Specification A335 npog nominal thiab yam tsawg kawg nkaus phab ntsa thickness seamless ferritic alloy steel yeeb nkab rau siab kub daim ntaub ntawv. ASTM A335 yeeb nkab (ASME S / A335, Chorme-Moly) yog seamless ferritic alloy steel yeeb nkab siv hauv cov ntawv thov kub. Cov yeeb nkab xaj rau qhov kev qhia tshwj xeeb no yuav tsum tsim nyog rau kev khoov, flanging (vanstoning) thiab kev ua haujlwm zoo sib xws nrog rau fusion vuam. Cov qib P feem ntau yog P5, P9, P11, P22, thiab P91. Kev siv ntau tshaj ntawm P11, P22 thiab P91 qib yog nyob rau hauv kev lag luam fais fab thiab kev lag luam petrochemical. Qib P5 thiab P9 feem ntau siv hauv cov roj av refineries.
Kev xav tau tshuaj ntawm Alloy Steel Seamless Pipes
| Qib | P-5 | P-9 | P-11 | P-22 | P-91 | P-91 tseem yuav suav nrog cov hauv qab no: | |
| Element | UNS npe | K41545 | S50400 | K11597 | K21590 | K91560 | |
| Cov pa roj carbon | 0.15 max | 0.15 max | 0.05 - 0.15 | 0.05 - 0.15 | 0.08 - 0.12 | V ntawm 018 - 0.25 | |
| Manganese | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | N ntawm 0030 - 0.070 | |
| Phosphorus, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 | Ni ntawm 0.40 max | |
| Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 | Al ntawm 0.02 max | |
| Silicon | 0.50 max | 0.25 - 1.00 | 0.50 - 1.00 | 0.50 max | 0.20 -0.50 | Cb ntawm 006 - 0.10 | |
| Chromium | 4.00 - 6.00 | 8.00 - 10.00 | 1.00 - 1.50 | 1.90 - 2.60 | 8.00 - 9.50 | Ti ntawm 0.01 max | |
| Molybdenum | 0.45 -0.65 | 0.90 - 1.10 | 0.44 - 0.65 | 0.87 - 1.13 | 0.85 - 1.05 | Zr ntawm 0.01 max | |
