1. ASTM A671 CJB115 Class 73 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 73 yog apremium fais-fusion-welded (EFW) carbon steel yeeb nkabengineered rauultra- siab heev thiab kev siv tseem ceeb hauv kev lag luam(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 73" qhia txog aYam tsawg kawg nkaus lub zog ntawm 73 ksi (503 MPa), ua rau nws yog ib qho ntawm - qib kev ua tau zoo tshaj plaws hauv CJB115 series rau lub hom phiaj- cov tshuab tseem ceeb.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 73 ksi (503 MPa)
Tensile zog:225-245 ksi (1,551-1,689 MPa)
Impact Test:Yuav tsum Charpy V-notchntawm kev khiav hauj lwm kub
Tshuaj:
Cov pa roj carbon (C):0.53–0.63%(zoo rau ultra-lub zog siab)
Manganese (Mn):2.35–2.65%(Txhim kho toughness thiab hardenability)
P/S: Tsawg dua lossis sib npaug li 0.0015%(ultra-tsawg impurities rau weld kev ncaj ncees)
3. Cov ntawv thov zoo li cas?
Teb:
Ultra- roj & roj ntau lawm(90, 000+ psi)
Nuclear fusion reactor thawj loops
Space launch tsheb roj systems
Tub rog hyperbaric xeem chaw
4. Nws Li Cas Piv rau Chav Kawm 72 thiab Chav Kawm 75?
Teb:
| Chav kawm | Yield zog | Performance Ntug |
|---|---|---|
| Chav Kawm 72 | 72 ksi (496 MPa) | Heev - tus qauv siab |
| Chav Kawm 73 | 73 ksi (503 MPa) | Txhim khu kev qaug zog thiab tawg tsis kam |
| Chav Kawm 75 | 75 ksi (517 MPa) | Kev cai ultra-siab-kev ua tau zoo |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:825℃F min. + PWHT(1575-1675℃F)
Kev tshuaj xyuas:100% phased-array UT + radiography + hardness mapping
Kev sim:
Hydrostatic:11.5x tsim siab
Fracture mechanics kuaj(CTOD/J-integral)
Ntawv pov thawj: ASME Section III Class 1 + NQA-1 nuclear compliance
