ASTM A500 yog txias-tsim welded thiab seamless carbon steel structural tubing rau welded, riveted, los yog bolted choj thiab lub tsev cov qauv thiab cov hom phiaj dav dav.
Qib C yeeb nkab yog ib qho ntawm cov qib siab yield zog tsis tsawg dua 345 MPa thiab lub zog tensile tsis tsawg dua 425 MPa.
Yog xav paub ntxiv txogASTM A500 1, koj tuaj yeem nyem rau nws!
ASTM A500 faib cov yeeb nkab steel rau hauv peb qib,qib B, qib C, thiab qib D.
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.
Tubing yuav tsum tau ua los ntawm aseamlesslos yog vuam txheej txheem.
Welded tubing yuav tsum tau ua los ntawm cov hlau tiaj tus los ntawm cov txheej txheem hluav taws xob-tiv taus-welding (ERW).Lub longitudinal pob qij txha ntawm welded tubing yuav tsum tau welded hla nws thickness nyob rau hauv xws li ib tug zoo xws li cov qauv tsim lub zog ntawm cov tubing seem yog assured.
ASTM A500 Qib C tuaj yeem muab tshem tawm lossis txo kev ntxhov siab.
Annealing yog ua tiav los ntawm cua sov lub raj mus rau qhov kub thiab txias thiab maj mam txias nws.Annealing rearranges lub microstructure ntawm cov khoom los txhim kho nws toughness thiab uniformity.
Kev ntxhov siab feem ntau ua tiav los ntawm kev ua kom sov cov khoom mus rau qhov kub thiab txias (feem ntau qis dua li ntawm annealing) ces tuav nws rau ib lub sij hawm thiab ces txias nws.Qhov no yuav pab tiv thaiv kom tsis txhob cuam tshuam lossis tawg ntawm cov khoom thaum lub sijhawm ua haujlwm tom ntej xws li vuam lossis txiav.
Ntau zaus ntawm kev xeem: Ob qhov piv txwv ntawm cov yeeb nkab uas tau muab los ntawm txhua qhov ntau ntawm 500 daim los yog feem ntawm qhov ntawd, los yog ob qho piv txwv ntawm cov khoom siv tiaj tus dov los ntawm txhua qhov ntau ntawm cov khoom sib txuas ntawm cov khoom siv tiaj tus.
Cov txheej txheem sim: Cov txheej txheem thiab kev coj ua ntsig txog kev tshuaj xyuas tshuaj yuav tsum ua raws li Txoj Cai Kev Xeem, Kev Coj Ua, thiab Cov Lus Qhia A751.
| Chemical Requirements,% | |||
| Kev sib xyaw | Qib C | ||
| Kev Ntsuas Kub | Kev tshuaj xyuas khoom | ||
| C (Carbon)A | max | 0.23 | 0.27 ib |
| Manganese (Mn)A | max | 1.35 Nws | 1.40 Nws |
| P (phosphorus) | max | 0.035 ib | 0.045 ib |
| S (Sulfur) | max | 0.035 ib | 0.045 ib |
| Kub (Copper)B | min | 0.20 ib | 0.18 |
| ARau txhua qhov kev txo qis ntawm 0.01 feem pua ntawm cov ntsiab lus qis dua qhov siab tshaj plaws rau cov pa roj carbon, qhov nce ntawm 0.06 feem pua ntawm cov ntsiab lus siab tshaj qhov tau teev tseg rau manganese tau tso cai, nce mus txog qhov siab tshaj ntawm 1.50% los ntawm kev ntsuas kub thiab 1.60% los ntawm cov khoom lag luam tsom. Blf tooj liab-muaj steel yog teev nyob rau hauv kev yuav khoom. | |||
Tensile specimens yuav tsum ua raws li qhov yuav tsum tau muaj ntawm Test Methods and Definitions A370, Appendix A2.
| Tensile Requirements | ||
| Sau npe | Qib C | |
| Tensile zog, min | psi | 62,000 ib |
| MPa | 425 | |
| Yield zog, min | psi | 50,000 |
| MPa | 345 | |
| Elongation hauv 2 nti (50 mm), min,C | % | 21B |
| BSiv rau cov phab ntsa thicknesses (t) sib npaug los yog ntau tshaj 0.120 in. [3.05mm].Rau qhov sib zog teev cov phab ntsa thicknesses, qhov tsawg kawg nkaus elongation qhov tseem ceeb yuav tsum tau pom zoo nrog cov chaw tsim khoom. 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. | ||
Hauv kev sim, cov qauv muab tso rau hauv lub tshuab ntsuas tensile thiab maj mam ncab kom txog thaum nws tawg.Thoob plaws hauv cov txheej txheem, lub tshuab kuaj ntsuas cov ntaub ntawv kev ntxhov siab thiab kev lim dej, yog li tsim kom muaj kev ntxhov siab-strain nkhaus.Qhov nkhaus no tso cai rau peb pom tag nrho cov txheej txheem los ntawm elastic deformation mus rau yas deformation rau rupture, thiab kom tau txais lub zog tawm los, tensile zog thiab elongation cov ntaub ntawv.
Qauv Length: Qhov ntev ntawm cov qauv siv los kuaj yuav tsum tsis pub tsawg dua 2 1/2 hauv (65 mm).
Kev kuaj ductility: Tsis muaj kev tawg los yog tawg, cov qauv yog flattened ntawm cov phaj sib npaug kom txog thaum qhov kev ncua deb ntawm daim hlau yog tsawg dua tus nqi "H" xam los ntawm cov qauv hauv qab no:
H=(1+e)t/(e+t/D)
H = nrug ntawm flattening daim hlau, hauv. [mm],
e = deformation rau ib chav tsev ntev (qhov tsis tu ncua rau qib ntawm cov hlau, 0.07 rau Qib B, thiab 0.06 rau Qib C),
t = teev phab ntsa thickness ntawm tubing, hauv. [mm],
D = teev sab nraud txoj kab uas hla ntawm tubing, in. [mm].
Kev ncaj nceestyog: Txuas ntxiv kom tiaj tus qauv kom txog thaum cov qauv tawg lossis cov phab ntsa ntawm cov qauv sib ntsib.
Ua tsis tiavckev cai: Laminar tev lossis cov khoom tsis muaj zog uas pom thoob plaws hauv qhov kev sim flattening yuav yog lub hauv paus rau kev tsis lees paub.
Kev ntsuas flaring yog muaj rau cov raj puag ncig ≤ 254 mm (10 in) inch, tab sis tsis tas yuav tsum tau ua.
| Sau npe | Scope | Nco tseg |
| Sab nraud Diameter (OD) | ≤48mm (1.9 nyob rau hauv) | ± 0.5% |
| ≥50mm (2 nti) | ± 0.75% | |
| Phab ntsa Thickness (T) | Specified phab ntsa thickness | ≥90% |
| Ntev (L) | ≤6.5m (22ft) | 6mm (1/4in) - 13mm (1/2in) |
| ≥6.5m (22ft) | 6mm (1/4 ") - 19mm (3/4") | |
| Kev ncaj | Ntev yog nyob rau hauv imperial units (ft) | L / 40 |
| Length units yog metric (m) | L / 50 | |
| Tolerance yuav tsum tau rau qhov ntev uas muaj feem xyuam rau round structural steel | ||
Kev txiav txim siab tsis raug
Deg defects yuav tsum tau muab cais raws li qhov tsis xws luag thaum qhov tob ntawm qhov defect yog xws li qhov seem phab ntsa thickness tsawg dua 90% ntawm cov phab ntsa thickness.
Kev kho cov cim, cov pwm me lossis cov cim yob, lossis cov dents ntiav yuav tsis suav tias yog qhov tsis xws luag yog tias lawv tuaj yeem raug tshem tawm hauv qhov txwv ntawm phab ntsa tuab.Cov defects saum npoo no tsis tas yuav tsum tau tshem tawm.
Kho qhov tsis xws luag
Kev puas tsuaj nrog phab ntsa thicknesses txog li 33% ntawm cov thickness uas tau teev tseg yuav tsum tau muab tshem tawm los ntawm kev txiav los yog sib tsoo kom txog thaum cov hlau tsis muaj qhov tsis xws luag.
Yog tias tsim nyog tack welding, cov txheej txheem ntub dej yuav tsum siv.
Tom qab refinishing, ntau hlau yuav tsum tau muab tshem tawm kom tau ib tug du nto.
Tus neeg tsim khoom lub npe.hom, lossis cov cim lag luam;qhov kev qhia tshwj xeeb (xyoo ntawm qhov teeb meem tsis xav tau);thiab tsab ntawv qib.
Rau cov qauv yeeb nkab uas muaj sab nraud txoj kab uas hla ntawm 4 hauv [10 cm] lossis tsawg dua, cov ntaub ntawv qhia txog kev tso cai tau tso cai rau ntawm cov ntawv txuas nrog rau txhua pob ntawm cov yeeb nkab.
Kuj tseem muaj kev xaiv siv cov barcodes raws li kev txheeb xyuas ntxiv, thiab nws raug pom zoo tias cov barcodes ua raws li AIAG Standard B-1.
1. Kev tsim vaj tsev: Qib C steel feem ntau yog siv rau hauv kev tsim kho lub tsev uas yuav tsum muaj kev txhawb nqa.Nws tuaj yeem siv tau rau lub mainframes, lub ru tsev, cov plag tsev, thiab cov phab ntsa sab nrauv.
2. Infrastructure tej yaam num: Rau cov txuas hniav, cov qauv kos npe rau kev loj, thiab cov railings los muab kev txhawb nqa tsim nyog thiab kav ntev.
3. Kev lag luam chaw: nyob rau hauv kev tsim cov nroj tsuag thiab lwm yam kev lag luam ib puag ncig, nws tuaj yeem siv rau bracing, framing systems, thiab kab.
4. Cov qauv hluav taws xob tauj dua tshiab: Nws kuj tuaj yeem siv rau hauv kev tsim kho cua thiab hnub ci zog.
5. Cov chaw ua si thiab khoom siv: Cov qauv rau cov chaw ua kis las xws li cov tshuaj ntxuav tes, lub hom phiaj, thiab cov khoom siv qoj ib ce.
6. Agricultural tshuab: Nws tuaj yeem siv los tsim cov thav duab rau cov tshuab thiab cov chaw cia khoom.
Loj: Muab sab nraud txoj kab uas hla thiab phab ntsa thickness rau round tubing;muab sab nraud qhov ntev thiab phab ntsa thickness rau square thiab rectangular tubing.
Ntau: Qhia tag nrho qhov ntev (ko taw lossis meters) lossis tus naj npawb ntawm tus kheej qhov ntev yuav tsum tau ua.
Ntev: Qhia txog hom ntev uas yuav tsum tau muaj - random, ntau, lossis tshwj xeeb.
ASTM 500 specification: Muab lub xyoo ntawm kev tshaj tawm ntawm ASTM 500 specification.
Qib: Qhia cov khoom qib (B, C, lossis D).
Khoom Siv Lub Npe: Qhia tias cov khoom yog txias-tsim tubing.
Txoj kev tsim khoom: Tshaj tawm seb cov yeeb nkab yog seamless lossis welded.
Xaus siv: Piav qhia txog kev siv cov yeeb nkab
Cov Kev Cai Tshwj Xeeb: Sau lwm yam uas yuav tsum tau muaj los ntawm tus qauv specification.
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!
