ASTM A537 Qib 1yog ib qho normalized, cua sov-kho carbon-manganese-silicon steel phaj rau fusion-welded siab hlab ntsha thiab tso tsheb hlau luam, muab lub zog zoo thiab tawv tawv rau nruab nrab qhov kub thiab txias, txawv ntawm Chav Kawm 2 (quenched & tempered) los ntawm nws cov kev kho cua sov me ntsis thiab qis zog me ntsis, ua rau nws tsim nyog rau cov txheej txheem boilers.
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 |
Mechanical Properties
|
Qib |
Yield zog |
Tensile zog |
Elongation hauv 2 " |
Elongation hauv 8 " |
|---|---|---|---|---|
|
A537 Chav Kawm 1 |
50 |
70 - 90 |
22 |
18 |
Cov ntaub ntawv sib npaug rau ASTM A537 Chav Kawm 1
|
Txheem / Lub Tebchaws |
Qib / sib npaug |
Ntsiab nta |
|---|---|---|
|
ASME (USA) |
SA537 Chav Kawm 1 |
Zoo tib yam rau A537 |
|
EN (EU) |
P355GH |
Normalized, tawm los 355 MPa |
|
DIN (Lub teb chaws Yelemees) |
19mn 6 |
Creep -resistant |
|
JIS (Nyiv) |
SPV355 |
Zoo weldability |
|
GB (Tuam Tshoj) |
16 MnR |
Zoo sib xws zog |
txheej txheem
• Melting thiab Refining: Ua raws li cov hlau tua tag nrog zoo austenitic grain loj xyaum ua kom zoo toughness thiab soundness.
• Normalizing Kev kho cua sov: Heated uniformly saum toj qhov tseem ceeb kub thiab txias hauv huab cua kom refine microstructure thiab ua kom tiav lub zog thiab toughness.
• Txiav thiab Deg Kev Npaj: Thermal cutting (plasma los yog oxy-roj) ua raws li cov ntug txias kom tshem tawm cov txheej tawv tawv lossis cua sov- thaj chaw cuam tshuam ua ntej vuam lossis sib sau.
• tsim: Cov txheej txheem txias yog nyiam; yog siv cov txheej kub kub thiab qhov kub thiab txias tshaj qhov tseem ceeb, re- yuav tsum tau ua kom rov zoo li qub rau Class 1 cov khoom.
• Vuam: Welded siv qis -hydrogen consumables nrog tsim nyog preheat thiab interpass kub tswj kom tsis txhob txias cracking.
• Tshaj tawm -Kev kho cua sov (PWHT): Kev txo kev ntxhov siab feem ntau yog siv los txo cov kev ntxhov siab seem thiab txhim kho qhov ruaj khov.
• Kev tshuaj xyuas thiab kuaj: Kev ntsuam xyuas tshuab (nruj thiab cuam tshuam) thiab tsis yog -kev kuaj xyuas kev puas tsuaj (ultrasonic testing) kom ua raws li cov lus qhia tshwj xeeb.
Daim ntawv thov
• Welded siab hlab ntsha
• Boilers thiab kub exchangers
• Cia tanks thiab siab -muaj cov qauv
• Heavy welded fabrications
• Cov ntawv thov kev pab cuam kub nruab nrab mus rau siab
Qhov zoo
• Zoo weldability nrog preheat kom zoo thiab tsawg -hydrogen xyaum
• Fine-grained microstructure muab zoo heev notch toughness
• Cov khoom muaj zog zoo ib yam vim yog qhov yuav tsum tau ua kom normalization
• Haum rau ntau yam kev tsim thiab fabrication txheej txheem
• Tus nqi - zoo thiab txhim khu kev qha rau kev siv lub nkoj siab
Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.
Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.
Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.
Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)
Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.
Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.
Yog tias koj muaj qhov yuav tsum tau ua rau ASTM A537 Chav Kawm 1, peb txais tos koj nug. GNEE tuav cov khoom lag luam loj uas feem ntau siv cov qib siab zog steel rau koj xaiv.Rau cov ncauj lus kom ntxaws cov khoom siv, tshuaj muaj pes tsawg leeg, thiab cov ntaub ntawv kev, nrog rau cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw, ruaj khov zoo, thiab kev pabcuam tshaj lij. Email: beam@gneesteelgroup.com.
Dab tsi yog cov txheej txheem tseem ceeb ntawm ASTM A537 Chav Kawm 1?
Cov txheej txheem tseem ceeb suav nrog kev txiav (plasma, oxy- roj), kev sib sau (tso txias ua nrog tom qab- kho cua sov), vuam (nrog preheating / PWHT), thiab machining. Kev tswj xyuas nruj ntawm cov khoom siv hluav taws xob thaum lub sij hawm vuam thiab kev sib sau khaws cia cov khoom siv kho tshuab, ua kom muaj kev ua raws li cov qauv ntawm cov hlab ntsha siab.
Dab tsi preheating kub yog pom zoo rau welding?
Preheating rau 200-300℃F (93-149 degree) yog pom zoo, tshwj xeeb tshaj yog rau cov phaj tuab dua 1 nti. Qhov no txo qhov kub ntawm gradient, tiv thaiv kev sib tsoo ntawm qhov kub thiab txias, thiab txhim kho vuam fusion, tswj cov khoom toughness thiab lub zog.
Puas yog ASTM A537 Chav Kawm 1 xav tau kev ntxhov siab tom qab tsim?
Yog lawm, kev daws kev ntxhov siab (ntawm 1100-1200℃F / 593-649 degree) yog xav tau tom qab kev tsim hnyav. Nws tshem tawm cov kev ntxhov siab uas nyob ntawm qhov deformation, txo qhov kev pheej hmoo ntawm kev tawg, thiab kho cov khoom siv ductility thiab toughness kom ua tau raws li cov qauv tsim.
Dab tsi yog qhov cua sov- cuam tshuam cheeb tsam (HAZ) tus cwj pwm thaum vuam?
Lub HAZ tuaj yeem ntsib cov nplej coarsening yog tias cov khoom siv hluav taws xob ntau dhau. Preheating kom zoo, tswj vuam tsis, thiab PWHT refine HAZ grain qauv, tiv thaiv brittleness thiab kom ntseeg tau tias HAZ phim lub hauv paus hlau cov cuab yeej.
ASTM A537 Chav Kawm 1 puas tuaj yeem ua tau yooj yim?
Yog lawm, nws muaj qhov ua tau zoo vim nws qhov quenched -tempered microstructure. Siv cov cuab yeej siab - ceev steel lossis carbide nrog kev txiav nrawm thiab pub. Tsis txhob kub dhau thaum lub sij hawm machining los tiv thaiv qhov tawv tawv thiab poob ntawm toughness.
Dab tsi yog qhov yuav tsum tau ua rau kev npaj ntug ua ntej vuam?
Ntug yuav tsum tau beveled (V-groove, U-groove) kom paub meej tias nkag mus. Lawv yuav tsum huv si - tsis muaj roj, xeb, nplai, lossis pleev xim - txog li 1 nti ntawm qhov sib txuas. Kev npaj ntug kom zoo txhim kho weld zoo thiab tsis txhob porosity lossis tsis tiav fusion.
Qhov kub li cas cuam tshuam rau nws cov khoom siv kho tshuab?
Tshaj 650℃F (343 degree), tensile lub zog thiab toughness maj mam txo. Hauv qab no -20℃F (-29 degree), nws yuav ua nkig. Nyob rau hauv nws cov kev pab cuam, cov khoom nyob ruaj khov, ua rau nws txhim khu kev qha rau nruab nrab-qhov kub thiab txias kev siv.
Yuav tsum muaj ntawv pov thawj dab tsi rau ASTM A537 Class 1 daim hlau?
Cov phaj yuav tsum tau ntawv pov thawj rau ASTM A537, nrog MTRs (Mill Test Reports) ib EN 10204 3.1 lossis 3.2. Qee qhov kev lag luam xav tau cov ntawv pov thawj ntxiv xws li ASME BPVC Tshooj VIII stamp kom paub meej tias kev ua raws li kev siv lub nkoj siab.
Dab tsi yog qhov cuam tshuam ntawm sulfur cov ntsiab lus ntawm nws qhov kev ua tau zoo?
Sulfur yog txwv kom tsawg dua los yog sib npaug li 0.035% kom tsis txhob kub tawg thaum vuam thiab txo qhov brittleness. Ntau cov sulfur forms sulfide inclusions, uas degrade toughness thiab ductility, compromising cov khoom tsim nyog rau kev pab cuam.
Nws puas tuaj yeem siv rau hauv kev pabcuam hydrogen?
Nws tuaj yeem siv rau hauv qis - kev pabcuam hydrogen nrog kev ntsuas kom raug. Rau siab - siab hydrogen, nws yuav raug rau hydrogen embrittlement. PWHT thiab kev tswj nruj ntawm impurities pab txo qhov kev pheej hmoo no, tab sis kev sib raug zoo nyob ntawm cov kev pabcuam.