A333 Gr.6 steel yeeb nkab yog qhov qis -kub seamless steel yeeb nkab raws li tus qauv ASTM A333, feem ntau yog siv nyob rau hauv qhov tsis tshua muaj siab - qhov kub thiab txias ib puag ncig ntawm -45℃rau -101℃. Nws cov khoom tseem ceeb yog carbon steel los yog cov hlau tsis tshua muaj hlau, nrog cov ntsiab lus xws li npib tsib xee (Ni) ntxiv los txhim kho qhov kub thiab txias. ASTM A333 tus qauv qhia meej meej nws cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab cov kev ntsuas cuam tshuam los xyuas kom meej lub zog siab thiab tsis kam ua kom tawg ntawm qhov kub thiab txias.
Cov ntsiab lus tseem ceeb (saib rau ASTM A333-18 tus qauv):
- Tensile zog: Ntau dua lossis sib npaug li 415 MPa
- Lub zog tawm los: Ntau dua lossis sib npaug li 240 MPa
- Elongation: Ntau dua lossis sib npaug li 30% (gauge ntev 50 mm)
- Kev cuam tshuam lub zog yuav tsum muaj: Yam tsawg kawg 18 J ntawm -45℃(Charpy V-notch test).
- Tshuaj muaj pes tsawg leeg: carbon cov ntsiab lus Tsawg dua los yog sib npaug rau 0.30%, manganese cov ntsiab lus 0.29%-1.06%, thiab nruj me ntsis tswj impurities xws li sulfur (tsawg dua los yog sib npaug rau 0.025%) thiab phosphorus (tsawg dua los yog sib npaug rau 0.025%) kom ntseeg tau tias qhov kub thiab txias.
- Cov txheej txheem tsim khoom: Kub dov lossis txias txheej txheem seamless yog siv, thiab kev kho cua sov kom zoo yuav tsum tau ua kom zoo dua cov nplej thiab txhim kho qhov kub thiab txias. Qee lub hom phiaj tshwj xeeb steel kav kuj yuav tsum tau kuaj xyuas ultrasonic (UT) lossis eddy tam sim no kuaj (ET) kom ntseeg tau tias tsis muaj qhov tsis xws luag.
Cov cheeb tsam thov
Vim nws txoj kev ua haujlwm zoo heev cryogenic, A333Gr.6 seamless yeeb nkab feem ntau siv rau hauv cov ntawv hauv qab no:
- Liquefied Natural Gas (LNG) Cov Khoom Siv: Hauv LNG cia thiab kev thauj mus los, cov kav dej yuav tsum tau tiv taus qhov kub thiab txias, thiab cov khoom no ua tau raws li cov cai no.
- Cov Cuab Yeej Hluav Taws Xob: Cov kav dej hauv cov tub yees loj hauv cov tub yees, tshwj xeeb tshaj yog nyob rau hauv cov chaw khaws cia cryogenic lossis cov tub yees ntau lawm.
- Kev Lag Luam Tshuaj: Cov khoom siv no kuj tseem siv rau hauv qee cov tshuaj tiv thaiv cryogenic lossis cov kav xa dej xa mus.