1. ASTM A671 CJF115 Chav Kawm 61 yog dab tsi?
A siab -kev ua tau zoo hluav taws xob- fusion-welded yeeb nkabrauhuab cua cryogenic thiab ultra-siab- kev pabcuam siab(hauv qab-75 ° F / -60 ° C).
CJF115: Carbon steel nrog2.25% npib tsib xeerau superior qis-kub toughness.
Chav Kawm 61: Hydrostatic xeem siab ntawm61,000 psi (421 MPa)- qib siab tshaj hauv ASTM A671 tus qauv.
2. Cov ntawv thov tseem ceeb?
Tsim los rau qhov chaw xav tau tshaj plaws:
Ultra-siab-siab LNG export terminals
Sib sib zog nqus- hiav txwv cryogenic pipelines(subsea manifolds, risers)
Nuclear lossis aerospace cryogenic systems
High -siab hydrogen infrastructure
Arctic drilling platforms nrog kev xav tau siab heev
3. Kev tsim khoom & kev xeem yuav tsum tau ua?
Ob -welded seamsnrog 100% RT / UT (radiographic + ultrasonic kuaj).
Charpy V-kev ntsuas ntsuasntawm-75 ° F / -60 ° C(yam tsawg kawg30 ft -lbavg. zog).
quenched & tempered kev kho cua sovrau qhov zoo tshaj plaws lub zog - toughness sib npaug.
Kev tswj nruj hardness(tsawg dua los yog sib npaug rau 190 HBW) nrog yuav tsum tau uaPWHT(Post-Kev kho cua sov).
4. Mechanical Properties?
Tensile zogNtau dua lossis sib npaug rau 80 ksi (550 MPa)
Yield zogNtau dua lossis sib npaug rau 50 ksi (345 MPa)
Elongation: Ntau dua los yog sib npaug li 18% (kom paub meej tias ductility nyob rau hauv qhov hnyav hnyav).
Impact toughness: Certified rau-60 degreenrog txhim kho lub zog nqus.
5. Chav kawm 61 zoo dua li chav kawm 60 li cas?
Muaj peev xwm siab dua(61k vs . 60k psi).
Tougher kev xav tau(30 ft-lb vs. 25 ft-lb).
Kev nruj dua weld kev kuaj xyuas(Ntxiv UT dhau RT).
Txo qhov siab tshaj plaws hardness(190 HBW vs . 200 HBW) rau kev tiv thaiv tawg.
