ASTM A537 Qib 1(A537 Cl.1) steel daim hlau yog carbon-manganese-silicon siab lub nkoj-zoo daim hlau muab nyob rau hauv lub normalized mob, feem ntau yog siv rau welded boilers thiab siab hlab ntsha uas yuav tsum tau muaj zog zoo thiab torque toughness; lawv raug tsim los rau qhov zoo austenitic grain loj rau kev txhim kho kev tiv thaiv rau cov pob txha tawg thiab cov yam ntxwv tswj cov chemistry kom sib npaug ntawm lub zog thiab weldability, ua rau lawv haum rau ntau hom kev pabcuam nruab nrab-siab-kub.
Tshuaj muaj pes tsawg leeg ntawm ASTM A537 Chav Kawm 1
|
Lub ntsiab |
Kev sib xyaw (%) |
|---|---|
|
Cov pa roj carbon (C) |
0.24 max |
|
Manganese (Mn) |
0.70-1.35 (≤40mm) 1.00-1.60 (>40mm) |
|
Phosphorus (P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Silicon (Si) |
0.15-0.50 |
|
Copper (Cu) |
0.35 max (yog tias muaj) |
|
Nickel (Ni) |
0.25 max (yog tias muaj) |
|
Chromium (Cr) |
0.25 max (yog tias muaj) |
|
Molybdenum (hli) |
0.08 max (yog tias muaj) |
Mechanical Properties ntawm ASTM A537 Chav Kawm 1
|
Khoom |
Tus nqi |
|---|---|
|
Tensile zog |
70-90 ksi (485-620 MPa) |
|
Yield zog |
50 ksi (345 MPa) min (tsawg dua lossis sib npaug li 65 hli) |
|
Elongation (hauv 50mm) |
22% min |
Cov yam ntxwv tseem ceeb:
Khoom siv:Carbon, Manganese, Silicon hlau.
Kev kho cua sov:Muab tso rau hauvLi qubmob.
Daim ntawv thov:Cov hlab ntsha siab, boilers, cia tso tsheb hlau luam (API 650/620), tshwj xeeb tshaj yog qhov uas yuav tsum tau muaj kev sib tw zoo heev rau qhov nruab nrab / qis dua.
Khoom (vs. Class 2):Lub zog siab dua tab sis qis qis zog (min 50 ksi) dua li Chav Kawm 2 (min 60 ksi).
Weldability:Zoo weldability thiab fabrication zog.
Vim li cas nws thiaj siv:
Nws muab tus nqi -kev daws teeb meem zoo rau cov ntawv thov uas yuav tsum tau txhim kho cov khoom siv kho tshuab (lub zog thiab lub zog) dhau ntawm cov pa roj carbon hlau yooj yim, tsis muaj qhov nyuaj ntxiv thiab tus nqi ntawm Chav Kawm 2's quenching thiab tempering.
txheej txheem txheej txheem
• Melting thiab refining kom ua tiav tag nrho deoxidation thiab nplua nplej loj
• Kev kho cua sov li qub los kho cov txheej txheem microstructure thiab tsim kom muaj zog thiab tawv
• Txiav thiab kev npaj nto, nrog rau kev tshem tawm cov npoo tawv lossis cua sov- thaj chaw cuam tshuam
• Kev tsim los ntawm txoj kev txias los yog tswj kev ua kom kub, nrog rov ua dua -yog tias xav tau
• Vuam siv tsawg- hydrogen consumables thiab preheat thiab interpass tswj kom zoo
• Tshaj tawm -weld kev kho cua sov kom txo qis kev ntxhov siab
• Kev tshuaj xyuas zaum kawg thiab kev kuaj xyuas kom paub tseeb tias cov khoom siv kho tshuab thiab cov suab nrov sab hauv
Thov kev tshaj lij rau ASTM A537 Chav Kawm 1 los ntawm GNEE Steel.
Puas yog ASTM A537 Class 1 weldable?
Yog, nws muaj zoo weldability. Preheating thiab post-weld heat treatment (PWHT) raug pom zoo kom tiv thaiv kom txhob mob khaub thuas thiab txo cov kev ntxhov siab, tshwj xeeb tshaj yog rau cov ntu tuab lossis cov kev pabcuam hnyav.
Yam tshuaj muaj pes tsawg leeg yog dab tsi?
Nws muaj 0.18-0.28% carbon, 1.00-1.60% manganese, 0.15-0.35% silicon, Tsawg dua los yog sib npaug rau 0.035% phosphorus, Tsawg dua los yog sib npaug rau 0.035% sulfur, thiab cov kab ntawm lwm cov ntsiab lus, ntsuas lub zog thiab muaj zog.
Qhov ntsuas kub npaum li cas nws haum rau?
Nws ua tau zoo ntawm -20℃F (-29 degree) txog 650℃F (343℃). Tshaj li qhov no, nws cov khoom siv kho tshuab tuaj yeem degrade, yog li nws tsis pom zoo rau qhov kev pabcuam siab lossis kub qis yam tsis muaj kev ntsuas.
Dab tsi yog cov ntawv thov ntawm ASTM A537 Class 1?
Cov kev siv feem ntau suav nrog cov hlab ntsha siab, boilers, cov tso tsheb hlau luam, thiab cov khoom siv hauv cov roj, roj, petrochemical, thiab hluav taws xob tsim kev lag luam, qhov chaw siab thiab nruab nrab kub kuj tseem ceeb heev.
Nws puas yuav tsum tau kuaj xyuas?
Yog lawm, Charpy V-kev ntsuas qhov cuam tshuam yog qhov yuav tsum tau ua. Ntawm -20℃F (-29 degree), qhov tsawg kawg nkaus absorbed zog yog 20 ft-lb (27 J) rau cov qauv, kom muaj zog txaus los tiv thaiv nkig tawg.
ASTM A537 Class 1 muab tau li cas?
Nws tau muab los ua daim hlau nyob rau hauv quenched thiab tempered mob, nrog zeb xeem ntawv qhia (MTRs) certification tshuaj muaj pes tsawg leeg, mechanical zog, thiab tshav kub kev kho mob, xyuas kom meej traceability thiab ua raws li.
Cov kev txwv ntawm ASTM A537 Class 1 yog dab tsi?
It's not suitable for cryogenic or extreme high-temperature (>650℃F / 343 degree) kev pabcuam. Nws muaj qhov txwv tsis pub muaj kev tiv thaiv corrosion nyob rau hauv ib puag ncig hnyav thiab yuav tsum tau vuam / PWHT kom tsis txhob muaj teeb meem kev ua haujlwm.
Nws puas tuaj yeem hardened ntxiv tom qab fabrication?
Re- hardening tsis pom zoo, vim nws yuav ua rau cov khoom tsis sib xws lossis tawg. Yog xav tau lub zog ntxiv, xaiv ASTM A537 Chav Kawm 2 lossis hlau alloy yog qhov zoo dua tom qab-fabrication hardening.
Qhov siab tshaj carbon sib npaug (CE) tus nqi yog dab tsi?
Cov pa roj carbon sib npaug, suav los ntawm cov qauv zoo li IIW, feem ntau Tsawg dua lossis sib npaug li 0.45% kom ntseeg tau tias muaj kev sib tw. CE siab dua yuav ua rau muaj kev pheej hmoo ntawm kev tawg, yog li yuav tsum muaj kev tswj hwm nruj ntawm cov tshuaj muaj pes tsawg leeg.