Dab tsi yog cov khoom siv kho tshuab ntawm SA387 Qib 22 Chav Kawm 2?
SA387 Qib 22 Chav Kawm 2yog qib tshwj xeeb ntawm chrome-molybdenum (Cr-Mo) alloy steel phaj tsim los rau siab - kub thiab siab - kev pabcuam siab. Nws feem ntau yog siv rau hauv kev tsim cov hlab ntsha siab, boilers, thiab reactors hauv kev lag luam xws li roj refineries, petrochemical nroj tsuag, thiab lub zog tsim.
Cov khoom siv kho tshuab ntawm SA387 Qib 22 Chav Kawm 2 yog txhais los ntawm ASTM / ASME SA-387 tus qauv thiab tau lees paub los ntawm cov khoom siv Normalized thiab Tempered (+ NT) kev kho cua sov.
Yam tsawg kawg nkaus uas yuav tsum tau muaj (Ib ASTM / ASME SA-387)
| Khoom | Kev xav tau |
|---|---|
| Tensile zog | 515 - 690 MPa (75 - 100 ksi) |
| Yield zog (0.2% Offset) | Ntau dua lossis sib npaug rau 310 MPa (Ntau dua lossis sib npaug rau 45 ksi) |
| Elongation (hauv 50mm / 2 ") | Ntau dua lossis sib npaug li 18% (rau daim hlau Tsawg dua lossis sib npaug li 25mm / 1 "tuab) Ntau dua lossis sib npaug li 20% (rau daim hlau> 25mm / 1 "tuab) |
| Kev txo qis ntawm cheeb tsam | Ntau dua lossis sib npaug li 45% (cov qauv ntsuas kev sib hloov) |
| Hardness (Brinell) | Tsawg dua lossis sib npaug rau 220 HBW (feem ntau ~ 163-220 HBW) |
| Impact Toughness (Charpy V-Notch) | Notch-Toughness Requirement: Yuav tsum ua kom tau raws li qhov yuav tsum tau muaj S8 yog tias tau teev tseg hauv daim ntawv xaj yuav khoom (xws li, 54J / 40 ft-lbf min. avg. ntawm qhov ntsuas kub). |
Critical High -Tsub Properties
Txawm hais tias tsis yog ib qho kev lees paub tus nqi, SA387 Gr 22 Cl 2 yog xaiv rau nws lub zog creep thiab siab kub yield zog. Cov qauv tsim muaj nyob hauv cov lej xws li ASME BPVC Tshooj II, Ntu D (piv txwv li, cov lus rau qhov siab tshaj plaws kev ntxhov siab, "S" qhov tseem ceeb).
Qhov kub zoo tshaj plaws uas siv tau: Mus txog ~ 540℃(~ 1000℃F) rau kev ua haujlwm ntev -.
Qhov Zoo Tshaj Plaws Tseem Ceeb: Khaws ib feem tseem ceeb ntawm nws chav - qhov kub thiab txias ntawm qhov kub siab, zoo dua li carbon hlau.
Cov Lus Cim Tseem Ceeb & Cov Txheej Txheem cuam tshuam
Kev kho cua sov yog qhov yuav tsum tau ua: Qhov "Class 2" tsim los ua kom muaj qhov zoo li qub & Tempered, uas ua tiav qhov kev sib npaug tshwj xeeb ntawm lub zog thiab ductility.
Thickness Effect: Mechanical zog, tshwj xeeb tshaj yog tawm lub zog thiab elongation, tuaj yeem sib txawv me ntsis nrog phaj thickness. Thicker seem yuav pom muaj zog qis dua.
Test Direction: Cov khoom yog feem ntau qhia nyob rau hauv lub transverse kev taw qhia (perpendicular mus dov). Longitudinal qhov tseem ceeb tuaj yeem siab dua me ntsis.
Qhov tseeb vs. Yam tsawg kawg nkaus: Mill Test Certificate (MTRs) qhia txog qhov ntsuas qhov tseeb ntawm cov cua sov tshwj xeeb, uas yuav tsum tau ua kom tau raws li qhov tsawg kawg nkaus saum toj no. Lub zog tawm los tiag tiag feem ntau tshaj 310 MPa ho.
Hauv cov ntsiab lus
SA387 Qib 22 Chav Kawm 2 muab qhov tsawg kawg nkaus lub zog ntawm 310 MPa (45 ksi) thiab tensile lub zog ntawm 515-690 MPa (75-100 ksi), ua ke nrog zoo ductility thiab tswj hardness uas ua kom cov weldability thiab toughness rau high-temperature pressure nkoj siv.
1. SA387 Qib 22 Chav Kawm 2 yog dab tsi?
SA387 Qib 22 Chav Kawm 2 yog ib qho kev qhia tshwj xeeb rau chromium-molybdenum alloy steel daim hlau feem ntau siv hauv cov hlab ntsha siab thiab lwm yam siab - cov ntawv thov kev pabcuam kub.
2. Cov tshuaj muaj pes tsawg leeg ntawm SA387 Qib 22 Chav Kawm 2 yog dab tsi?
Nws muaj pes tsawg leeg muaj xws li chromium (2.00-2.50%), molybdenum (0.90-1.10%), nrog carbon, manganese, phosphorus, sulfur, thiab silicon ua cov seem.
3. Dab tsi yog cov khoom siv kho tshuab ntawm SA387 Gr 22 Cl 2?
Cov khoom tseem ceeb muaj xws li lub zog tensile yam tsawg kawg nkaus ntawm 515 MPa (75 ksi) thiab qhov tsawg kawg nkaus yield zog ntawm 310 MPa (45 ksi) rau cov phaj siab tshaj 65 hli tuab.
4. Qhov txawv ntawm SA387 Qib 22 Chav Kawm 1 thiab Chav Kawm 2 yog dab tsi?
Thawj qhov sib txawv yog kev kho cua sov; Cov khoom siv hauv chav kawm 2 yuav tsum tau muab nkag rau hauv cov xwm txheej zoo li qub thiab kub ntxhov, thaum Chav Kawm 1 tsis muaj qhov yuav tsum tau ua, cuam tshuam rau nws lub zog thiab microstructure.
5. Qhov kev pabcuam siab tshaj plaws rau SA387 Qib 22 yog dab tsi?
SA387 Qib 22 feem ntau yog siv rau kev pabcuam kub txog li 550℃(1022℃F), tab sis cov kev txwv tshwj xeeb yog nyob ntawm qhov siab thiab kev ntxhov siab.
6. Puas yog SA387 Qib 22 Chav Kawm 2 sib npaug rau lwm qib khoom siv?
Yog lawm, nws yog dav sib npaug rau ASTM A387 Gr22 Cl2, ASME SA387 Gr22 Cl2, thiab cov khoom siv wrought qib UNS K21590.
7. Yuav ua li cas rau vuam SA387 Qib 22 Chav Kawm 2 hlau?
Vuam feem ntau yuav tsum tau ua ntej- cua sov thiab tom qab-weld heat treatment (PWHT). Common filler metals muaj xws li AWS E9015-B3 rau SMAW lossis cov qhab nia sib raug rau lwm cov txheej txheem kom phim lub hauv paus hlau cov khoom.
8. Kev kho cua sov rau SA387 Gr22 Cl2 yog dab tsi?
SA387 Qib 22 Chav Kawm 2 daim hlau tau muab tso rau hauv qhov qub (ntawm 1650-1750℃F) thiab tempered (ntawm 1250-1350℃F) mob kom ua tiav cov khoom siv kho tshuab.
9. Qhov twg yog SA387 Qib 22 Chav Kawm 2 nquag siv?
Nws yog dav siv nyob rau hauv fabrication ntawm siab hlab ntsha, boilers, thiab reactors rau lub hwj chim tiam, petrochemical, thiab roj & roj industries, tshwj xeeb tshaj yog rau cov khoom raug kub thiab siab.
10. Dab tsi yog qhov yuav tsum muaj hardness rau SA387 Qib 22 Chav Kawm 2?
Txawm hais tias ASTM / ASME specification tsis txwv ib qho nyuaj, nws feem ntau tswj tau thaum kho cua sov. Ib qho kev xav tau hauv kev pabcuam yog kom muaj qhov siab tshaj plaws, feem ntau 225 Brinell (HBW) lossis qis dua, txhawm rau tiv thaiv cov teeb meem xws li hydrogen-induced cracking.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau cov qauv tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
