SA387 Qib 11 Chav Kawm 1yog ib qho chromium-molybdenum alloy steel phaj tshwj xeeb tsim los siv rau hauv welded boilers thiab cov hlab ntsha siab ua haujlwm ntawm qhov kub siab.it tseem yog cov khoom tseem ceeb hauv cov roj, roj, thiab petrochemical kev lag luam vim nws tsis kam oxidation, corrosion, thiab siab - kub creep.
Tshuaj muaj pes tsawg leeg
| C | Mn | P | S | Si | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.04 – 0.17 | 0.35 – 0.73 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.035 | 0.44 – 0.86 | 0.94 – 1.56 | 0.40 – 0.70 |
Mechanical Properties
| Qib | Thickness (hli) | Yield zog (ksi) | Tensile zog (ksi) | Elongation hauv 2 "(%) | Elongation hauv 8 "(%) |
|---|---|---|---|---|---|
| Qib 11 Chav Kawm 1 | 0.185 – 3.60 / 4.70 – 91.4 | 35 | 60 – 85 | 22 | 19 |
Dimension Range – SA387 Qib 11 Chav Kawm 1 Phaj
| Qib | Yam khoom | Thickness (hli) | Dav (mm) | Ntev (mm) |
|---|---|---|---|---|
| Qib 11 | Phaj | 0.185 – 3.60 / 4.70 – 91.4 | 1500 – 3350 | 1900 – 15000 |
Tensile Requirements
| Kev xav tau | Tus nqi |
|---|---|
| Tensile zog | 75 - 100 ksi (515 - 690 MPa) |
| Yield zog (0.2% offset) | Ntau dua lossis sib npaug rau 43 ksi (310 MPa) |
| Elongation hauv 8 nti (200 mm) | Ntau dua lossis sib npaug li 18% |
| Elongation hauv 2 nti (50 mm) | Ntau dua lossis sib npaug li 22% |
| Kev txo qis ntawm cheeb tsam | Tsis tau teev tseg |
kev ua haujlwm
1. Ua ntej-Kev Ua Haujlwm & Txiav
Kev Tshawb Fawb Cov Khoom Siv: Xyuas kom lub phaj tau muab rau hauv qhov xwm txheej zoo li qub thiab Tempered (N + T) nrog daim ntawv pov thawj Mill Test (MTC).
Preheated Cutting: Txhawm rau tiv thaiv cov npoo tawg hauv Heat Afected Zone (HAZ), daim hlau yuav tsum tau preheated rau 250℃F - 300℃F (120℃- 150} degree) ua ntej oxy- roj lossis ntshav txiav.
2. Kev sib sau (Cold vs. Hot)
Cold forming: Tso cai rau cov radii loj. Yog hais tias cov fiber ntau elongation ntau tshaj 5%, kev ntxhov siab tom ntej - yuav tsum tau kev kho cua sov los yog kev kho cua sov tag nrho ntawm ASME Tshooj VIII.
Kev Ua Kub Kub: Ua rau kub ntawm 1650℃F thiab 1925℃F (900℃- 1050℃).
Qhov Tseem Ceeb Tseem Ceeb: Yog tias cov khoom siv tau ua kom sov siab dua nws qhov qub tempering, nws yuav tsum tau ua kom tiav re-kev kho cua sov (Normalizing & Tempering) kom rov qab tau Class 1 txhua yam khoom.
3. Welding Operations (P-Number 4)
Raws li P-Tsis muaj. 4 cov ntaub ntawv, Qib 11 yuav tsum muaj kev tswj xyuas kom zoo thaum vuam:
Preheating: Yuav tsum tau preheat ntawm 300℃F - 500℃F (150℃- 260}℃) nyob ntawm thickness kom tsis txhob hydrogen -induced cracking.
Interpass Kub: Yuav tsum tau khaws cia siab tshaj qhov kub ua ntej tab sis feem ntau qis dua 600℃F (315 degree).
Filler Metals: Siv cov khoom siv hluav taws xob tsawg tsawg xws li E8018-B2 electrodes lossis ER80S-B2 xov hlau.
Dehydrogenation (DHT): Yog tias PWHT tsis tuaj yeem ua tiav tam sim tom qab vuam, tom qab ntawv -heat "ci" - tawm" ntawm 600℃F (315 degree) rau 2+ teev yog pom zoo.
4. Tshaj tawm -Weld Heat Treatment (PWHT)
Nov yog theem tseem ceeb tshaj plaws rau kev nyab xeeb ntawm lub nkoj:
Qhov kub thiab txias: Feem ntau 1200℃F txog 1300℃F (650℃- 705℃).
Tuav Sijhawm: Feem ntau 1 teev ib nti ntawm tuab (tsawg kawg 15-30 feeb).
Muaj nuj nqi: Nws txo cov kev ntxhov siab seem, txo qis qhov tawv tawv, thiab txhim kho microstructure rau siab - kev pabcuam kub.
5. Kev Tshuaj Xyuas thiab Kev Tswj Xyuas Zoo (NDT)
Kev Tshuaj Xyuas Nto: Sib Nqus Particle Test (MT) yog ua tom qab PWHT txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau qhov tawg.
Volumetric Inspection: Ultrasonic Testing (UT) los yog Radiographic Testing (RT) kom ntseeg tau tias weld internal soundness.
Mechanical Testing: Tensile tests yuav tsum lees paub qhov Class 1 range: 60–85 ksi (415–585 MPa).
Cov ntawv thov tseem ceeb
Roj & Roj:
Cov hlab ntsha siab, lub tank cia, reactors, thiab cov kav dej rau kev ua thiab khaws cia siab -kub kua thiab roj.
Petrochemical Kev Lag Luam:
Cov khoom siv hauv refineries thiab tshuaj nroj tsuag uas ua haujlwm nyob rau hauv huab cua kub heev.
Kev tsim hluav taws xob:
Cheebtsam hauv thermal fais fab nroj tsuag, boilers, thiab chav piping systems.
Thaum tshav kub kub Exchangers:
Siv qhov chaw kub thiab corrosive media.
Vim li cas thiaj siv
High -Tsev Kev Pabcuam:
Tshwj xeeb tsim los rau kev siv kub siab.
Corrosion Resistance:
Chromium cov ntsiab lus muab kev tiv thaiv zoo heev rau oxidation thiab qaub roj ib puag ncig.
Creep Resistance:
Molybdenum txhim kho nws lub peev xwm los tiv thaiv deformation nyob rau hauv kev ntxhov siab nyob rau hauv qhov kub thiab txias.
Kev lag luam
Roj & Roj
Petrochemical
Kev ua tshuaj lom neeg
Lub zog tiam
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.
Qhov kev pabcuam siab tshaj plaws ntawm SA387 Qib 11 Chav Kawm 1 yog dab tsi?
Nws qhov siab tshaj plaws kev pabcuam kub kub yog nyob ib ncig ntawm 593℃(1100℃F). Ntxiv rau qhov no, nws lub zog thiab kev ruaj ntseg ntawm cov qauv yuav txo qis.
Dab tsi yog qhov nyuaj ntawm SA387 Qib 11 Chav Kawm 1?
Tom qab kev kho cua sov, nws Brinell hardness (HB) feem ntau yog nruab nrab ntawm 137-187, ntsuas lub zog thiab machinability rau kev lag luam.
Qhov kev lag luam twg yog qib steel no feem ntau siv hauv?
Nws yog dav siv nyob rau hauv petrochemical, refinery thiab fais fab kev lag luam, tshwj xeeb tshaj yog rau cov hlab ntsha siab, boilers thiab tshav kub exchangers.
Dab tsi tom ntej -weld kev kho cua sov (PWHT) yuav tsum muaj rau cov hlau no?
Common PWHT yog tempering ntawm 620-675 degree, tuav rau ib lub sij hawm los txo cov kev ntxhov siab welding, txhim kho toughness thiab stabilize txhua yam khoom.
Yuav ua li cas tiv thaiv corrosion ntawm qib steel no hauv kev pabcuam?
Kev tshuaj xyuas tsis tu ncua, tiv thaiv- txheej txheej corrosion thiab tswj kev pabcuam ib puag ncig (tsis txhob muaj cov kua qaub / cov hauv paus) tuaj yeem tiv thaiv corrosion thiab ua rau lub neej ntev.
Lub zog tensile ntau ntawm SA387 Qib 11 Chav Kawm 1 yog dab tsi?
Nws lub zog tensile yog feem ntau ntawm 415-585 MPa. Qhov no ua kom ntseeg tau tias nws tuaj yeem tiv taus siab hauv qhov chaw ua haujlwm hnyav.
SA387 Qib 11 Chav Kawm 1 puas tuaj yeem ua tau yooj yim?
Nws muaj nruab nrab machinability. Siv cov cuab yeej siab - ceev steel los yog carbide nrog cov kev txiav kom raug ua kom cov machining du yam tsis muaj cov cuab yeej siv ntau dhau.
Qhov elongation tus nqi ntawm no steel qib yog dab tsi?
Qhov tsawg kawg nkaus elongation tus nqi yog 22% (hauv 50mm). Qhov no qhia tau hais tias zoo ductility, cia me ntsis deformation yam tsis muaj pob txha nyob rau sab nraud quab yuam.
Yuav ua li cas los txhim kho lub weldability ntawm no steel qib?
Preheating rau 150-200℃ua ntej welding thiab tom qab vuam kub kho (PWHT) tuaj yeem txo qhov kev ntxhov siab ntawm vuam thiab tiv thaiv cov kab mob khaub thuas, txhim kho weldability.