1. Q: ASTM A213 yog dab tsi?
A: ASTM A213 yog cov lus qhia tshwj xeeb rau seamless ferritic thiab austenitic alloy-steel boiler, superheater, thiab tshav kub-exchanger tubes, siv nyob rau hauv siab - siab, siab - kub ib puag ncig zoo li lub zog tsim boilers.
2. Q: Dab tsi yog "chromium-molybdenum" (Cr-Mo) alloy yeeb nkab qib thiab nws daim ntawv thov?
A: ASTM A335 P11 (1¼Cr-½Mo) yog Cr-Mo qib. Nws muaj kev txhim kho creep zog thiab oxidation tsis kam piv rau carbon steel, siv rau siab -kub piping nyob rau hauv refineries thiab fais fab nroj tsuag (xws li, chav tsev).
3. Q: Qhov tseem ceeb ntawm Qib P91 (9Cr-1Mo-V) yog dab tsi?
A: P91 yog qhov siab tshaj -lub zog chromium-molybdenum alloy nrog vanadium thiab niobium ntxiv. Nws muaj qhov tshwj xeeb creep lub zog ntawm qhov kub txog li ~ 600 ° C, tso cai rau nyias, sib dua - hnyav siab - cov kav dej hauv cov tshuab hluav taws xob supercritical.
4. Q: ASTM A312 yog dab tsi?
A: ASTM A312 npog seamless thiab welded austenitic stainless hlau kav siv rau corrosion kuj thiab siab / qis-kev pab kub (xws li, Qib TP304, TP316, TP321).
5. Q: Dab tsi yog qhov txawv ntawm 304/304L thiab 316/316L stainless hlau kav?
A: 316/316L muaj molybdenum (2-3%), uas txhim kho corrosion kuj, tshwj xeeb tshaj yog tiv thaiv chlorides thiab pitting / crevice corrosion, ua rau nws haum rau marine thiab tshuaj ua daim ntaub ntawv.
