Hauv ASTM A213, ntxiv rau qhov yuav tsum tau ua rau cov khoom tensile thiab qhov nyuaj, cov kev sim hauv qab no kuj tseem yuav tsum tau ua: Kev Ntsuas Flattening thiab Kev Ntsuas Khoov.
ASTM A335 P22(ASME SA335 P22) yog cov yeeb nkab chromium-molybdenum alloy steel uas kub thiab tsis muaj seamless, siv dav hauvcov boiler, cov superheaters, thiab cua sovcov neeg pauv nyiaj.
Nws muaj 1.90%txog li 2.60% chromium thiab 0.87% txog 1.13% molybdenum, muaj kev tiv taus cua sov zoo heev, thiab kuj tsim nyog rau kev khoov, flanging, lossis kev ua haujlwm zoo sib xws.
UNS tus lej: K21590.
ASTM A335 yog tus qauv txheem rau cov kav dej ferritic alloy-steel uas tsis muaj qhov sib txuas uas npaj rau kev pabcuam kub siab. Nws yog siv dav hauv boilers, superheaters, heat exchangers, thiab lwm yam kev siv uas ua haujlwm nyob rau hauv qhov kub siab thiab siab siab. Ntxiv rau Qib P22, lwm cov qib alloy suav nrogP5 (UNS K41545), P9 (UNS K90941), P11 (UNS K11597), thiabP91 (UNS P90901).
Chaw Tsim Khoom thiab Mob
ASTM A335 P22 cov kav hlau yuav tsum ua los ntawm cov txheej txheem seamless thiab yuav tsum yog kub-tiav lossis txias-kos nrog kev kho tiav.
Cov kav hlau tsis muaj qhov txuasyog cov kav dej tsis muaj vuam, uas muab cov kav dej P22 steel nrog kev ruaj khov thiab kev ntseeg siab dua hauv qhov kub thiab txias thiab qhov chaw siab.
Kev Kho Mob Kub
Cov kav hlau P22 yuav tsum tau rov ua kom sov thiab kho cua sov los ntawm kev ua kom tiav tag nrho, isothermal annealing, lossis normalizing thiab tempering.
| Qib | Hom kev kho cua sov | Kev Kub Ntxhov los yog Kub Kub |
| ASTM A335 P22 | tag nrho los yog isothermal anneal | — |
| normalizes thiab txo qhov mob | 1250 ℉ [675 ℃] feeb |
Chromium (Cr) thiab molybdenum (Mo) yog cov khoom tseem ceeb hauv P22 hlau, txhim kho lub zog kub siab, tiv taus oxidation, thiab ruaj khov. Cov tshuaj lom neeg tshwj xeeb tau qhia hauv qab no:
| Qib | Cov khoom xyaw,% | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P22 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 siab tshaj | 0.025 siab tshaj | 0.50 siab tshaj | 1.90 ~ 2.60 | 0.87 ~ 1.13 |
Cov kev ntsuam xyuas cov khoom siv kho tshuab ntawm P22 yuav tsum tau ua raws li cov kev cai ntawm ASTM A999.
Cov Khoom Tensile
| Qib | ASTM A335 P22 | |
| Lub zog tensile, min | 60 ksi [415 MPa] | |
| Lub zog tawm los, min | 30 ksi [205 MPa] | |
| Kev ntev hauv 2 nti lossis 50 hli (lossis 4D), feeb | Ntev ntev | Txoj kab hla |
| Qhov ntev tsawg kawg nkaus rau phab ntsa 5/16 nti [8 hli] thiab ntau dua hauv qhov tuab, kev sim kab txaij, thiab rau txhua qhov me me uas tau sim hauv seem tag nrho | 30% | 20% |
| Thaum siv tus qauv puag ncig 2 nti lossis 50 hli gage ntev lossis cov qauv me dua nrog qhov ntev gage sib npaug rau 4D (4 npaug ntawm txoj kab uas hla) | 22% | 14% |
| Rau kev sim kab txaij, kev txiav tawm rau txhua 1/32 hauv [0.8 hli] txo qis hauv phab ntsa tuab hauv qab 1/32 hauv [8 hli] los ntawm qhov ntev tsawg kawg nkaus ntawm cov feem pua hauv qab no yuav tsum tau ua | 1.50% | 1.00% |
Cov Khoom Siv Hardness
Tus qauv ASTM A335 tsis teev cov kev cai tshwj xeeb rau cov kav hlau P22.
Lwm Yam Khoom Siv Xeem
Kev kam rau txoj kab uas hla
Rau cov yeeb nkab uas tau txiav txim los ntawm NPS [DN] lossis sab nraud txoj kab uas hla, kev hloov pauv ntawm sab nraud txoj kab uas hla yuav tsum tsis pub tshaj qhov yuav tsum tau ua raws li qhia hauv lub rooj hauv qab no:
| Tus Neeg Xaiv NPS [DN] | Kev Hloov Pauv Uas Tso Cai | |
| nyob rau hauv. | mm | |
| 1/8 txog 1 1/2 [6 txog 40], nti. | ±1/64 [0.015] | ±0.40 |
| Tshaj 1 1/2 txog 4 [40 txog 100], nti. | ±1/32 [0.031] | ±0.79 |
| Tshaj 4 txog 8 [100 txog 200], nti. | -1/32 - +1/16 [-0.031 - +0.062] | -0.79 - +1.59 |
| Tshaj 8 txog 12 [200 txog 300], nti. | -1/32 - +3/32 [-0.031 - 0.093] | -0.79 - +2.38 |
| Tshaj 12 [300] | ±1% ntawm qhov ntsuas sab nraud uas tau teev tseg | |
Rau cov yeeb nkab uas raug txiav txim kom muaj txoj kab uas hla sab hauv, txoj kab uas hla sab hauv yuav tsum tsis txhob txawv ntau tshaj 1% ntawm txoj kab uas hla sab hauv uas tau teev tseg.
Kev kam rau siab ntawm phab ntsa
Ntxiv rau qhov kev txwv tsis pub dhau ntawm phab ntsa tuab rau cov yeeb nkab uas raug txwv los ntawm qhov hnyav hauv ASTM A999, phab ntsa tuab rau cov yeeb nkab ntawm txhua qhov chaw yuav tsum nyob hauv qhov kev kam rau siab uas tau teev tseg hauv lub rooj hauv qab no:
| Tus Neeg Xaiv NPS [DN] | Kev kam rau siab |
| 1/8 txog 2 1/2 [6 txog 65] suav nrog txhua qhov piv ntawm t/D | -12.5% ~ +20.0% |
| Saum toj no 2 1/2 [65], t/D ≤ 5% | -12.5% ~ +22.5% |
| Saum toj no 2 1/2, t/D > 5% | -12.5% ~ +15.0% |
| ASME | ASTM | EN | DIN | JIS |
| ASME SA335 P22 | ASTM A213 T22 | DIN 10216-2 10CrMo9-10 | DIN 17175 10CrMo9-10 | JIS G 3458 STPA25 |
Khoom siv:ASTM A335 P22 cov kav hlau tsis muaj seamless thiab cov khoom siv;
Loj:1/8 "txog 24", lossis kho raws li koj xav tau;
Ntev:Qhov ntev random lossis txiav kom txiav txim;
Ntim:Cov txheej txheem dub, cov qhov kawg beveled, cov yeeb nkab kawg tiv thaiv, cov ntoo crates, thiab lwm yam.
Kev Txhawb Nqa:Daim ntawv pov thawj IBR, kev tshuaj xyuas TPI, MTC, kev txiav, kev ua tiav, thiab kev kho kom haum;
MOQ:1 m;
Cov nqe lus them nqi:T/T los yog L/C;
Nqe:Tiv tauj peb kom paub txog cov nqi yeeb nkab hlau T11 tshiab kawg;
