ASTM A213 T91(ASME SA213 T91) ke phala e sebelisoang ka tloaelo ea ferritic alloy seamless steel e nang le 8.0% ho 9.5% Cr, 0.85% ho 1.05% Mo, le likarolo tse ling tsa microalloying.
Keketso ena ea alloying e fana ka li-tubes tsa tšepe tsa T91 tse nang le matla a matla a mocheso o phahameng, ho hanyetsa ha metsi, le ho hanyetsa oxidation, ho etsa hore li sebelisoe haholo ho li-boilers, li-superheaters le li-exchanger tsa mocheso tse sebetsang tlas'a maemo a phahameng a mocheso le khatello e phahameng.
Nomoro ea UNS: K90901.
Liphaephe tsa tšepe tsa T91 li ka aroloa ka har'aMofuta oa 1leMofuta oa 2, ka phapang e kholo e le liphetoho tse fokolang tsa metsoako ea lik'hemik'hale.
Mofuta oa 2 o na le litlhoko tse thata bakeng sa likarolo tsa lik'hemik'hale; mohlala, litaba tsa S li fokotsehile ho tloha ho max 0.010% ho Mofuta oa 1 ho ea ho 0.005%, 'me meeli e ka holimo le e ka tlaase ea likarolo tse ling e boetse e lokisoa.
Mofuta oa 2 oa mofuta oa 2 o reretsoe haholo-holo bakeng sa maemo a phahameng a mocheso a phahameng kapa a senyang, a fanang ka boima bo ntlafetseng le ho hanyetsa ho thekesela.
Ka mor'a moo, ha re shebisiseng litlhoko tsa sebopeho sa lik'hemik'hale tsa Mofuta oa 1 le Mofuta oa 2 tlhahlobong ea sehlahisoa.
| Moetso, % | Mofuta oa 1 oa ASTM A213 T91 | Mofuta oa 2 oa ASTM A213 T91 |
| C | 0.07 ~ 0.14 | 0.07 ~ 0.13 |
| Mn | 0,30 ~ 0,60 | 0,30 ~ 0,50 |
| P | 0.020 max | |
| S | 0.010 max | 0.005 boholo |
| Si | 0,20 ~ 0,50 | 0.20 ~ 0,40 |
| Ni | 0.40 boholo | 0.20 max |
| Cr | 8.0 ~ 9.5 | |
| Mo | 0.85 ~ 1.05 | 0.80 ~ 1.05 |
| V | 0.18 ~ 0,25 | 0.16 ~ 0,27 |
| B | - | 0.001 max |
| Nb | 0.06 ~ 0.10 | 0.05 ~ 0.11 |
| N | 0.030 ~ 0.070 | 0.035 ~ 0.070 |
| Al | 0.02 max | 0.020 max |
| W | - | 0.05 boholo |
| Ti | 0.01 max | |
| Zr | 0.01 max | |
| Lintlha Tse Ling | - | Ke: 0.10 max Sb: 0.003 boholo Sn: 0.010 max Joalo ka: 0.010 max N/Al: 4.0 mets |
T91 Mofuta oa 1 le oa 2 li na le phapang e fokolang ea lik'hemik'hale, empa li arolelana litlhoko tse tšoanang bakeng sa thepa ea mochine le phekolo ea mocheso.
Tensile Properties
| Kereiti | Matla a tšepe | Kotulo Matla | Elongation ho 2 in. kapa 50 mm |
| Mofuta oa 1 le oa 2 oa T91 | 85 ksi [585 MPa] mets | 60 ksi [415 MPa] mets | 20% mets |
Lintho tse thata
| Kereiti | Brinell / Vickers | Rockwell |
| Mofuta oa 1 le oa 2 oa T91 | 190 ho isa ho 250 HBW 196 ho isa ho 265 HV | 90 HRB ho isa ho 25 HRC |
Teko e bataletseng
Mokhoa oa teko o tla lumellana le litlhoko tse amehang tsa Clause 19 ea ASTM A1016.
Teko e le 'ngoe ea ho batalla e tla etsoa ho mehlala ho tloha pheletsong e' ngoe le e 'ngoe ea tube e phethiloeng, eseng e sebelisetsoang tlhahlobo ea ho phatloha, ho tloha lotho ka 'ngoe.
Flaring Test
Mokhoa oa teko o tla lumellana le litlhoko tse amehang tsa Clause 22 ea ASTM A1016.
Teko e le 'ngoe ea ho phatloha e tla etsoa ho mehlala ho tloha pheletsong e 'ngoe le e' ngoe ea tube e felileng, eseng e sebelisetsoang tlhahlobo ea ho bata, ho tsoa lotho ka 'ngoe.
Moetsi le Boemo
Li-tubes tsa ASTM A213 T91 li tla etsoa ka mokhoa o se nang moeli 'me e tla be e felile ka ho chesa kapa e felile ka serame, joalo ka ha ho hlokahala.
Lipeipi tsa tšepe tse se nang moeli, ka sebopeho sa bona se tsoelang pele le se se nang li-welds, se aba khatello ea kelello ka mokhoa o ts'oanang ka tlas'a mocheso o phahameng, khatello e phahameng, le maemo a thata a ho laela, ho fana ka matla a phahameng, ho tiea le ho hanyetsa mokhathala.
Kalafo ea Mocheso
Liphaephe tsohle tsa tšepe tsa T91 li tla tsosolosoa le ho phekoloa ka mocheso ho latela litlhoko tse boletsoeng tafoleng.
Phekolo ea mocheso e tla etsoa ka thoko le ho kenyelletsa ho futhumatsa bakeng sa ho theha ho chesa.
| Kereiti | Mofuta oa phekolo ea mocheso | Austenitizing / Tharollo Phekolo | Subcritical Annealing kapa Mocheso |
| Mofuta oa 1 le oa 2 oa T91 | normalize le bohale | 1900 - 1975 ℉ [1040 - 1080 ℃] | 1350 - 1470 ℉ [730 - 800 ℃] |
Bakeng sa lisebelisoa tsa Sehlopha sa 2 sa T91, phekolo ea mocheso e tla etsa bonnete ba hore ho latela ho fokotsa sekhahla sa ho pholisa ho tloha ho 1650 °F ho ea ho 900 °F [900 °C ho ea ho 480 °C] ha ho butle ho feta 9 °F / min [5 °C/ min].
Botenya ba li-tubing tsa T91 le botenya ba lebota hangata bo entsoe ka bophara ba ka hare ho tloha ho 3.2 mm ho ea ho bophara ba kantle ba 127 mm, le botenya ba lebota bo tlase ho tloha ho 0.4 mm ho isa ho 12.7 mm.
Mefuta e meng ea liphaephe tsa tšepe tsa T91 le tsona li ka fanoa, ha feela litlhoko tse ling tsohle tsa ASTM A213 li finyelloa.
Mamello ea li-dimensional ea T91 e tšoana le ea T11. Bakeng sa lintlha, u ka sheba hoT11 Litekanyo le Mamello.
| UNS | ASME | ASTM | EN | GB |
| K90901 | ASME SA213 T91 | ASTM A335 P91 | EN 10216-2 X10CrMoVNb9-1 | GB/T 5310 10Cr9Mo1VNbN |
Sehlahisoa:ASTM A213 T91 Mofuta oa 1 le Mofuta oa 2 oa liphaephe tsa tšepe tse se nang seamless le lisebelisoa;
Boholo:1/8" ho isa ho 24", kapa e hlophisitsoeng ho latela litlhoko tsa hau;
Bolelele:Bolelele bo sa reroang kapa sehiloeng ho laela;
Sephutheloana:Ho roala ho ntšo, lipheletso tse betliloeng, litšireletseho tsa liphaephe, mabokose a lehong, jj.
Tšehetso:Setifikeiti sa IBR, tlhahlobo ea TPI, MTC, ho itšeha, ho sebetsa le ho e etsa;
MOQ:1 m;
Melao ea Tefo:T/T kapa L/C;
Theko:Ikopanye le rona bakeng sa litheko tsa morao-rao tsa lipeipi tsa tšepe tsa T91.
