1. ASTM A671 CJB115 Class 70 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 70 yog atxiav- ntug hluav taws xob- fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra- siab heev thiab tshwj xeeb cov ntawv thov kev lag luam(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 70" qhia txog aYam tsawg kawg nkaus tawm lub zog ntawm 70 ksi (483 MPa), ua rau nws yog ib qho ntawm - qib siab tshaj plaws hauv CJB115 series rau lub hom phiaj- cov txheej txheem tseem ceeb.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 70 ksi (483 MPa)
Tensile zog:210-230 ksi (1,448-1,586 MPa)
Impact Test:Yuav tsum Charpy V-notchntawm kev khiav hauj lwm kub
Tshuaj:
Cov pa roj carbon (C):0.48–0.58%(zoo rau ultra-lub zog siab)
Manganese (Mn):2.20–2.50%(Txhim kho hardenability thiab toughness)
P/S: Tsawg dua lossis sib npaug li 0.002%(kev lag luam-ua purity rau weld kev ncaj ncees)
3. Cov ntawv thov zoo li cas?
Teb:
Ultra- roj & roj ntau lawm tshuab(75, 000+ psi)
Nuclear fusion reactor thawj tswj
Space launch tsheb roj manifolds
Tub rog -qib hyperbaric xeem cov chaw
4. Nws Li Cas Piv rau Chav Kawm 65 thiab Chav Kawm 75?
Teb:
| Chav kawm | Yield zog | Performance Ntug |
|---|---|---|
| Chav Kawm 65 | 65 ksi (448 MPa) | Siab -siab tshwj xeeb |
| Chav Kawm 70 | 70 ksi (483 MPa) | Qhov kawg siab thiab qaug zog kuj |
| Chav Kawm 75 | 75 ksi (517 MPa) | Kev cai ultra-siab-kev ua tau zoo |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:750℃F min. + PWHT(1500-1600 ° F)
Kev tshuaj xyuas:100% phased-array UT + radiography + hardness mapping
Kev sim:
Hydrostatic:10x tsim siab
Fracture mechanics kuaj(CTOD/J-integral)
Ntawv pov thawj: ASME Section III Class 1 + NQA-1 nuclear compliance
