I-ASTM A335 P5, ekwaziwa ngokuba yi-ASME SA335 P5, ngumbhobho wensimbi ongenamthungo ophantsi olungiselelwe inkonzo yobushushu obuphezulu.
I-P5 iqulethe i-4.00 ~ 6.00 % chromium kunye ne-0.45 ~ 0.65% ye-molybdenum, enika amandla abalaseleyo kunye nokusebenza phantsi kobushushu obuphakamileyo kunye noxinzelelo. Isetyenziswa kakhulu kwizixhobo ezinje ngeebhoyila, ii-superheaters, kunye nokutshintsha ubushushu.
Igama layo le-UNS yi-K41545.
Umenzi kunye nemeko
Imibhobho yentsimbi ye-ASTM A335 P5 iya kwenziwa ngenkqubo engenamthungo kwaye iya kuba shushu igqitywe okanye izotywe kubanda, njengoko kuchaziwe.
Iibhobho ezigqityiweyo ezishushu ziyimibhobho yensimbi engenamthungo eyenziwe kwiibhilithi ngokufudumeza kunye neenkqubo zokuqengqeleka, ngelixa iibhobho ezibandayo ziyimibhobho yentsimbi engenamthungo eveliswa ngokuzoba imibhobho eshushu egqityiweyo kwiqondo lokushisa.
Ukuba ungathanda ukufunda ngakumbi malunga neenkqubo zokwenziwa kwezi ntlobo zimbini zemibhobho yentsimbi engenamthungo, unokucofa“Yintoni uMbhobho weNsimbi ongenamthungo?”ngeenkcukacha ezithe vetshe.
Unyango lobushushu
Imibhobho ye-ASTM A335 P5 iyakufudunyezwa kwakhona kunyango lobushushu kunye nokunyangwa kobushushuukukhutshwa okupheleleyo okanye kwe-isothermal or normalizing kunye nobushushu.
Iimfuno ezikhethekileyo zibonisiwe kwitheyibhile engezantsi:
| IBanga | Uhlobo lokunyanga ubushushu | I-Subcritical Annealing okanye iqondo lobushushu |
| I-ASTM A335 P5 | i-anneal epheleleyo okanye ye-isothermal | - |
| lungelelanisa kwaye ube nomsindo | 1250 ℉ [675 ℃] imiz |
Imisebenzi ebandakanya ukufudumeza imibhobho yentsimbi ngaphezu kweqondo lokushisa elibalulekileyo, njenge-welding, i-flanging, kunye nokugoba okutshisayo, kufuneka ilandelwe unyango olufanelekileyo lokushisa.
Iindlela zokuvavanya ukwakheka kweekhemikhali kunye neempawu zoomatshini zemibhobho yentsimbi ye-P5 iya kuhambelana nezibonelelo ezifanelekileyo ze-ASTM A999.
| IBanga | Ukuqamba, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P5 | 0.15 ubuninzi | 0.30 ~ 0.60 | 0.025 ubuninzi | 0.025 ubuninzi | 0.50 ubuninzi | 4.00 ~ 6.00 | 0.45 ~ 0,65 |
Iipropati ze-Tensile
| IBanga | Tensile strength | Unikeze Amandla | Elongation kwi-2 ngaphakathi okanye i-50 mm |
| P5 | 60 ksi [415 MPa] min | 30 ksi [205 MPa] min | 30% min |
Iimpawu zokuqina
Umgangatho we-ASTM A335 awucacisi naziphi na iimfuno zobunzima kwimibhobho yensimbi ye-P5.
Uvavanyo lokucaba
Uvavanyo lokucaba luya kwenziwa kwaye kuthathwe iisampulu ngokuhambelana neemfuno ezifanelekileyo ze-ASTM A999, kwaye iziphelo zemibhobho enqamlekileyo zingasetyenziswa njengemizekelo.
Bend Test
Kumbhobho obubanzi bayo budlula i-NPS 25 kunye nomlinganiselo wobubanzi bodonga oluyi-7.0 okanye ngaphantsi kuya kufakwa kuvavanyo lokugoba endaweni yovavanyo lokucaba.
Imizekelo yokuvavanya i-bend iya kugoba kwiqondo lokushisa lokushisa nge-180 ° ngaphandle kokuqhekeka ngaphandle kwesahlulo esigobileyo. I-diameter yangaphakathi ye-bend iya kuba yi-1 [25 mm].
Imbonakalo
Umphezulu wombhobho wentsimbi uya kuba mpuluswa kwaye ulungelelene, ungabi namakhoko, imithungo, imilenze, iinyembezi, okanye izityuli.
Ukuba ubunzulu baso nasiphi na isiphene budlula i-12.5% yobukhulu bodonga lwegama okanye ukuba ubuninzi bodonga obuseleyo bungaphantsi kobuncinci obuchaziweyo, indawo iya kuthathwa njengenesiphene.
Xa udonga oluseleyo lusengaphakathi kwimida echaziweyo, i-defect inokususwa ngokugaya.
Ukuba ubuninzi bodonga oluseleyo bungaphantsi kwemfuneko encinci, i-defect iya kulungiswa nge-welding okanye isuswe ngokusika.
Ukunyamezela kwe-Diameter
Kwimibhobho eodolwe yiNPS [DN] okanye idiameter yangaphandle, umahluko kwidayamitha yangaphandle ayisayi kudlula iimfuno eziboniswe kwitheyibhile engezantsi:
| NPS [DN] uMyili | Ukwahluka okuvumelekileyo | |
| kwi. | mm | |
| 1/8 ukuya 1 1/2 [6 ukuya 40], intshi. | ±1/64 [0.015] | ±0.40 |
| Ngaphezulu kwe-1 1/2 ukuya ku-4 [40 ukuya kwi-100], i-intshi. | ±1/32 [0.031] | ±0.79 |
| Ngaphezulu kwe-4 ukuya kwi-8 [100 ukuya kuma-200], i-intshi. | -1/32 - +1/16 [-0.031 - +0.062] | -0,79 - +1,59 |
| Ngaphezulu kwesi-8 ukuya kwi-12 [200 ukuya kuma-300], i-intshi. | -1/32 - +3/32 [-0.031 - 0.093] | -0,79 - +2,38 |
| Ngaphezulu kwe-12 [300] | ±1 % yedayamitha yangaphandle echaziweyo | |
Ngombhobho oyalwe ukuba ungene ngaphakathi, i-diameter yangaphakathi ayiyi kuhluka ngaphezu kwe-1% ukusuka kwi-diameter yangaphakathi echaziweyo.
Ukunyamezela ukutyeba kweendonga
Ukongeza kwisithintelo esicacileyo sobunzima bodonga lombhobho obekwe sisithintelo sobunzima kwi-ASTM A999, ubukhulu bodonga lombhobho kuyo nayiphi na indawo buya kuba phakathi konyamezelo oluchazwe kwitheyibhile engezantsi:
| NPS [DN] uMyili | Unyamezelo, % ifomu ecacisiweyo |
| I-1/8 ukuya kwi-2 1/2 [6 ukuya ku-65] iquka. yonke imilinganiselo ye-t/D | -12.5 - +20.0 |
| Ngaphezulu kwe-2 1/2 [65], t/D ≤ 5% | -12,5 - +22,5 |
| Ngaphezulu kwe-2 1/2, t/D ＞ 5% | -12.5 - +15.0 |
| t = Ubungqingqwa beendonga obuchaziweyo; D = I-Diameter ecacisiweyo yangaphandle. | |
Iipayipi zensimbi ze-ASTM A335 P5 zisetyenziswa ngokukodwa kwiinkqubo zemibhobho ezisebenza phantsi kobushushu obuphezulu kunye neemeko zoxinzelelo oluphezulu.
Ngenxa yokumelana nobushushu obuphezulu kunye neepropathi zoomatshini, zisetyenziswa ngokubanzi kwi-petrochemical, ukuveliswa kwamandla, kunye namashishini okucoca.
Usetyenziso oluthile lubandakanya:
- Umbhobho webhoyila
- Izitshintshi zobushushu
- Imigca yenkqubo yePetrochemical
- Imibhobho yeplanti yamandla
- Iinqanawa zoxinzelelo lwe-boiler
| ASME | I-ASTM | EN | I-JIS |
| ASME SA335 P5 | I-ASTM A213 T5 | EN 10216-2 X11CrMo5+I | JIS G 3458 STPA25 |
Izinto:I-ASTM A335 P5 imibhobho yentsimbi engenamthungo kunye nezixhobo;
Ubungakanani:1/8 "ukuya kuma-24", okanye ilungiselelwe ngokweemfuno zakho;
Ubude:Ubude obungacwangciswanga okanye ukusika ukuze kulandelelwe;
Ukupakishwa:Ukugquma okumnyama, iziphelo ezigudileyo, izikhuseli zokuphela kombhobho, iikhreyithi zokhuni, njl.
Inkxaso:Ukuqinisekiswa kwe-IBR, ukuhlolwa kwe-TPI, i-MTC, ukusika, ukusetyenzwa, kunye nokwenza ngokwezifiso;
MOQ:1 m;
Immimiselo yokuhlawula:T/T okanye L/C;
Ixabiso:Qhagamshelana nathi ngamaxabiso emibhobho yentsimbi yamva nje T11.
