ASME SA387 Gr.5 alloy steel phaj yog chromium-molybdenum alloy siab nkoj steels tsim raws li ASME Boiler thiab Pressure Vessel Code (BPVC). Muaj kwv yees li 5% chromium thiab 0.5% molybdenum, cov hlau no yog tsim los ua kom muaj kev ua haujlwm zoo heev - kub lub zog, oxidation tsis kam, thiab ntev - lub sij hawm creep kuj. Yuav kom ua tau raws li qhov xav tau ntawm ntau lub nkoj tsim, cov phaj no feem ntau yog muab rau hauv Chav Kawm 1 lossis Chav Kawm 2 cua sov- kho mob.
Raws li lub caij nyoog chaw tsim tshuaj paus ntawm siab hlab ntsha steel daim hlau, GNEE Steel muab SA387 Gr.5 daim hlau nyob rau hauv thicknesses li ntawm 6 mus rau 300 hli, muab ultrasonic kuaj (UT), EN 10204 3.1/3.2 ntawv pov thawj, thiab kev cai fabrication kev pab cuam.
ASME SA387 Gr.5 alloy steel phaj Specification
| Yam khoom | Specification |
|---|---|
| Khoom Txheem | ASME SA387 / ASTM A387 Cov Lus Qhia |
| Qib | SA387 Qib 5 / ASTM A387 Qib 5 |
| Chav kawm | Chav Kawm 1, Chav Kawm 2 |
| Hom hlau | Chromium{0}}Molybdenum Alloy Pressure Vessel Steel |
| Chromium Cov ntsiab lus | Kwv yees li 4.00–6.00% |
| Molybdenum Cov ntsiab lus | Kwv yees li 0.45-0.65% |
| Thickness | 6-300 hli |
| Dav | 1,500–4,000 mm |
| Ntev | 3,000–18,000 mm |
| Phaj Zoo | Raws li Rolled, Txiav - mus rau -Size |
| Kev Xa Khoom | Normalized (Class 1); Normalized & Tempered (Class 2) * |
ASME SA387 Gr.5 alloy steel phaj Chemical Composition
| C | Mn | P | S | Si | Cr | Mo |
| 0.15 max | 0.25 - 0.66 | 0.035 | 0.030 | 0.55 max | 3.9 - 6.1 | 0.40 - 0.7 |
ASME SA387 Gr.5 alloy steel phaj Mechanical Property
| A387 / SA387 Qib 5 | Chav Kawm 1 | Chav kawm 2 |
| Tensile zog (ksi) | 60-85 | 75-100 |
| Tensile zog (MPa) | 415-585 | 515-690 |
| Yield zog (ksi) | 30 | 45 |
| Yield zog (MPa) | 205 | 310 |
| Elongation hauv 50mm (%) | 18 | 18 |
| Txo thaj tsam hauv% | 45 | 45 |
Siab -Kev Ua Haujlwm Kub ntawm ASME SA387 Gr.5 Alloy Steel Phaj
1. Ntev ntev heev -Lub Sij Hawm Creep Resistance
Qhov sib ntxiv ntawm chromium (Cr) thiab molybdenum (Mo) txhim kho carbide stability thiab ntxiv dag zog rau cov hlau matrix. Qhov no ua rau SA387 Gr.5 los txhawb kev ua haujlwm ntev - lub sijhawm ua haujlwm ntawm qhov kub txog li 600℃(1112℃F) thaum txo qis qis deformation.
Cov txiaj ntsig tseem ceeb:
Exceptional creep-rupture zog thaum lub sij hawm ntev - kev pab cuam.
Superior dimensional stability nyob rau hauv sustained loads.
Ntxiv kev pab cuam lub neej rau cov hlab ntsha siab thiab reactors.
2. Zoo heev -Tub kub Oxidation Resistance
Muaj 4.00% mus rau 6.00% chromium, SA387 Gr.5 ua kom tuab, tiv thaiv chromium oxide nplai. Qhov no txo qis oxidation thiab scaling nyob rau hauv qhov chaw ua hauj lwm tas mus li ntawm 500 txog 600 degree.
Cov txiaj ntsig tseem ceeb:
Zoo heev tiv thaiv oxidation thiab scaling.
Txo cov khoom degradation ntawm qhov kub thiab txias.
Txo cov nqi kho thiab tshuaj xyuas.
3. Txhim khu kev qha thermal Fatigue Resistance
Cov cuab yeej siv siab feem ntau ua rau lub voj voog pib-ups, shutdowns, thiab kub hloov pauv. Ua raws li kev ua haujlwm zoo lossis normalizing thiab tempering (N&T), peb SA387 Gr.5 txhim kho microstructure refined uas zoo tiv thaiv thermal qaug zog tawg thiab tswj cov txheej txheem kev ncaj ncees thaum lub sij hawm kev pabcuam cyclic.
Cov txiaj ntsig tseem ceeb:
Zoo heev tiv thaiv cyclic thermal stress.
Txhim khu kev tawg tiv thaiv thaum kub hloov pauv.
Kev ua haujlwm ruaj khov thaum lub sijhawm ua haujlwm ntev - nyob rau hauv refineries thiab fais fab nroj tsuag.
Nrhiav daim phiaj rau reactors, hloov kho lossis raug rho tawm cua sov? Peb pab pawg neeg tsim khoom tuaj yeem pom zoo rau qib SA387 zoo tshaj plaws raws li koj qhov kev khiav hauj lwm kub thiab kev tsim siab.
Kev kho cua sov ntawm ASME SA387 Gr. 5 Alloy Steel Phaj
Kev kho cua sov kom zoo yog qhov tseem ceeb rau kev ua tiav qhov siab siab -kub txhua yam uas yuav tsum tau muaj rau kev siv lub nkoj siab. Peb ASME SA387 Gr. 5 steel daim hlau muaj nyob rau hauv ntau yam cua sov- kho mob kom ua tau raws li kev tsim qauv thiab kev pabcuam.
chav kawm 1
Chav Kawm 1 – Normalized (N)
Peb Cov Phaj 1 feem ntau yog muab rau hauv cov xwm txheej zoo li qub. Cov txheej txheem normalizing refines cov qauv nplej, txhim kho microstructural uniformity, thiab muab ruaj khov zog thiab ductility rau dav dav - kub siab siab daim ntaub ntawv.
Cov yam ntxwv tseem ceeb:
Refined grain qauv.
Uniform mechanical zog.
Zoo weldability thiab formability.
chav kawm 2
Chav Kawm 2 – Normalized thiab Tempered (NT)
Peb Cov Phaj 2 tau ua kom zoo li qub raws li tempering los tsim cov tempered bainite los yog tempered martensite microstructure, ua kom muaj zog thiab ntev - lub sij hawm creep resistance. Cov xwm txheej no feem ntau tau teev tseg rau cov hlab ntsha uas xav tau ntau dua ua haujlwm nyob rau hauv qhov kub thiab txias thiab cyclic thermal loads.
Cov yam ntxwv tseem ceeb:
Txhim kho toughness thiab ductility.
Txhim kho creep tsis kam rau kev ua haujlwm ntev -.
Superior tsis kam rau thermal qaug zog thiab kev ntxhov siab tawg.
Kev txiav txim siab vuam
- Preheat: Rau cov phaj tuab dua ~ 12 hli, preheating ntawm 150-200℃yog pom zoo kom tiv thaiv hydrogen-induced cracking (HIC).
- Tshaj tawm -Weld Heat Treatment (PWHT):PWHT ntawm 620-680℃feem ntau yuav tsum tau rau cov welded sib dhos, tshwj xeeb tshaj yog rau tuab - cov hlab ntsha. Qhov no txo cov kev ntxhov siab uas seem thiab ua rau cov cua sov ua kom sov- thaj chaw cuam tshuam (HAZ).
- Simulated PWHT (SPWHT):Rau cov ntawv thov tseem ceeb, GNEE Steel tuaj yeem muab cov phiaj xwm uas tau simulated PWHT, tso cai rau cov cuab yeej cuab tam sim ntawm cov khoom hauv nws qhov kev tshaj tawm - kev pabcuam.
Daim ntawv thov ntawm ASME SA387 Gr. 5 Alloy Steel Phaj
Roj Refining & Petrochemical
- Catalytic cracking units - reactor thiab regenerator shells
- Hydroprocessing reactors - hydrodesulfurization (HDS), hydrocracking hlab ntsha
- Sulfur rov qab units - Claus reactor nkoj thiab tail gas kho
- High -kub kub exchangers thiab separators tuav qaub kev pab cuam kua
- Distillation kem internals thiab pej thuam shells nyob rau hauv crude units
Lub zog tiam
- Boiler nruas thiab chav sib cais
- Heat Recovery Steam Generators (HRSG) Cheebtsam
- Superheater thiab reheater headers
- Siab -cov kav dej thiab cov kav dej
Kev ua tshuaj lom neeg
- Reactors tuav hydrogen- cov kwj nplua nuj ntawm qhov kub siab
- High -kub cia tank rau corrosive media
- LPG cia spheres thiab cov hlab ntsha siab
GNEE Steel - Koj Lub Hwj Chim Hnyav Plate
Nrog dhau18 xyoontawm kev tshwj xeeb hauv steel phaj mov, GNEE Steel tau tsim nws tus kheej ua qhov chaw cia siab rau chromium-molybdenum alloy daim hlau, suav nrog tag nrho cov qib ASME SA387. Peb lub siab lub nkoj phaj cov khoom lag luam thiab cov peev txheej ua tau tsim los ua haujlwm rau cov neeg tsim khoom, EPC cov neeg cog lus, thiab kawg - cov neeg siv thoob ntiaj teb lub zog thiab petrochemical sectors.
Xyoo ntawm kev paub steel
Teb Chaws Ua Haujlwm
Cov koom tes thoob ntiaj teb
Pab neeg tshaj lij
Peb muab dab tsi rau SA387 Gr.5?
- Tag nrho Dimensional Range: Thickness 6 mm – 300 mm|Dav txog li 4,000 mm|Ntev mus txog 18,000 mm
- Ob Chav Kawm Muaj: Chav Kawm 1 (N) thiab Chav Kawm 2 (N + T) kom tau raws li koj cov cai tsim
- Mill Test Certificate: EN 10204 Hom 3.1 / 3.2 MTC muab nrog rau txhua qhov kev txiav txim, suav nrog tag nrho cov ntsuas kub thiab cov ntaub ntawv ntsuas kev ntsuas
- Thib peb- Kev Tshawb Fawb Txog Kev Tshawb Fawb: Peb txhawb nqa ntawm - qhov chaw tshuaj xyuas los ntawm BV, SGS, TÜV, thiab lwm lub koom haum lees paub
- Simulated PWHT Kev Pabcuam: Cov phaj tuaj yeem muab tau nrog simulated ncej-weld kho cua sov rau cov ntawv thov tseem ceeb, nrog cov khoom siv kho tshuab kuaj hauv post-PWHT mob
- Kev txiav txim yooj yim: MOQ los ntawm 1 daim; hauv -cov khoom xa tuaj tam sim ntawd, cov xaj xaj ntau lawm feem ntau ua tiav hauv 10-40 hnub
- Kev sib sib zog nqus: Txiav rau qhov loj me, beveling, kev kho deg (steev blasting, painting) muaj rau cov neeg siv khoom
Quality Assurance
Txhua lub phaj peb muab cov txheej txheem tswj xyuas kom zoo: kev txheeb xyuas qhov ntsuas kub, ntsuas cov cuab yeej cuab yeej (tensile, yield, elongation, hardness), kuaj ultrasonic ib ASTM A435 / A578, thiab cov ntaub ntawv tag nrho nrog cov cua sov traceability. Peb pawg neeg yuav khoom thiab QC txheeb xyuas kev ua raws li ASME SA-387 / SA-387M cov cai ua ntej txhua yam khoom raug tso tawm rau kev xa khoom.
FAQ
Q: Yuav ua li cas SA387 Gr.5 piv rau Gr.11 (1.25Cr-0.5Mo) hais txog corrosion kuj thiab lub zog?
A: SA387 Gr. 5 (5.00% Cr-0.50%Mo) ua tau zoo tshaj Gr. 11 (1.25% Cr-}0.50% Mo) nyob rau hauv corrosion kuj thiab siab kub zog. Nws cov ntsiab lus chromium siab dua muab cov oxidation zoo dua thiab ntsuas qhov ntsuas kub ntawm qhov kub siab dua, thaum ob qib siv molybdenum los tiv thaiv qhov kub thiab txias.
Q: Qhov txawv ntawm Gr.5 thiab Gr.22 (2.25Cr-1Mo) yog dab tsi?
A: Gr.5 (5Cr-0.5Mo) thiab Gr.22 (2.25Cr-1Mo) yog ob qho tib si siab -kev ua tau zoo, qis-alloy chromium-molybdenum steels. Lawv lub ntsiab sib txawv yog nyob rau hauv lawv cov tshuaj muaj pes tsawg leeg, uas dictates lawv tej qhov kub thiab txias txwv, corrosion kuj, thiab haum rau txawv industrial daim ntaub ntawv.
Q: Gr.5 piv rau Gr.9 (9Cr-1Mo) li cas?
A: ASTM Qib 5 (5Cr-}0.5Mo) thiab Qib 9 (9Cr-1Mo) yog ob qho tib si siab -kub, corrosion-resistant ferritic alloy (chrome-moly) steels. Qib 9 muaj kwv yees li ob npaug ntawm cov chromium thiab ob npaug ntawm molybdenum ntawm Qib 5, uas ua rau nws zoo tshaj qhov kub thiab txias zog, nkag siab, thiab tiv thaiv corrosion.
Q: Dab tsi txawv Gr.5 ntawm Gr.12 (1Cr-0.5Mo)?
A: Gr.5 thiab Gr.12 (1Cr-0.5Mo) yog ob qho tib si siab-kub, chromium-molybdenum alloy steels, tab sis Gr.5 muaj chromium ntau dua thiab tuaj yeem tiv taus ntau dua kev ua haujlwm kub thiab corrosive ib puag ncig.
Q: Qhov txawv ntawm SA387 Gr.5, Gr.9 thiab Gr.11 yog dab tsi?
A: ASME SA387 Qib 5, 9, thiab 11 yog chromium-molybdenum (Chrome-Moly) alloy steel daim hlau siv nyob rau hauv siab kub thiab siab hlab ntsha. Thawj qhov sib txawv yog nyob rau hauv lawv cov chromium thiab molybdenum cov ntsiab lus, uas dictates lawv corrosion kuj, kub kam rau ua, thiab kev siv tshwj xeeb.
