Umbhobho wentsimbi ye-alloy engenamthungoI-ASTM A335 P91, umbhobho wentsimbi ongenamthungo osetyenziswa kwiityhubhu zebhoyila, iityhubhu zokutshintsha ubushushu kunye nezinye iimboni, ungasetyenziswa njengemibhobho yentsimbi kwii-superheaters ezishushu kakhulu kunye nezifudumezi-moya ezishushu kakhulu kwiibhoyila ezingabalulekanga kangako nezingabalulekanga kakhulu ezinamaqondo obushushu odonga angama-≤625°C, kunye nodonga. Ii-headers ezishushu kakhulu kunye nemibhobho yomphunga enamaqondo obushushu angama-≤600℃ nazo zingasetyenziswa njengee-nuclear power heat exchangers kunye nee-petroleum cracking unit furnace tubes.
I-ASTM A335 P91 yintsimbi ye-alloy enobushushu obuphezulu eyintsimbi ye-chromium-molybdenum ene-alloy ephantsi. Isetyenziswa kakhulu kwiipayipi nakwizixhobo phantsi kobushushu obuphezulu kunye neendawo ezixineneyo, ezifana ne-petrochemical, umbane, izityalo zamandla enyukliya kunye nezinye iindawo. Izinto eziphambili zale nto yi-chromium, i-molybdenum, i-copper, i-manganese, i-silicon, i-phosphorus, i-sulfur kunye nezinye izinto. Umxholo we-chromium kunye ne-molybdenum uphezulu, nto leyo enokuphucula ukumelana nobushushu obuphezulu kunye nokumelana ne-oxidation kwezinto.
Izinto ze-ASTM A335 P91 zineempawu ezintle kakhulu zoomatshini kwaye zisenokomelela kakuhle phantsi kobushushu obuphezulu kunye neendawo ezixineneyo. Ezi zinto zikwamelana kakhulu ne-oxidation, nto leyo enokwandisa ubomi benkonzo yemibhobho nezixhobo. Ukongeza, ezi zinto zikwasebenza kakuhle ekudibaniseni, nto leyo eyenza ulwakhiwo kunye nokugcinwa kube lula.
Ngenxa yokuba izinto ze-ASTM A335 P91 zineempawu ezintle kakhulu, zisetyenziswa kakhulu kwiindawo ezithile ezinobushushu obuphezulu kunye noxinzelelo oluphezulu. Umzekelo, kwishishini le-petrochemical, iipayipi kunye nezixhobo ezenziwe nge-ASTM A335 P91 zinokumelana nokukhukuliseka kweekhemikhali kunye nokugqwala phantsi kobushushu obuphezulu kunye noxinzelelo, ukuqinisekisa ukusebenza ngokukhuselekileyo kwezixhobo. Kwimimandla yamandla ombane kunye nezityalo zamandla enyukliya, iipayipi kunye nezixhobo ezenziwe nge-ASTM A335 P91 zinokumelana nokugqwala kunye nokugqwala komphunga kunye nomphunga wamanzi kunye nezinye izinto ezisetyenziswa phantsi kobushushu obuphezulu kunye noxinzelelo, ukuqinisekisa ukusebenza okuqhelekileyo kwezixhobo.