ASTM A500 1 yog txias-tsim welded thiab seamless carbon steel structural tubing rau welded, riveted, los yog bolted txuas hniav thiab lub tsev cov qauv thiab cov hom phiaj dav dav.
Qib Byog ib tug ntau yam txias-tsim welded los yog seamless carbon steel structural raj nrog ib tug yield zog ntawm tsis tsawg tshaj li 315 MPa [46,000 psi] thiab lub tensile lub zog ntawm tsis tsawg tshaj li 400 MPa [58,000], uas yog siv nyob rau hauv ntau yam ntawm architectural. thiab mechanical structural tej yaam num vim nws zoo heev structural stability thiab durability.
ASTM A500 faib cov yeeb nkab steel rau hauv peb qib,qib B,qib C, thiab qib D.
Rau cov raj nrogsab nraud txoj kab uas hla ≤ 2235mm [88in]thiabphab ntsa thickness ≤ 25.4mm [1in].
Txawm li cas los xij, yog tias siv cov txheej txheem ERW vuam, tsuas yog cov kav dej uas muaj qhov siab tshaj plaws ntawm 660 hli thiab phab ntsa tuab ntawm 20 hli tuaj yeem ua tau.
Yog tias koj xav yuav cov yeeb nkab nrog lub taub loj dua phab ntsa tuab, koj tuaj yeem xaiv siv cov txheej txheem SAW vuam.
CHS: Circular hollow sections.
RHS: Square lossis rectangular hollow seem.
EHS: Elliptical hollow seem.
Cov hlau yuav tsum tau ua los ntawm ib lossis ntau qhov txheej txheem hauv qab no:yooj yim oxygen los yog hluav taws xob rauv.
Basic Oxygen txheej txheem: Qhov no yog ib tug niaj hnub ceev ceev txoj kev ntawm steel ntau lawm, uas txo cov pa roj carbon ntsiab lus los ntawm tshuab pa oxygen mus rau lub molten npua hlau thaum tshem tawm lwm yam tsis xav tau xws li sulfur thiab phosphorus.Nws yog qhov tsim nyog rau kev tsim khoom sai ntawm cov hlau ntau ntau.
Cov Txheej Txheem Hluav Taws Xob Hluav Taws Xob: Cov Txheej Txheem Hluav Taws Xob Hluav Taws Xob siv lub tshuab hluav taws xob kub kub kom yaj cov seem thiab ncaj qha txo cov hlau, thiab tshwj xeeb tshaj yog tsim nyog rau kev tsim cov qib tshwj xeeb thiab tswj cov khoom sib xyaw ua ke, nrog rau cov khoom me me.
Tubes yuav tsum tau ua los ntawm covHluav taws xob tsis kam-welded (ERW)txheej txheem.
ERW yeeb nkab yog txheej txheem ntawm kev tsim cov vuam los ntawm coiling cov khoom siv hlau rau hauv lub tog raj kheej thiab siv cov kev tiv thaiv thiab siab raws nws qhov ntev.
Qib B tubing tuaj yeem muab tshem tawm lossis txo kev ntxhov siab.
Cov tshuaj muaj pes tsawg leeg ntawm ASTM A500 Qib B steel suav nrog cov pa roj carbon ntau thiab manganese los xyuas kom meej cov khoom zoo thiab kev sib txuas.Nyob rau tib lub sijhawm, phosphorus thiab sulfur qib yog nruj tswj hwm kom tsis txhob muaj embrittlement, thiab nruab nrab ntxiv ntawm tooj liab txhim kho corrosion kuj.
Cov khoom no zoo tagnrho rau kev siv cov qauv, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas yuav tsum tau weldability thiab durability.
Cov qauv yuav tsum tau ua raws li cov kev cai ntawm ASTM A370, Appendix A2.
| Sau npe | Qib B | |
| Tensile zog, min | psi | 58,000 ib |
| MPa | 400 | |
| Yield zog, min | psi | 46,000 ib |
| MPa | 315 | |
| Elongation hauv 2 nti (50 mm), min,C | % | 23A |
| ASiv rau cov phab ntsa thicknesses (t) sib npaug los yog ntau dua 0.180 nyob rau hauv. [4.57mm].Rau qhov sib zog teev cov phab ntsa thicknesses, qhov tsawg kawg nkaus elongation qhov tseem ceeb yuav tsum tau xam los ntawm cov mis: feem pua elongation nyob rau hauv 2 in. [50 mm] = 61t + 12, sib npaug mus rau qhov ze feem pua.Rau A500M siv cov qauv hauv qab no: 2.4t + 12, sib npaug rau qhov ze tshaj plaws. CQhov tsawg kawg nkaus elongation qhov tseem ceeb uas tau teev tseg tsuas yog siv rau cov kev sim ua ntej xa khoom ntawm cov tubing. | ||
Welddkev siv hluav taws xobtyog: Siv cov khoom siv tsawg kawg yog 4 ntiv tes (100 mm) ntev, flatten cov qauv nrog lub vuam ntawm 90 ° mus rau qhov kev taw qhia ntawm kev thauj khoom kom txog rau thaum qhov kev ncua deb ntawm daim hlau yog tsawg dua 2/3 ntawm sab nraud ntawm cov yeeb nkab.cov qauv yuav tsum tsis txhob tawg lossis tawg ntawm qhov chaw sab hauv lossis sab nraud thaum lub sijhawm ua haujlwm no.
Pipe ductility test: txuas ntxiv flatten tus qauv kom txog rau thaum qhov kev ncua deb ntawm daim hlau yog tsawg dua 1/2 ntawm cov yeeb nkab sab nraud.nyob rau lub sijhawm no, cov yeeb nkab yuav tsum tsis txhob muaj cov kab nrib pleb lossis tawg ntawm sab hauv thiab sab nrauv.
Kev ncaj nceestyog: Txuas ntxiv kom tiaj tus qauv kom txog thaum muaj kev puas tsuaj los yog kom txog thaum tus txheeb ze phab ntsa thickness yuav tsum tau ua.Yog tias cov ntaub ntawv pov thawj ntawm ply tev, cov khoom tsis ruaj khov, lossis tsis tiav welds tau pom thaum lub sij hawm qhov kev sim flattening, cov qauv yuav raug txiav txim tsis txaus siab.
Kev ntsuas flaring yog muaj rau cov raj puag ncig ≤ 254 mm (10 in) inch, tab sis tsis tas yuav tsum tau ua.
Tag nrho cov tubing yuav tsum tsis muaj qhov tsis xws luag thiab yuav tsum muaj cov neeg ua haujlwm tiav.
Deg imperfections yuav tsum tau muab cais raws li qhov tsis xws luag thaum lawv qhov tob txo qhov seem ntawm phab ntsa kom tsawg dua 90% ntawm cov phab ntsa thickness.
Cov teeb meem txog li 33% ntawm cov phab ntsa tuab hauv qhov tob yuav raug tshem tawm tag nrho los ntawm kev txiav lossis sib tsoo kom tiav cov hlau.
Yog tias siv cov khoom siv welding, cov txheej txheem ntub dej yuav tsum tau siv thiab cov hlau txuas ntxiv yuav tsum raug tshem tawm kom tswj tau qhov chaw du.
Deg tsis xws luag, xws li tuav cov cim, me me pwm los yog yob cov cim, los yog cov pits ntiav, tsis suav hais tias yog tsis xws luag, lawv yuav raug tshem tawm nyob rau hauv lub thickness ntawm phab ntsa.
Cov ntaub ntawv hauv qab no yuav tsum suav nrog:
Tus neeg tsim khoom lub npe: Qhov no tuaj yeem yog cov chaw tsim khoom lub npe lossis cov ntawv luv.
Hom lossis Trademark: Lub npe hom lossis cov cim lag luam siv los ntawm cov chaw tsim khoom kom paub qhov txawv ntawm nws cov khoom.
Specification Designator: ASTM A500, uas yuav tsum tsis suav nrog xyoo ntawm kev tshaj tawm.
Ntawv Qib: B, C lossis D qib.
Rau cov qauv raj ≤ 100mm (4in) hauv txoj kab uas hla, cov ntawv cim tuaj yeem siv los kos cov ntaub ntawv qhia kom meej.
Feem ntau siv rau kev tsim qauv, nws muab qhov tsim nyog txhua yam lub zog thiab weldability los txhawb kev tsim thiab kev tsim kho vaj tse thiab kev tsim vaj tsev.
Cov yeeb nkab steel no tau siv dav hauv kev tsim cov thav duab, txuas hniav, chaw tsim khoom, thiab ntau yam ntawm cov khoom siv uas yuav tsum tau muaj zog thiab kav ntev.
ASTM A370: Test Methods and Definition for Mechanical Testing of Steel Products.
ASTM A700: Phau ntawv qhia rau kev ntim khoom, kos npe, thiab thauj cov txheej txheem rau cov khoom siv hlau rau kev xa khoom.
ASTM A751: Test Methods and Practices for Chemical Analysis of Steel Products.
ASTM A941 Terminology Hais txog Hlau, Stainless Hlau, Yam Alloys, thiab Ferroalloys.
Raws li cov neeg siv khoom xav tau, kev tiv thaiv corrosion ntawm steel yeeb nkab nto tuaj yeem ua tau ntau txoj hauv kev los txhim kho nws cov kev tiv thaiv corrosion thiab ua kom nws lub neej ntev.
Xws li cov kua roj vanish, xim, galvanization, 3PE, FBE, thiab lwm yam.
Peb yog ib tug zoo welded carbon steel yeeb nkab chaw tsim tshuaj paus thiab tsum los ntawm Tuam Tshoj, thiab kuj yog ib tug seamless steel yeeb nkab stockist, muab koj ib tug ntau yam ntawm cov yeeb nkab steel kev daws teeb meem!
Yog tias koj xav paub ntau ntxiv txog cov khoom siv steel yeeb nkab, koj tuaj yeem tiv tauj peb!
