1. ASTM A671 CJB115 Class 52 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 52 yog apremium fais-fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra- tseem ceeb heev - siab thiab siab - kev siv kev ntxhov siab(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 52" qhia txog aYam tsawg kawg nkaus lub zog ntawm 52 ksi (359 MPa), ua rau nws zoo tagnrho rau huab kev lag luam tshuab xav tau kev ua haujlwm tsis sib xws.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 52 ksi (359 MPa)
Tensile zog:150-170 ksi (1,034-1,172 MPa)
Impact Test:Yuav tsum Charpy V-notchntawm kev khiav hauj lwm kub
Tshuaj:
Cov pa roj carbon (C):0.37–0.44%(zoo rau ultra-lub zog siab)
Manganese (Mn):1.70–2.00%(Txhim kho toughness thiab hardenability)
P/S: Tsawg dua lossis sib npaug li 0.007%(ultra{0}}tsawg impurities rau superior weldability)
3. Cov ntawv thov zoo li cas?
Teb:
Ultra- roj & roj ntau lawm tshuab(40, 000+ psi)
Nuclear reactor siab hlab ntsha internals
Space launch platform hydraulic systems
Kev tiv thaiv- qib siab- cov chav ntsuas siab
4. Nws Puas Piv rau Chav Kawm 51 thiab Chav Kawm 55?
Teb:
| Chav kawm | Yield zog | Qhov tseem ceeb Advantage |
|---|---|---|
| Chav Kawm 51 | 51 ksi (352 MPa) | Heev - tus qauv siab |
| Chav Kawm 52 | 52 ksi (359 MPa) | Superior qaug zog thiab tawg tsis kam |
| Chav Kawm 55 | 55 ksi (379 MPa) | Kev cai ultra-siab-kev ua tau zoo |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:600℃F min. + PWHT(1350-1450 ° F)
Kev tshuaj xyuas:100% phased-array UT + radiography + hardness traverse
Kev sim:
Hydrostatic:6.5x tsim siab
Fracture mechanics kuaj(CTOD/J-integral)
Ntawv pov thawj: ASME Section III Class 1 + NQA-1 nuclear compliance
