ASTM A537 Qib 2yog lub tshav kub-kho carbon-manganese- silicon steel phaj, quenched thiab tempered rau lub zog muaj zog, siv feem ntau rau fusion-welded siab hlab ntsha, boilers, tso tsheb hlau luam (xws li API 650/620), thiab cov qauv nyob rau hauv cov roj, roj, thiab petrochemical kev lag luam yog siab dua tensile zog. Nws muaj kev txhim kho qhov tsis sib haum xeeb thiab zoo weldability, nrog rau cov khoom siv kho mob uas tshwm sim los ntawm nws cov tshuaj muaj pes tsawg leeg thiab kev kho cua sov.
| Lub cev muaj zog | Metric | Lus Askiv | Cov lus pom |
|---|---|---|---|
| Qhov ntom | 7.80 g / ct | 0.282 lb/in³ | Hom ntawm ASTM Steel |
| Mechanical Properties | Metric | Lus Askiv | Cov lus pom |
| Tensile Strength, Qhov kawg | 485 - 620 MPa | 70300 - 89900 psi | |
| Tensile zog, tawm los | 315 MPa rau | 45 700 psi | |
| Elongation ntawm Break | 20 % | 20 % | hauv 50mm |
| Modulus ntawm Elasticity | 200 GPa | 29 000 ksg | Hom Carbon Steel |
| Bulk Modulus | 160 GPa | 23 200 TZS | Hom rau Steel |
| Poissons Ratio | 0.29 | 0.29 | Hom Carbon Steel |
| Shear Modulus | 80.0 GPA | 11600 Nws | Hom rau Steel |
| Cov khoom hluav taws xob | Metric | Lus Askiv | Cov lus pom |
| Hluav taws xob Resistivity | 0.0000170 ohm -cm | 0.0000170 ohm -cm | Hom Carbon Steel |
| Thermal Properties | Metric | Lus Askiv | Cov lus pom |
| CTE, linear | 12.0 µm/m - degree | 6.67 µin/in -℃F | Hom Carbon Steel |
| Tshwj xeeb kub muaj peev xwm | 0.470 J/g- degree | 0.112 BTU/lb-℃F | Hom Carbon Steel |
| Thermal conductivity | 52.0 W/m-K | 361 BTU-in/hr-ft²-℃F | Hom Carbon Steel |
| Component Elements Properties | Metric | Lus Askiv | Cov lus pom |
| Carbon, C | 0.24 % | 0.24 % | |
| Chromium, Cr | 0.25 % | 0.25 % | |
| tooj, Cu | 0.35 % | 0.35 % | |
| Hlau, Fe | 97.28 % | 97.28 % | raws li qhov sib npaug |
| Manganese, Mn | 0.70 - 1.6 % | 0.70 - 1.6 % | |
| Molybdenum, Mo | 0.080 % | 0.080 % | |
| Nickel, Nia | 0.25 % | 0.25 % | |
| Phosphorus, P | 0.035 % | 0.035 % | |
| Silicon, Sib | 0.15 - 0.50 % | 0.15 - 0.50 % | |
| Sulfur, S | 0.040 % | 0.040 % | |
A537 Chav Kawm 2 Hlau Phaj Hom Kev Ua Haujlwm
Raw Material Receipt
Tau txais A537 Class 2 steel daim hlau los ntawm cov neeg muag khoom tsim nyog.
Txheeb xyuas cov ntaub ntawv pov thawj, suav nrog tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab cov ntaub ntawv kho cua sov.
Ua qhov kev tshuaj xyuas qhov pom ntawm qhov tsis xws luag, thickness sib xws, thiab qhov ntev.
Ua ntej-Kev Npaj Ua Haujlwm
Tshawb xyuas engineering drawings thiab txheej txheem yuav tsum tau.
Txiav txim siab txoj kev txiav, xws li nplaim taws, txiav plasma, los yog shearing.
Kos cov phiaj raws li txoj kev npaj.
Txiav
Txiav daim hlau mus rau qhov ntau thiab tsawg uas siv txoj kev txiav txiav.
Tshem tawm cov tawv nqaij, slag, thiab cov npoo ntse.
Txheeb xyuas qhov ntev thiab squareness.
Kev tsim kho (yog tias xav tau)
Ua dabtsi yog khoov, dov, los yog nias ua raws li tus qauv tsim.
Tswj qhov kub thiab txias thiab tsis txhob overheating.
Txheeb xyuas cov duab uas tsim los siv cov qauv lossis cov cuab yeej ntsuas.
Kev npaj vuam
Npaj cov pob qij txha los ntawm beveling, sib tsoo, lossis machining.
Ntxuav cov khoom sib txuas kom tshem tawm cov roj, xeb, thiab cov kab mob.
Xaiv cov khoom siv vuam tsim nyog tau sib xws nrog A537 Chav Kawm 2.
Vuam
Siv cov txheej txheem vuam tsim nyog xws li SMAW, GMAW, FCAW, lossis SAW.
Ua raws li WPS pom zoo (Vuam txheej txheem Specification).
Tswj interpass kub thiab cua sov input kom tiv thaiv embrittlement.
Ua qhov pom kev tshuaj xyuas ntawm welds tom qab ua tiav.
Tshaj tawm -Kev kho cua sov (PWHT)
Ua kom muaj kev ntxhov siab rau kev kho cua sov yog tias xav tau los ntawm qhov tshwj xeeb lossis tsim qauv.
Hom PWHT kub ntau: 595-650℃(1100-1200℃F).
Tswj cov cua sov thiab cua txias kom tsis txhob thermal shock.
Tshuab dhos
Ua haujlwm machining xws li drilling, milling, lossis tig kom ua tiav qhov ntev kawg.
Xyuas kom tiav nto ua tau raws li cov qauv xav tau.
Kev tshuaj xyuas thiab kuaj
Ua qhov ntsuas qhov ntsuas.
Ua tsis yog -kev kuaj kev puas tsuaj (NDT) xws li UT, MT, PT, lossis RT raws li tau teev tseg.
Txheeb xyuas cov khoom siv tshuab yog tias xav tau.
Kev kho saum npoo
Ntxuav cov khoom kawg kom tshem tawm cov nplai, weld spatter, thiab khib nyiab.
Siv cov txheej tiv thaiv, pleev xim, lossis tiv thaiv- kev kho corrosion raws li xav tau.
Kev Tshawb Fawb Kawg thiab Ntim
Tshawb xyuas tag nrho cov ntaub ntawv soj ntsuam thiab cov ntaub ntawv.
Paub meej tias cov khoom ua tau raws li txhua tus neeg siv khoom thiab cov kev xav tau tshwj xeeb.
Ntim thiab sau cov khoom tiav rau kev xa khoom.
Daim ntawv thov
Cov hlab ntsha siab, boilers, kub exchangers (kub nruab nrab, siab scenarios).
Petroleum, chemical cia tanks (saum toj no - hauv av / ib nrab underground).
Roj & roj, cov khoom siv petrochemical (separators, reactors, piping Cheebtsam).
Fais fab nroj tsuag qhov chaw (boiler nruas, headers) thiab hnyav fabrications (offshore qauv).
Qhov zoo
Lub zog siab -rau- qhov hnyav piv, ua kom cov ntu nyias nyias thiab txo qhov hnyav.
Weldability zoo heev nrog cov txheej txheem ntau, txo cov nqi tsim khoom / sijhawm.
Zoo toughness ntawm nruab nrab kub, ua kom muaj kev ruaj ntseg.
quenched & tempered, nrog uniform microstructure thiab zoo ib yam khoom.
Tus nqi -zoo, ua raws li ASME cov qauv, thiab muaj dav dav.
Yog tias koj xav kawm ntxiv txog (a537 chav kawm 2)GNEE cov khoom, koj tuaj yeem xa email rau beam@gneesteelgroup.com. Peb zoo siab tshaj los pab koj.
A537 Chav Kawm 2 yog dab tsi?
A537 Class 2 yog cov pa roj carbon -manganese alloy steel phaj, normalized thiab npaj rau kev siv lub nkoj siab. Nws muaj qhov zoo tshaj plaws weldability thiab lub zog nruab nrab, haum rau qis - kev pabcuam kub mus txog -20℃F (-29℃). Dav siv nyob rau hauv cov roj, roj, thiab petrochemical kev lag luam vim nws kev ntseeg siab nyob rau hauv siab.
Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm A537 Chav Kawm 2?
Nws cov khoom tseem ceeb suav nrog C (0.18-0.25%), Mn (1.00-1.60%), P (max 0.035%), S (max. 0.035%), Si (0.15-0.35%), Ni (max 0.25%), Cr (max 0.25%), Mo (max. Cu, max 0.10%). Cov khoom no sib npaug zog, ductility, thiab weldability rau kev siv lub nkoj siab.
Qhov tsawg kawg nkaus tensile lub zog ntawm A537 Chav Kawm 2 yog dab tsi?
Qhov tsawg kawg nkaus tensile lub zog ntawm A537 Chav Kawm 2 yog 60 ksi (414 MPa), nrog rau qhov tsawg kawg nkaus lub zog ntawm 38 ksi (262 MPa). Qib no lub zog ua rau nws haum rau nruab nrab - kev siv siab, sib txuas cov load- cov kabmob muaj peev xwm nrog cov ductility txaus los tiv thaiv cov pob txha tawg.
Dab tsi yog txheej txheem kev kho cua sov rau A537 Chav Kawm 2?
A537 Chav Kawm 2 yuav tsum ua kom zoo li qub: cua sov rau 1650-1750℃F (900-955 degree), tuav lub sijhawm txaus, tom qab ntawd cua txias. Cov txheej txheem no ua kom zoo dua cov qauv nplej, txhim kho toughness, thiab ua kom cov khoom siv sib xyaw ua ke thoob plaws lub phaj, tseem ceeb rau kev nyab xeeb ntawm cov hlab ntsha.
Dab tsi yog qhov siab tshaj plaws thickness muaj rau A537 Chav Kawm 2?
A537 Class 2 feem ntau muaj nyob rau hauv thicknesses ntawm 3/16 nti (4.8 mm) mus rau 4 nti (101.6 mm). Cov phaj tuab tuaj yeem xav tau kev sim ntxiv kom paub meej tias cov khoom siv kho tshuab, vim tias thickness cuam tshuam rau kev kho cua sov sib xws thiab kev ua haujlwm tag nrho.
Puas yog A537 Chav Kawm 2 haum rau qis-kev pabcuam kub?
Yog lawm, nws yog qhov tsim nyog rau qis - kev pabcuam kub mus rau -20℃F (-29℃). Nws cov microstructure normalized muab zoo toughness ntawm qhov kub thiab txias, tsis txhob nkig tawg. Rau qhov chaw txias dua, lwm qib zoo li A516 Gr. 70 nrog cov kev xav tau qis dua yuav tsis siv-A537 Chav Kawm 2 yog qhov nyiam ntawm no.
Cov txheej txheem vuam zoo li cas nrog A537 Chav Kawm 2?
Nws yog sib xws nrog cov txheej txheem vuam: SMAW (stick welding), GMAW (MIG), GTAW (TIG), thiab SAW (submerged arc vuam). Preheating (150-300℃F / 65-149 degree) tej zaum yuav xav tau rau cov ntu tuab los tiv thaiv kev sib tsoo, nrog rau kev kho cua sov tom qab vuam xaiv rau kev ntxhov siab.
Dab tsi yog qhov yuav tsum tau xeem qhov cuam tshuam rau A537 Chav Kawm 2?
Nws yuav tsum tau Charpy V-notch (CVN) kev ntsuam xyuas ntawm -20℃F (-29 degree), nrog rau qhov tsawg kawg nkaus qhov nruab nrab ntawm lub zog ntawm 20 ft-lb (27 J) rau peb qhov qauv. Tus nqi ntawm tus kheej yuav tsum tsis txhob qis dua 15 ft-lb (20 J), kom ntseeg tau tias muaj zog tiv thaiv kev thauj khoom tam sim lossis qhov kub thiab txias.
Cov kev lag luam twg siv A537 Chav Kawm 2?
Kev lag luam tseem ceeb muaj xws li roj thiab roj (cov tank cia, cov kav dej), petrochemicals (reactors, separators), lub zog tsim hluav taws xob (boiler Cheebtsam), thiab marine (nkoj hulls, siab hlab ntsha). Nws lub siab tsis kam thiab weldability ua rau nws zoo tagnrho rau hnyav kev lag luam ib puag ncig.