Dab tsi yog A691 Pipe Khoom?
ASTM A691 longitudinal welded yeeb nkab yog chromium-molybdenum (Cr-Mo) alloy hluav taws xob- fusion-welded (EFW) steel yeeb nkab rau siab - kub, siab - cov kav dej siab. Nws yog dav siv nyob rau hauv cov roj av, tshuaj thiab hluav taws xob industries, muab siab -kub tsis kam, siab - siab endurance thiab corrosion kuj.
astm a691 tshuaj muaj pes tsawg leeg
| 1 CR | 1-1/4 CR | 2-1/4 CR | 5 CR | 9 ib CR | 91 | |
| C | 0.05-0.17 | 0.05-0.17 | 0.05-0.15 | 0.15 | 0.15 | 0.08-0.12 |
| Mn | 0.40-0.65 | 0.40-0.65 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| P | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 |
| S | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 |
| Si | 0.15-0.40 | 0.50-0.80 | 0.50 | 0.50 | 1.00 | 0.20-0.50 |
| Cr | 0.80-1.15 | 1.00-1.50 | 2.00-2.50 | 4.00-6.00 | 8.00-10.00 | 8.00-9.50 |
| Mo | 0.45-0.60 | 0.45-0.65 | 0.90-1.10 | 0.45-0.65 | 0.90-1.10 | 0.85-1.05 |
| V | – | – | – | – | 0.04 | 0.18-0.25 |
ASTM A691 sib npaug
ASTM A691 VSASTM A671 Cov Khoom Siv Hluav Taws Xob
| Kev sib piv | ASTM A691 Cov Lus Qhia Tshwj Xeeb | ASTM A671 Cov Khoom Siv Hluav Taws Xob |
|---|---|---|
| Lub hom phiaj tseem ceeb | Cr-Mo alloy EFW yeeb nkab rau siab - kub, siab - kev pabcuam siab | Cov pa roj carbon / carbon-manganese EFW yeeb nkab rau qis- kev pabcuam kub |
| Hom khoom | Cr-Mo alloy (piv txwv li. 1.25Cr-0.5Mo) | Carbon steel / carbon{0}}manganese hlau |
| Qhov kev pabcuam kub | Txog li 650 C | Txog li 300 C |
| Chav kawm muaj zog | Ib chav kawm A691 (xws li CM-65, CM-70, CMSH-70) | Qib 60/65 (415-485 MPa siv) |
| Cov txheej txheem tseem ceeb | Yuav tsum normalizing (grain refinement) | Tswj dov lossis normalizing (yeem) |
| Kev tshuaj xyuas | High -kub tensile test, hardness scan | Tsawg- ntsuas qhov kub thiab txias (-46 C) |
| Corrosion kuj | Oxidation/sulfidation kuj los ntawm Cr-Mo alloy | Relies on coatings los yog corrosion inhibitors |
Daim ntawv thov ntawm A691 Steel Pipes
- Kev lag luam roj thiab roj: A691 steel kav yog dav siv nyob rau hauv cov roj thiab cov kav xa hluav taws xob, ua cov haujlwm tseem ceeb hauv kev thauj mus los thiab ua kom muaj kev ruaj ntseg ntawm cov khoom siv hluav taws xob.
- Kev lag luam tshuaj: Vim nws muaj zog corrosion kuj, A691 steel kav yog dav siv nyob rau hauv cov txheej txheem chemical pipelines kom muaj kev nyab xeeb thiab ruaj khov ntawm cov chaw tsim khoom.
- Kev Tsim Kho Kev Tsim Kho: Hauv kev tsim kho kev lag luam, A691 steel kav yog siv rau kev txhawb nqa thiab lwm yam kev siv, muab kev tiv thaiv txhim khu kev qha rau cov haujlwm tsim kho vim lawv lub zog thiab ruaj khov.
- Machinery Manufacturing: Raws li cov khoom siv rau cov khoom siv kho tshuab, A691 steel kav yog siv rau hauv kev tsim khoom ntawm ntau yam khoom siv tshuab, ua kom muaj kev ua haujlwm zoo thiab kev pabcuam lub neej ntawm cov tshuab.
A691 Alloy Steel PipesHoobkas
