ASTM A53M yog Metric version ntawm ASTM A53 tus qauv, uas qhia txog cov kev xav tau rau cov pa roj carbon hlau thiab cov kev siv siab, nrog rau kev tsim kho dav dav. Ntawm no yog cov ncauj lus kom ntxaws:
1. ** Tus Txiaj Ntsig **:
- Npog seamless thiab welded (hluav taws xob-tiv thaiv welded, rauv-welded) dub thiab kub-dipped steel kav.
- Tsim nyog rau cov khoom siv tshuab, kev ua kom pom kev siab, thiab cov ntawv thov kev tsim qauv, tab sis tsis yog rau kev siv kub (tsis zoo li astm A106).
2. ** Hom thiab qib kawm **:
- ** Hom **:
- ** HOM F **: Rauv-welded (txuas ntxiv weld), feem ntau qib A.
- ** HOM E **: hluav taws xob-ua welded (ERW), qib A thiab B.
- ** Hom S **: Seamless, Qib A thiab B.
- ** QIB **:
- ** QIB A **: QIB QIB (Yam tsawg kawg nkaus kom muaj zog 205 MPa, tensile lub zog 330 mpa).
- ** QIB B **: Lub zog siab dua (yam tsawg kawg nkaus (yam tsawg kawg nkaus -, tensile lub zog 415 MPA).
3. ** Cov khoom siv thiab chemistry **:
- Cov pa roj carbon nrog cov kev txwv ntawm cov pa roj carbon, mangelese, phosphorus, sulfur, tooj liab, chromium, molybdenum, thiab vanadium.
