1. ASTM A671 CJB115 Class 42 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 42 yog ahigh-kawg hluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabengineered rauheev-siab thiab siab-stress industrial systems(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 42" qhia txog aYam tsawg kawg nkaus lub zog ntawm 42 ksi (290 MPa), muab nws tso rau ntawm qib hwm ntawm CJB115 series rau cov ntawv thov tseem ceeb.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 42 ksi (290 MPa)
Tensile zog:120-140 ksi (827-965 MPa)
Impact Test:Yuav tsum Charpy V-notchntawm qhov ntsuas kub tsim
Tshuaj:
Cov pa roj carbon (C):0.32–0.38%(zoo rau lub zog-weldability tshuav)
Manganese (Mn):1.45–1.75%(hloov hardenability)
P/S: Tsawg dua lossis sib npaug li 0.015%(ultra-tsawg impurities)
3. Cov ntawv thov zoo li cas?
Teb:
Subsea roj & roj manifolds(20, 000+ psi)
Nuclear reactor coolant voj backup systems
Aerospace hydraulic xeem rigs
Heavy industrial forging presses
4. Nws Puas Piv rau Chav Kawm 41 thiab Chav Kawm 45?
Teb:
| Chav kawm | Yield zog | Qhov tseem ceeb Advantage |
|---|---|---|
| Chav Kawm 41 | 41 ksi (283 MPa) | Siab cyclic qaug zog kuj |
| Chav Kawm 42 | 42 ksi (290 MPa) | Superior siab tswj |
| Chav Kawm 45 | 45 ksi (310 MPa) | Tshwj xeeb ultra-siab- siab |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:500℃F min. + PWHT(1250-1350 ° F)
Kev tshuaj xyuas:100% phased-array UT + hardness traverse xeem
Kev sim:
Hydrostatic:4.5x tsim siab
Fracture toughness kuaj(CTOD los yog J-integral)
Ntawv pov thawj: ASME Tshooj III Chav Kawm 1 nuclear kev ua raws cai
