ASTM A179 boiler raj yog lub raj kub kub boiler, feem ntau yog siv hauv cov khoom siv xws li boilers thiab superheaters nyob rau hauv high-temperature thiab high-pressure tej yam kev mob.
Raws li ASTM A179 tus qauv, lub raj boiler no muaj qhov kev pabcuam kub ntawm 371 degree (700 degree F) txog 649 degree (1200 degree F). Nyob rau hauv qhov kub thiab txias, cov kav hlau yuav tsum muaj oxidation zoo, corrosion kuj, siab kub zog thiab creep zog.
Kev tsim khoom:
Seamless thiab txias-kos duab
Kev kho cua sov:
Lub raj yuav tsum tau kho kom sov tom qab qhov kawg txias txias dhau ntawm qhov kub ntawm 1200 degree F lossis siab dua.
Surface condition:
Cov raj tiav yuav tsum tsis muaj nplai, me ntsis ntawm oxidation yuav tsis raug suav tias yog nplai.
Mechanical Tests Yuav Tsum Tau:
Flattening Test
Flaring xeem
Flange xeem
Kev kuaj Hardness
Hydrostatic xeem
1.1 Qhov kev qhia tshwj xeeb no suav nrog qhov tsawg kawg nkaus-phab ntsa-thickness, seamless txias-draw low-carbon steel raj rau tubular heat exchangers, condensers, thiab cov khoom siv hluav taws xob zoo sib xws.
1.2 Qhov kev qhia tshwj xeeb no suav nrog cov raj 1/8 txog 3 hauv. [3.2 txog 76.2 mm], suav nrog, nyob rau sab nraud.
Tshuaj muaj pes tsawg leeg
|
C |
Mn |
P Max |
S Max |
Si Max |
|
0.06-0.18 |
0.27-0.63 |
0.035 |
0.035 |
0.25 |
Mechanical khoom:
|
Tensile zog Ksi (Mpa) |
Min 47 (325) hnub |
|
Yield zog Ksi (Mpa) |
Min 26 (180) |
|
Elongation (50 hli)% |
Min 35 |
|
Hardness |
72 PAB |
