog kev kho cua sov, yog li cov txiaj ntsig hauv qab no yog cov kev taw qhia ib txwm es tsis lees paub qhov tsawg kawg nkaus. Paub meej tias qhov yuav tsum tau ua tiag tiag tiv thaiv cov xwm txheej tau teev tseg ntawm koj daim ntawv xaj.
| Qib | Qhov xwm txheej | Tensile zog, MPa | Yield zog, MPa | Elongation,% | Hardness, HB |
|---|---|---|---|---|---|
| 1020 | Txias kos | 380-550 | 310 min | 10-20 | 121-170 |
| 1045 | Li qub | 625-750 | 370 nqi | 12-18 | 170-210 |
| 4130 | Normalized thiab tempered | 670-900 | 435 nqi | 15-22 | 190-250 |
| 4140 | Roj quenched thiab tempered | 850-1050 | 700 min | 12-18 | 260-320 |
| 4340 | Roj quenched thiab tempered | 1000-1200 | 900 min | 10-15 | 300-380 |
| 8620 | Case- hardening zoo | 500-700 | 350 min | 18-25 | 150-200 |
Dimensional Tolerances
Txias-cov tubing kos tau teev nyob qhov twg cov khoom lag luam yuav tsum raug txo kom tsawg. Tej yam mob khaub thuas-kos sab nraud txoj kab uas hla tolerance yog ntxiv los yog rho tawm 0.10 mus rau 0.38 hli nyob ntawm qhov loj me, nrog rau phab ntsa thickness kam rau siab txog ntxiv los yog rho tawm 10 feem pua ntawm nominal, thiab ncaj ntawm 0.5 hli ib meter siab tshaj plaws. Kub- cov tubing tiav yog muab nrog rau sab nraud txoj kab uas hla ntawm qhov sib ntxiv los yog rho tawm 0.75 feem pua ntawm cov kab sab nraud, thiab cov nplai zeb yuav muaj nyob rau ntawm qhov chaw. Concentricity yog sib xws nyob rau hauv txias - kos cov khoom, uas tseem ceeb rau lub tog raj kheej honing thiab precision tig.
Kev xeem thiab ntawv pov thawj
Kev tshuaj xyuas tshuaj yog ua rau txhua qhov cua sov ntawm ASTM A751; tensile thiab flattening xeem ua raws li ASTM A370; Kev ntsuas hardness ua raws li ASTM E10 lossis E18. Tsis yog -kev kuaj xyuas los ntawm ultrasonic, eddy tam sim no, los yog magnetic particle txoj kev muaj nyob rau thaum teev nyob rau hauv daim ntawv xaj. Daim ntawv pov thawj cov ntaub ntawv pov thawj qhia txog cov cua sov, chemistry, thiab cov khoom siv kho tshuab tau muab nrog rau txhua pawg, muab tag nrho traceability rau cov tshuab zoo.
Kev lag luam kev siv
Automotive manufacturers siv A519 tubing rau hydraulic cylinders, shock absorber lub cev, tsav shafts, thiab steering kab nyob rau hauv 1020, 1035, 4130, thiab 4140. Aerospace cov kev pab cuam tshuab 4130 thiab 4340 rau hauv actuator cylinders, cav mounts, thiab structur Machinery builders siv 1045, 4140, 4340, thiab 8620 rau rollers, spindles, thiab bushings. Kev pabcuam roj thiab roj siv 4140, 4340, thiab 8630 rau lub cev valve, twj tso kua mis, mandrels, thiab cov cuab yeej downhole. Hydraulic thiab pneumatic systems feem ntau siv honed 1020, 1045, thiab 4130 rau lub tog raj kheej chim thiab accumulator hlab.
Kev sib piv nrog lwm yam Seamless Specifications
| Specification | Kev siv thawj zaug | Qhov tseem ceeb sib txawv ntawm A519 |
|---|---|---|
| ASTM A519 Cov Lus Qhia Tshwj Xeeb | Mechanical thiab structural tubing | Tight tolerances, ntau yam mob, tsis muaj kev ntsuas siab |
| ASTM A106 1 | Kev pabcuam siab ntawm qhov kub thiab txias | Kev ntsuas siab nrog cov kev txwv sib txawv |
| ASTM A335 Cov Lus Qhia Tshwj Xeeb | Siab -kub siab piping | Alloy qib tau teev tseg rau creep kuj |
| ASTM A 213 | Boiler thiab tshav kub exchanger raj | Siab- nruj, siab - qhov kub thiab txias |
| ASTM A500 1 | Cov qauv tubing, welded thiab seamless | Cov qauv ntu, tsis tshua muaj kev ua siab ntev |
Ntiaj teb no sib npaug
Cov sib npaug thoob ntiaj teb sib npaug rau A519 qib suav nrog EN 10083 thiab EN 10084 tus qauv: 1020 piv nrog 1.0402 C22, 1045 nrog 1.0503 C45, 4130 nrog 1.7218 25CrMo4, 413}40 nrog {1.7218 25CrMo4, 41340} 1.6582 34CrNiMo6, thiab 8620 nrog 1.6523 20NiCrMo2. JIS sib npaug suav nrog S20C, S45C, SCM430, SCM440, SNCM439, thiab SCM420 raws li.
Ordering Information
Qhia cov hauv qab no thaum thov cov lus hais: specification ASTM A519, qib, tus lej code, sab nraud txoj kab uas hla los ntawm phab ntsa thickness, ntev, kawg tiav, nto tiav, thiab kev kuaj tshwj xeeb lossis ntawv pov thawj. Ib qho piv txwv tiav yog: ASTM A519 4140 QT, 76.2 mm sab nraud txoj kab uas hla los ntawm 6.35 mm phab ntsa, txiav mus rau 3 m ntev, xaus chamfered, 28-32 HRC.
FAQ
Puas yog ASTM A519 tubing ntsuas rau siab?
No. A519 yog tus qauv siv tshuab raj thiab tsis muaj qhov ntsuas siab. Cheebtsam uas muaj lub siab yuav tsum tau tsim thiab txheeb xyuas cais, feem ntau tawm tsam tus qauv ntawm cov yeeb nkab siab.
Qhov txawv ntawm qhov txias-kos thiab kub-Tiav A519 tubing yog dab tsi?
Txias-cov tubing rub tau nruj dua sab nraud txoj kab uas hla thiab phab ntsa kam rau ua, lub ntsej muag du, thiab zoo dua concentricity. Kub- cov tubing tiav yog kev lag luam ntau dua rau qhov loj dua thiab cov phab ntsa tuab dua qhov kev siv tshuab ua haujlwm tau txais.
A519 qib twg yog qhov zoo tshaj rau cov iav carburized?
8620 thiab 9310 yog qhov kev xaiv tus qauv. 8620 muaj qhov sib npaug zoo ntawm cov ntaub ntawv hardness thiab core toughness, thaum 9310 muab cov tub ntxhais muaj zog dua thiab muaj ntau hauv aerospace gearing.
Puas yog A519 tubing yuav tsum tau kuaj hydrostatic?
Tsis yog los ntawm lub neej ntawd. Vim tias cov tubing tsis raug ntsuas rau kev pabcuam siab, kev kuaj hydrostatic tsis yog qhov yuav tsum tau ua. Tsis yog- kev kuaj xyuas kev puas tsuaj xws li kev ntsuas ultrasonic lossis eddy tam sim no tuaj yeem raug ntxiv thaum tau teev tseg.
A519 alloy tubing puas tuaj yeem muab rau hauv quenched thiab tempered mob?
Yog lawm. Qib xws li 4140 thiab 4340 tau muab tsis tu ncua nyob rau hauv QT mob, nrog hardness ranges xws li 28-32 HRC los yog 30-36 HRC tau lees paub ntawm qhov kev txiav txim kom phim cov machining thiab cov kev pabcuam.
