ASTM A178 ERW Tubes

Resistance welding yog txheej txheem ntawm vuam los ntawm kev siv lub zog los ntawm ib qho electrode tom qab lub vuam tau sib sau ua ke, siv cov hluav taws xob tiv thaiv hluav taws xob los ntawm kev xa hluav taws xob los ntawm kev sib cuag ntawm cov pob qij txha thiab cov chaw nyob sib ze.

• Txuj: ASTM a178 (ASME Sa178)

Qib: Qib A Qib C Qib D

Loj: OD 1/2in-5in(12.7-127mm)

Phab ntsa thickness: {{0}}.035in-0.360in(0.9-9.1mm)

• Tshuaj muaj pes tsawg leeg ntawm ASTM A178

Cov ntsiab lus %	ASTM A178 Gr A / SA178A Cov Lus Qhia	ASTM A178 Gr C / SA178C	ASTM A178 Gr D / SA178D Cov Lus Qhia
	Tsawg carbon steel	Nruab nrab Carbon Steel	Manganess Hlau
C	0.06-0.18	0.35 Max	0.27 Max
Mn	0.27-0.63	0.80 Max	1.00-1.50
P	0.035	0.035	0.030
S	0.035	0.035	0.015
Si	...	...	0.10 Min.

• Mechanical Property ntawm ASTM A178

Yam khoom	ASTM A178 Gr A / SA178A Cov Lus Qhia	ASTM A178 Gr C / SA178C	ASTM A178 Gr D / SA178D Cov Lus Qhia
Tensile zog, min, ksi [MPa]	47[325]	60[415]	70[485]
Yield zog, min, ksi [MPa]	26[180]	37[255]	40[275]
Elongation hauv 2 nti lossis 50mm, min, %	35	30	30
Rau longitudinal strip xeem ib tug txiav rau	1.50A	1.50A	1.50A
Txhua1⁄32-hauv [0.8mm] txo cov phab ntsa thickness hauv qab 5⁄16in. [8 hli]
Los ntawm qhov tsawg kawg nkaus elongation ntawm cov ntsiab lus hauv qab no yuav tsum tau ua

• Sab nraud txoj kab uas hla thiab phab ntsa Thickness kam rau ua ntawm ASTM A178 raj

Sab nraud Diameter tol		Phab ntsa thickness tol
OD <50	± 0.05 hli	S <4mm	±12.5%
OD > 50	±1%	4--20 hli	+15/-12.5%
		S Ntau dua lossis sib npaug li 20mm	±12.5%

Hom kev tiv thaiv vuam

1. Qhov chaw vuam
Spot welding yog sib sau ua ke rau hauv lub puab tsaig sib koom ua ke, thiab nias ntawm ob lub electrodes, kev siv cov cua sov ua kom sov kom yaj lub hauv paus hlau, tsim cov welded pob qij txha tiv thaiv vuam txoj kev. Spot vuam yuav tsum tau siv rau nyias phaj vuam.
Spot welding txheej txheem:
(1) pre-pressure, kom ntseeg tau tias kev sib cuag zoo nrog lub workpiece.
(2) lub zog, thiaj li tsim cov welded nuclei thiab yas nplhaib.
(3) breakpoint forging, thiaj li hais tias lub molten core nyob rau hauv lub siab nyob rau hauv lub nruam kev ua ntawm txias crystallisation, tsim ntawm ntom ntaub, tsis shrinkage, tawg nyob rau hauv lub welded pob qij txha.
2. Seam vuam
Seam welding yog sib sau ua ke rau hauv lub puab tsaig lossis pob tw pob qij txha, thiab muab tso rau ntawm ob lub tshuab electrodes, cov menyuam pressurized weldments thiab rotating, nruam los yog sib cuam tshuam lub zog mov, tsim ib tug nruam weld kuj welding txoj kev.
Seam welding yuav tsum tau siv los welding ib ntus ntau dua, qhov yuav tsum tau ua ntawm cov qauv ntawm lub foob, phaj thickness ntawm tib yam li hauv qab no 3 hli.
3. Lub taub qab vuam
Butt welding yog ua kom cov welment raws tag nrho kev sib cuag nto welding kuj welding txoj kev.
(1) tiv thaiv taub qab vuam
Resistance butt welding yog sib sau ua ke cov welding rau hauv lub pob tw, kom lub ntsej muag kawg yog nyob rau hauv kev sib cuag nrog kev siv cov cua sov ua kom sov rau hauv lub xeev yas, thiab tom qab ntawd cov seem thiab siv lub zog forging sab saum toj kom tiav txoj kev vuam. .
Kev tiv thaiv pob tw vuam yuav tsum tau siv rau qhov yooj yim hla ntu, txoj kab uas hla lossis sab ntev tsawg dua 20mm thiab lub zog yuav tsum tsis txhob siab dhau.
(2) flash taub qab vuam
Flash pob tw vuam yog sib sau ua ke rau hauv pob qij txha, txuas lub hwj chim, kom nws lub ntsej muag kawg maj mam ze kom ua tiav cov kev sib cuag hauv zos, kev siv cov hluav taws xob tiv thaiv kom sov cov ntsiab lus sib cuag, nyob rau hauv qhov kev txiav txim siab tam sim no, ua rau flash, yog li ntawd. qhov kawg hlau melting mus txog rau thaum kawg ntawm ib tug tej yam tob nyob rau hauv lub Scope ntawm ib tug predetermined kub, lub hwj chim tawm thiab sai sai thov rau sab saum toj ntawm lub forging quab yuam kom tiav txoj kev vuam.
Flash vuam kev sib koom ua ke zoo yog qhov zoo dua li kev siv vuam, cov khoom siv ntawm cov vuam thiab cov khoom siv hauv paus yog qhov sib piv, thiab tsis tas yuav ntxuav qhov sib koom ua ntej vuam cov khoom ua ntej welded.
Flash taub qab vuam feem ntau yog siv rau hauv cov vuam ntawm qhov tseem ceeb weldments. Yuav tau welded nrog tib hlau, kuj yuav welded dissimilar hlau; tuaj yeem welded 0.01mm hlau, tuaj yeem welded 20000mm ntawm cov hlau rods thiab profiles.

A178 ERW steel yeeb nkab

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