Dab tsi ASTM A500 npog
ASTM A500/A500M yog tus qauv specification rau txias - ua welded thiab seamless carbon steel structural tubing nyob rau hauv round, square thiab rectangular duab. Cov tubing yog tsim los ntawm txias sib sau sawb los yog phaj rau hauv ib tug hollow seem nrog ib tug nruam weld, los yog raws li ib tug seamless khoom, thiab nws yog siv raws li ib tug structural tswv cuab es tsis yog raws li lub siab los yog mechanical raj. Qhov kev qhia tshwj xeeb txhais tau qib A, B, C thiab D thiab muab cov khoom sib cais rau cov ntu puag ncig thiab ua kom zoo li tus, uas yog square thiab duab plaub, ntu.
Vim hais tias cov tubing yog txias tsim, tus txheej txheem kho cov xaim phab ntsa tuab raws li tus nqi nominal nrog kev tso cai rho tawm, thiab kev tsim qauv kev coj ua tau them nyiaj los ntawm kev siv cov phab ntsa txo qis hauv cov khoom vaj huam sib luag.
Hla -Txoj kev sib piv
| Txuj | Khoom | Piv txwv qib | Min tawm los | Tensile | Kev cuam tshuam |
|---|---|---|---|---|---|
| ASTM A500 / A500M | Txias-ua welded thiab seamless structural tubing | Qib C, zoo li seem | 345 MPa rau | 427 MPa min | Tsis xav tau |
| TS EN 10219-1 | Txias tsim welded structural hollow seem | S355J2H | 355 MPa rau | 470-630 MPa | 27 J ntawm -20 ° C |
| TS EN 10210-1 | Kub tiav structural hollow seem | S355J2H | 355 MPa rau | 470-630 MPa | 27 J ntawm -20 ° C |
| JIS G3444 | Cov pa roj carbon steel raj rau kev tsim qauv | STK400 | 235 MPa rau | 400 MPa min | Tsis xav tau |
| CSA G40.21 | Cov qauv zoo steel | 350W | 350 MPa | 450-650 MPa | Nyob rau hauv chav kawm ntawv suffix |
| GB/T 6728 | Txias- ua ntu ntu rau cov qauv dav dav | Q355 ntawm GB / T 1591 | 355 MPa rau | 470-630 MPa | Raws li qib zoo |
Ob lub ntsiab lus piav qhia feem ntau ntawm qhov sib txawv ntawm lub rooj. Ua ntej, EN, JIS thiab GB tshuab luam tawm cov txiaj ntsig thiab tensile qhov tseem ceeb uas hloov nrog phab ntsa tuab, thaum ASTM A500 hais txog tus nqi qis kawg nkaus rau qib thiab ntu hom. Thib ob, EN 10219 thiab EN 10210 qib hauv H zoo nqa tau txais txiaj ntsig Charpy, yog li tus tsim qauv ua haujlwm rau European system tau txais qhov tsis sib haum xeeb ua ib feem ntawm kev xaiv qib es tsis yog qhov yuav tsum tau ua ntxiv.
Phab ntsa Tolerance thiab tsim qhov tshwm sim
Phab ntsa thickness kam rau ua nyob rau hauv ASTM A500 yog ib tug minus kam rau ua ntawm 10% ntawm nominal. Cov qauv tsim cov cai yog li ntawd yuav tsum tau tsim cov thickness txo: kev suav rau cov square thiab cov seem feem ntau yog raws li 0.93 npaug ntawm cov phab ntsa nominal thickness, thiab cov ces kaum sib npaug ntawm cov seem, uas yog cov khoom ntawm kev sib sau txias, cuam tshuam rau cov khoom seem suav nrog. Tus tsim qauv hloov ib txoj haujlwm los ntawm qib EN mus rau A500, lossis qhov thim rov qab, yuav tsum rov qab xyuas cov seem muaj peev xwm ntau dua li tsis xav tias qhov zoo sib xws nominal qhov ntev muab cov txiaj ntsig zoo ib yam.
Puas Muaj Lwm Cov Tube Standards Hloov rau A500?
Cov yeeb nkab ua rau ASTM A53 yog tsim los rau kev siv tshuab thiab kev ua haujlwm siab thiab nqa cov khoom muaj zog qis dua li cov qauv tubing; nws tsis pom zoo los ua ib qho kev hloov ncaj qha hauv kev siv cov qauv.
Tubing ua rau ASTM A513 yog cov khoom siv tubing tshwj xeeb hauv qhov ntev ntawm kev tswj hwm tab sis lub zog tsis tau lees paub tshwj tsis yog nws tau hais cais, yog li nws tsis hloov A500 hauv cov tswv cuab tsim qauv.
ASTM A1085 yog ib qho kev qhia tshwj xeeb ntawm cov raj xa dej tshiab uas teeb tsa ib qho 50 ksi yield qib nrog lub zog tensile tsawg dua thiab qhov yuav tsum tau muaj qhov yuav tsum tau ua kom nruj, ua ke nrog cov phab ntsa nruj dua li A500.
TS EN 10219-1 S355J2H, JIS G3444 STK490 thiab GB / T 6728 Q355 hollow seem tuaj yeem ua haujlwm rau tib lub hom phiaj, tab sis txhua tus nqa nws tus kheej thickness raws li qhov tseem ceeb ntawm lub zog thiab cov cai kam rau ua.
Testing thiab Ordering Points
ASTM A500 yuav tsum muaj kev ntsuam xyuas nruj thiab kev ntsuam xyuas flattening ntawm cov qauv ntawm cov tubing tiav, thiab kev txwv tshuaj siv rau carbon, manganese, phosphorus, sulfur thiab tooj liab.
Kev ntsuam xyuas qhov cuam tshuam tsis yog ib feem ntawm lub hauv paus A500 qhov yuav tsum tau ua, yog li qhov project xav tau qhov tsis zoo ntawm qhov yuav tsum tau xaj nws raws li qhov yuav tsum tau ua ntxiv.
Qhia cov qib, seem duab thiab qhov loj me, lub phab ntsa nominal thickness thiab qhov ntev, thiab paub meej tias yuav tsum tau welded los yog seamless tubing.
Qhov twg ib qhov project sib xyaw cov qauv, sau qhov sib npaug ntawm qib kev sib raug zoo thiab lub hauv paus ntawm kev hloov pauv hauv cov ntaub ntawv tsim.
Tshawb xyuas daim ntawv pov thawj zeb rau qhov tseeb phab ntsa tuab thiab cov txiaj ntsig kev xeem, txij li qhov tsim muaj peev xwm ntawm cov txheej txheem raj nyob ntawm phab ntsa xa.
FAQ
Q: ASTM A53 yeeb nkab puas tuaj yeem siv los hloov A500 tubing hauv cov qauv?
Nws tsis pom zoo. A53 yog tsim los rau kev siv tshuab thiab kev pabcuam siab thiab muaj lub zog qis zog, yog li nws tsis tshua muaj txiaj ntsig thiab tsis sib haum rau cov qauv tsim ntawm cov tswv cuab ntawm cov qauv.
Q: Cov European sib npaug ntawm ASTM A500 yog dab tsi?
Txias tsim welded structural hollow seem rau EN 10219-1, feem ntau nyob rau hauv qib S355J2H, yog cov European li ib txwm counterpart, nrog guaranteed notch toughness qhov tseem ceeb.
Q: Vim li cas cov neeg tsim qauv txo cov phab ntsa thickness ntawm A500 tubing?
Vim hais tias qhov kev qhia tshwj xeeb tso cai rau qhov kev zam ntawm 10% ntawm nominal phab ntsa, cov qauv tsim cov lej yuav tsum tau suav raws li tus qauv tsim txo qis, feem ntau yog 0.93 npaug ntawm tus nqi nominal.
Q: Puas yog A500 xav tau kev kuaj xyuas?
Tsis yog. Tsis muaj qhov toughness tsis yog ib feem ntawm lub hauv paus specification thiab yuav tsum tau txiav txim raws li ib tug ntxiv yuav tsum tau thaum tus tsim los yog tus neeg thov nws.
Q: Puas yog ASTM A500 tseem tam sim no?
Yog lawm. A500/A500M tseem yog tus qauv thoob ntiaj teb, thiab nws cov qhab nia raug lees paub thiab tau txais los ntawm cov qauv txheej txheem sab nraud Tebchaws Meskas.
Q: Cov kev xeem twg A500 xav tau ntawm lub raj tiav?
Kev ntsuam xyuas nruj thiab kev ntsuas flattening yuav tsum tau ua, nrog rau kev ua raws li cov tshuaj muaj pes tsawg leeg txwv tau teev tseg hauv cov lus qhia tshwj xeeb.
