ASTM A179 yogUS tus qauvrauThaum tshav kub kub exchanger thiab condenser tubes, feem ntau ua los ntawmqis- carbon steel. Cov txheej txheem tsim khoom suav nrogdaim duab txias, uas kom aheev du sab hauv thiab sab nrauv tiavthiabzoo heev phab ntsa thickness uniformity. Vim nwsqis-carbon muaj pes tsawg leeg, A179 steel yeeb nkab nthuav tawmsuperior weldability, txo qhov kev pheej hmoo ntawm cov kab nrib pleb thiab lwm yam tsis xws luag. Nws kuj muajzoo thermal conductivity, uas yog ib qho tseem ceeb rau nws daim ntawv thov nyob rau hauv lub tshav kub exchanger khoom.
CovASTM A179 Cov khoom lag luamtxheem siv rauseamless txias-kos qis- carbon steel hlabsiv hauv kev tsim khoomThaum tshav kub kub exchangers, condensers, thiab cov khoom siv hluav taws xob zoo sib xws. Tus qauv npog cov hlab nrogSab nraud diameters (OD) xws li 1/8 nti mus rau 3 nti (3.2 mm txog 76.2 mm). Txawm li cas los xij, tubes nrogODs thiab phab ntsa thicknesses me dua li qhov no kuj tseem siv tau, mas theCov cuab yeej cuab tam yuav tsis sivrau tubesOD me dua 1/8 nti (3.2 hli)lub aphab ntsa thickness tsawg dua 0.015 nti (0.4 hli).
ASTM A179 Chemical Composition (%)
Cov tshuaj muaj pes tsawg leeg xav tau rauASTM A179 Cov khoom lag luam(seamless txias-kho qis- carbon steel tubes) yog raws li nram no:
| Element | C (Carbon) | Manganese (Mn) | P (phosphorus) | S (Sulfur) |
|---|---|---|---|---|
| Min | 0.06% | 0.27% | - | - |
| Max | 0.18% | 0.63% | 0.035% | 0.035% |
ASTM A179 Mechanical Properties
Mechanical Properties ntawmASTM A179 Cov khoom lag luam(seamless txias-kho qis- carbon steel tubes) yog raws li nram no:
| Khoom | Cim | Kev xav tau |
|---|---|---|
| Tensile zog | σb | Ntau dua lossis sib npaug li 325 MPa |
| Yield zog | σs | Ntau dua lossis sib npaug li 180 MPa |
| Elongation | δ | Ntau dua lossis sib npaug li 35% |
Tiv tauj peb rau A179 Boiler Tube Rau Kev Kub Siab