A672 cov yeeb nkab steel yog ib qho nruab nrab kub thiab siab-siab hluav taws xob fusion welded steel yeeb nkab welded steel yeeb nkab uas ua raws li cov asme Sa672 tus qauv. Nws yog tsuas yog siv nyob rau hauv kev lag luam hluav taws xob uas tiv thaiv siab thiab kub, xws li petrochemical, chaw nres tsheb fais fab thiab lwm yam xwm txheej.
Dab tsi yog cov tshuaj lom neeg muaj pes tsawg leeg ntawm A672 Yeeb Nkab
| Tsev tos khoom | Cov ntsiab lus ntau (%) | Kev tswj cov ntsiab lus |
|---|---|---|
| C | Tsawg dua los yog sib npaug rau 0.20 ~ 0.31 | The upper limit is relaxed as the thickness increases (e.g. >100 hli yuav raug txo kom 0.27%) |
| Mn | 0.85~1.60 | Thaum lub thickness yog tsawg dua los yog sib npaug rau 12.5mm, qhov kev txwv qis dua tuaj yeem txo mus rau 0.60% |
| Si | 0.15~0.55 | Txhim kho lub zog thiab deoxidation nyhuv |
| P/S | Tsawg dua los yog sib npaug rau 0.025 ~ 0.035 | Nruj me ntsis txwv tsis pub cov ntsiab lus txawv txav los xyuas kom muaj tawv |
| Lw alloys | Cr / ni / cu tsawg dua lossis sib npaug | Txhim kho corrosion tsis kam (yeem) |
Dab tsi yog cov khoom siv tshuab ntawm A672 Welded yeeb nkab?
| phiaj qhia ntawv | Kwv yees li cas | Qhov tseem ceeb |
|---|---|---|
| Paib lub zog | Ntau dua los yog sib npaug rau 380 ~ 415 MPa | Nyob ntawm qib |
| Lub zog tensile | 485 ~ 660 MPa | B70 / C70 siab dua |
| Elongation | Ntau dua los yog sib luag rau 18% ~ 22% (ntsuas cua ntev ntev tau) | Nyob ntawm qib |
| Kev Cuam Tshuam | -46 Degree cuam tshuam lub zog loj dua los yog sib npaug rau 27J (CL22) | Cryogenic Service Qhov Ntsuas |
| Kev nyuaj | Tsawg dua los yog sib npaug rau 197 hb | Tiv thaiv brittle tawg |
Cov yam ntxwv ua tau zoo
- Siab zog thiab siab tiv
Lub zog tensile ntau txog 660Mpa, haum rau nruab nrab kub, xws li fais fab raj hluav taws xob (xws li hluav taws xob nroj tsuag, cov tshuaj esterors) tsawg dua lossis sib npaug ntawm 480 degree.
- Cov Khoom Tsawg Zoo Tshaj-Kub
Cl Suffix faib (xws li CL22, CL32) qhia meej meej qhov tsawg-kub yoog raws kev hloov: CL22: -30℃rau -20℃ib puag ncig
CL32: -60 Qib rau -45℃ib puag ncig
Passed -46 Degree cuam tshuam xeem (V-Motch Charpy cuam tshuam lub zog loj dua los yog sib luag rau 27J).
- Vuam thiab ua cov txiaj ntsig zoo
Cov qauv siv roj teeb txo tau txo cov kab nrib pleb tsawg thiab yog tshaj cov txheej txheem xws li submerged arc vuam / siab ntau zaus vuam;
Elongation ntau dua los yog sib npaug rau 18%, txhawb nqa txias dabtsi yog.
- Corrosion tiv thaiv
Ntxiv cov kab nqis ntawm CR thiab CU cov ntsiab lus los txhim kho kev tiv thaiv ib puag ncig corrosion tsis kam, haum rau sulphur-muaj cov roj thiab roj.
