ASTM A537 Qib 2yog lub siab -lub zog, quenched, thiab tempered carbon-manganese- silicon steel phaj feem ntau siv raufusion-welded siab hlab ntsha thiab cov qauv. Nws cov txiaj ntsig zoo tshaj plaws thiab lub zog tensile ua rau nws xaiv tus qauv rau kev lag luam ua haujlwm nyob rau hauv kev kub siab thiab kub hloov pauv.
Mechanical Properties
|
Qib |
Yield zog |
Tensile zog |
Elongation hauv 2 " |
|---|---|---|---|
|
A537 Chav Kawm 2 |
60 |
80 - 100 |
22 |
Tshuaj muaj pes tsawg leeg
|
C |
Mn 1) |
P 2) |
S 2) |
Si |
Cu |
Ni 1) |
Cr |
Mo |
|---|---|---|---|---|---|---|---|---|
|
0.24 |
1.60 |
0.020 |
0.010 |
0.50 |
0.35 |
0.25 |
0.25 |
0.080 |
Carbon sib npaug
|
Thickness (hauv) |
0.375 - 2.00 |
|---|---|
|
Yam CET (wt%) |
0.33 |
|
CEV (wt%) |
0.45 |
Formability zog
|
Thickness (hauv. [mm]) |
Khoov Axis Perpendicular rau Rolling Direction Hauv Radius, R (min.) |
Khoov Axis Perpendicular rau Rolling Direction Die Width, W (min.) |
Khoov Axis Parallel rau Rolling Direction Hauv Radius, R (min.) |
Khoov Axis Parallel rau Rolling Direction Die Width, W (min.) |
|---|---|---|---|---|
|
0.375 – 1.00 [9.5 – 25.4] |
1.5t |
8t |
2.25t |
10t |
|
1.00 – 2.00 [25.4 – 50.1] |
2.0t |
8t |
3.0t |
10t |
Weldability
|
Vuam txheej txheem |
Thickness (hauv. [mm]) |
Yam tsawg kawg nkaus Preheat thiab Interpass Kub (℃F [℃]) |
Cov khoom siv |
|---|---|---|---|
|
Shielded Hlau Arc (SMAW) |
Tsawg dua lossis sib npaug rau 3/4 [Less dua lossis sib npaug rau 19] |
50 [10] |
AWS E7015-X, E7016-X, E7018-X |
|
Shielded Hlau Arc (SMAW) |
>3/4 – 1.5 [19 – 38] |
50 [10] |
AWS E7015-X, E7016-X, E7018-X |
|
Shielded Hlau Arc (SMAW) |
>1.50 – 2.00 [>38 – 50] |
150 [65] |
AWS E7015-X, E7016-X, E7018-X |
|
Gas Metal Arc (GMAW) |
Tsawg dua lossis sib npaug rau 3/4 [Less dua lossis sib npaug rau 19] |
50 [10] |
AWS ER70S-X |
|
Gas Metal Arc (GMAW) |
>3/4 – 1.5 [19 – 38] |
50 [10] |
AWS ER70S-X |
|
Gas Metal Arc (GMAW) |
>1.50 – 2.00 [>38 – 50] |
150 [65] |
AWS ER70S-X |
|
Submerged Arc (SAW) |
Tsawg dua lossis sib npaug rau 3/4 [Less dua lossis sib npaug rau 19] |
50 [10] |
AWS F7XX-EXXX-XX |
|
Submerged Arc (SAW) |
>3/4 – 1.5 [19 – 38] |
50 [10] |
AWS F7XX-EXXX-XX |
|
Submerged Arc (SAW) |
>1.50 – 2.00 [>38 – 50] |
150 [65] |
AWS F7XX-EXXX-XX |
|
Flux Cored Arc (FCAW) |
Tsawg dua lossis sib npaug rau 3/4 [Less dua lossis sib npaug rau 19] |
50 [10] |
AWS E7XTX-X |
|
Flux Cored Arc (FCAW) |
>3/4 – 1.5 [19 – 38] |
50 [10] |
AWS E7XTX-X |
|
Flux Cored Arc (FCAW) |
>1.50 – 2.00 [>38 – 50] |
150 [65] |
AWS E7XTX-X |
Cov txheej txheem rau A537 Class 2 Steel
Quenching thiab Tempering (Q & T) txheej txheem:
A537 Chav Kawm 2 yuav tsum tau quenching thiab tempering. Ua ntej, nws yog austenitized ntawm qhov ntsuas kub, tom qab ntawd nrawm nrawm los tsim cov qauv martensitic. Ua raws li tempering ntawm 595-650℃(1100-1200℃F) los txhim kho toughness thiab txo cov kev ntxhov siab seem.
Charpy V-Ntch Impact Testing Process:
Rau qhov qis- ntsuas qhov kub thiab txias, qhov ntsuas tau ua ntawm -29℃(-20℃F). Cov qauv yog npaj raws li ASTM cov qauv, tom qab ntawd cuam tshuam los ntawm lub pendulum. Qhov tsawg kawg nkaus uas yuav tsum tau muaj zog yog 27 J (20 ft-lb) ib qho piv txwv los tiv thaiv kev tawg tawg.
Vuam txheej txheem:
Cov txheej txheem muaj xws li SMAW, GMAW, FCAW thiab SAW. Preheating yog pom zoo kom tsis txhob txias cracking, thiab tom qab-weld heat treatment (PWHT) yog ua tom qab vuam los xyuas kom meej cov khoom zoo ib yam nyob rau hauv weld cheeb tsam.
Txheej txheem kho saum npoo:
Kub- dov daim hlau yog pickled kom tshem tawm nplai, ces oiled los tiv thaiv xeb. Qhov no muab qhov chaw huv si rau kev ua haujlwm tom ntej xws li vuam thiab txheej.
Mechanical Test Process:
Dhau li ntawm kev ntsuam xyuas kev cuam tshuam, tensile, hardness thiab khoov kev sim yog ua. Tensile kuaj xyuas lub zog (485-620 MPa), thaum kuaj hardness kuaj xyuas kev kho cua sov.
Daim ntawv thov
Siab Vessel Manufacturing: Core daim ntawv thov teb, suav nrog cov cuab yeej tseem ceeb xws li roj thiab roj tso tsheb hlau luam, cov khoom siv hluav taws xob siab, thiab cov roj hluav taws xob reactors, uas yuav tsum tau txhim khu kev qha nruab nrab kub thiab siab ua haujlwm.
Offshore Engineering: Dav siv nyob rau hauv offshore platform siab tshuab, yoog mus rau hnyav offshore ua hauj lwm ib puag ncig nrog nws zoo heev toughness thiab lub zog.
Kev thauj kua dej: Siv rau hauv siab - cov kav dej xa dej siab, ua kom muaj kev nyab xeeb ntawm cov kua dej hauv nruab nrab kub thiab siab.
Industrial Pressure Containers: Tsim nyog rau kev tsim cov thawv ntim khoom uas xav tau los tiv thaiv qhov nruab nrab kub thiab siab, ua tau raws li qhov xav tau ntawm kev ua haujlwm tseem ceeb ntawm cov xwm txheej muaj feem cuam tshuam.
Cov Cai Thov
Qhov kub thiab txias: Haum rau nruab nrab -kev pabcuam kub. Qhov siab tshaj plaws kev nyab xeeb kev khiav hauj lwm kub yog 343℃(650℃F), thiab qhov kev pab cuam yam tsawg kawg nkaus kub yog -29℃(-20℃F). Dhau li ntawm qhov no, nws lub zog thiab lub zog yuav txo qis, uas yuav cuam tshuam rau kev nyab xeeb ntawm kev ua haujlwm.
Ib puag ncig tej yam kev mob: Adaptable rau me me kev lag luam ib puag ncig. Hauv cov xwm txheej hnyav corrosive (xws li marine, chemical industries), tiv thaiv - kev tiv thaiv corrosion xws li txheej los yog galvanizing yuav tsum tau coj los tiv thaiv xeb thiab txuas ntxiv kev pab cuam lub neej.
Cov xwm txheej siab: Tsim los rau nruab nrab thiab siab -siab ua hauj lwm tej yam kev mob, sib piv nws yam tsawg kawg nkaus yield zog ntawm 345 MPa thiab tensile lub zog ntawm 485-620 MPa, uas yog raws li ASTM A537 tus qauv yuav tsum tau rau kev siv lub nkoj siab.
Cov Txheej Txheem Ua Haujlwm: Vuam yuav tsum siv txoj kev tsim nyog xws li SMAW thiab GMAW, nrog rau kev ua kom sov ua ntej thiab tom qab-weld heat treatment (PWHT). Kev ua kom txias yuav tsum tsis txhob deformation ntau dhau, thiab kev kho kev ntxhov siab yuav tsum tau ua tom qab ua tiav.
Yog xav paub ntxiv txog GNEE cov khoom siv hlau, tiv tauj peb ntawm beam@gneesteelgroup.com. Peb tos ntsoov yuav ua haujlwm nrog koj.
Lub txee lub neej ntawm A537 Class 2 steel phaj yog dab tsi yog tias khaws cia zoo?
Thaum khaws cia rau hauv qhov chaw qhuav, npog qhov chaw (tso ntawm cov dej noo, ntsev, thiab cov khoom corrosive), A537 Class 2 daim hlau muaj lub neej txee tsis muaj hnub kawg. Kev khaws cia kom zoo tiv thaiv xeb thiab degradation, tswj lawv cov khoom qub thiab cov khoom zoo.
Dab tsi yog qhov ceev ntawm A537 Class 2 steel?
Qhov ceev ntawm A537 Class 2 steel yog kwv yees li 7.85 g / cm³ (0.284 lb / in³), tib yam li cov pa roj carbon ntau thiab tsawg- alloy steels. Tus nqi no yog siv rau kev xam qhov hnyav hauv cov khoom tsim thiab kev npaj thauj mus los.
Dab tsi yog qhov coefficient ntawm thermal expansion rau A537 Class 2 steel?
Lub coefficient ntawm thermal expansion rau A537 Class 2 yog kwv yees li 11.7 × 10⁻⁶ ib℃(6.5 × 10⁻⁶ ib℃F) ntawm 20℃thiab 300 degree. Cov cuab yeej no yog qhov tseem ceeb rau kev tsim cov khoom siv uas ua rau muaj qhov kub thiab txias.
Dab tsi ncej-weld kev kho cua sov (PWHT) tau pom zoo rau A537 Class 2 steel?
Pom zoo PWHT rau A537 Chav Kawm 2 yog tempering ntawm 595℃txog 650℃(1100℃F txog 1200℃F) rau lub sijhawm txaus, ua raws li qhov txias txias. Qhov no txo cov weld residual kev nyuaj siab, txhim kho toughness, thiab xyuas kom meej cov khoom zoo ib yam nyob rau hauv weld cheeb tsam.
A537 Class 2 steel puas tuaj yeem ua tshuab? Dab tsi machining tsis pom zoo?
Yog lawm, A537 Chav Kawm 2 tuaj yeem ua tshuab siv cov qauv txheej txheem. Cov kev pom zoo suav nrog kev siv siab -cov cuab yeej steel los yog carbide ceev, kev txiav cov kua dej kom zoo kom txo tau cov cua sov, thiab cov kev txiav nrawm thiab cov khoom noj kom tsis txhob muaj cov cuab yeej hnav thiab cov khoom puas.
Charpy V-qhov cuam tshuam rau lub zog xav tau rau A537 Class 2 steel yog dab tsi?
Ntawm -29℃(-20℃F), A537 Chav Kawm 2 yuav tsum muaj qhov tsawg kawg nkaus Charpy V-notch cuam tshuam lub zog ntawm 27 J (20 ft-lb) rau ib qho qauv. Qhov no ua kom cov hlau muaj qhov toughness txaus los tiv thaiv cov pob txha tawg nyob rau hauv kev cuam tshuam cov loads hauv qhov kev pabcuam kub qis.
Lub thickness ntawm A537 Class 2 steel cuam tshuam li cas rau nws cov khoom siv kho tshuab?
Thicker A537 Class 2 daim hlau yuav muaj zog dua me ntsis vim qhov txias dua thaum kho cua sov, ua rau coarser grain qauv. Yuav kom tswj tau cov khoom, cov phaj tuab yuav tsum tau tswj xyuas qhov kub thiab txias thiab ntsuas qhov cuam tshuam ntxiv.
Dab tsi yog qhov txawv ntawm A537 Chav Kawm 2 thiab A36 steel?
A537 Chav Kawm 2 yog quenched thiab tempered siab lub nkoj steel nrog lub zog siab dua (min tawm los 345 MPa vs. A36's 250 MPa) thiab zoo dua toughness, thaum A36 yog cov carbon structural steel rau kev tsim kho, nrog qis zog thiab ua haujlwm yooj yim.
Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm kev siv A537 Class 2 steel hauv kev tsim cov hlab ntsha siab?
Cov txiaj ntsig tseem ceeb muaj xws li lub zog siab - rau - qhov hnyav piv, weldability zoo heev, zoo tsis tshua muaj - kub toughness, ua raws li cov qauv ntawm lub nkoj siab (ASTM A537), thiab tsim nyog rau nruab nrab - qhov kub thiab txias kev pab cuam, ua kom muaj kev nyab xeeb thiab txhim khu kev qha ntawm cov khoom siv siab.