ASTM A671 CJB115 Chav Kawm 72 Hlau Yeeb Nkab

1. ASTM A671 CJB115 Class 72 Steel Pipe yog dab tsi?

Teb:
ASTM A671 CJB115 Chav Kawm 72 yog ib qhoultra-siab-kev ua tau zoo hluav taws xob- fusion-welded (EFW) carbon steel yeeb nkabtsim rau- siab heev thiab tseem ceeb rau kev lag luam(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 72" qhia txog aYam tsawg kawg nkaus tawm lub zog ntawm 72 ksi (496 MPa), positioning nws nyob rau hauv pem hauv ntej ntawm CJB115 series rau xav tau systems.

2. Cov khoom tseem ceeb?

Teb:

Mechanical:

Yield zog:Ntau dua lossis sib npaug rau 72 ksi (496 MPa)

Tensile zog:220-240 ksi (1,517-1,655 MPa)

Impact Test:Yuav tsum Charpy V-notchntawm qhov ntsuas kub tsim

Tshuaj:

Cov pa roj carbon (C):0.52–0.62%(zoo rau ultra-lub zog siab)

Manganese (Mn):2.30–2.60%(Txhim kho toughness thiab hardenability)

P/S: Tsawg dua lossis sib npaug li 0.0015%(ultra{0}}tsawg impurities rau superior weldability)

3. Cov ntawv thov zoo li cas?

Teb:

Subsea roj & roj qhov taub(85, 000+ psi)

Nuclear fusion reactor ntim cov hlab ntsha

Space launch platform hydraulic systems

Tub rog hyperbaric xeem chav

4. Nws Puas Piv rau Chav Kawm 71 thiab Chav Kawm 75?

Teb:

5. Fabrication & Certification?

Teb:

Vuam:

Preheat:800℃F min. + PWHT(1550-1650 ° F)

Kev tshuaj xyuas:100% phased-array UT + radiography + hardness traverse

Kev sim:

Hydrostatic:11x tsim siab

Fracture mechanics kuaj(CTOD/J-integral)

Ntawv pov thawj: ASME Section III Class 1 + NQA-1 nuclear compliance