A672 qib twg B70 raj ua los ntawm?
ASTM A672 Qib B70 raj yog lub siab-zog, cov raj hlau tsis muaj feem ntau siv rau cov ntawv thov kev lag luam hauv nruab nrab, qhov ntsuas kub thiab kub. Hauv qab no cov ncauj lus kom ntxaws txog cov yeeb nkab hlau:
Cov khoom siv thiab qauv
ASTM A672 B70 cl22 yeeb nkab belems rau cov pa roj carbon steel thiab conforms rau electrofusion-welded steel yeeb nkab tshwj xeeb rau kev siv hauv nruab nrab, kub siab, thiab kev pabcuam siab thiab siab siab.
Tshuaj Muaj Tshuaj
Tshuaj lom neeg muaj pes tsawg leeg ntawm cov yeeb nkab hlau no suav nrog cov roj carbon (c), si) (mn), phosphorus (p), thiab leej faj (s). Piv txwv li, cov ntsiab lus ntawm cov pa roj carbon muaj peev xwm ua tau li {{{{}}}. 13 rau ib xees. 13 rau ib xees. 13 rau ib xees. 13
| Muaj pes tsawg | C | Si | Mn | P | S | |
|---|---|---|---|---|---|---|
| Thickness tsawg dua los yog sib npaug rau 25mm | Lub min | - | 0.13 | - | - | - |
| Tus zuag | 0.31 | 0.45 | 1.3 | 0.025 | 0.025 |
Cov Khoom Siv Neeg Kho Tshuab
ASTM A672 B70 cl22 yeeb nkab muaj lub zog siab thiab zoo corrosion tsis kam rau cov ntawv thov siab. Cov kws kho mob tshwj xeeb, xws li tensile thiab lees lub zog, ua kom muaj zog txhim khu kev ua haujlwm nyob rau hauv cov kev mob siab thiab kub.
