ASTM A335 P9 yog cov hlau tsis tshua muaj hlau uas feem ntau siv rau qhov kub thiab txias. Cov hlau no tau tsim tshwj xeeb rau cov ntawv thov uas xav tau lub zog kub thiab corrosion kuj. Qhov zoo, kev siv, thiab cov khoom ntawm ASTM A335 P9 alloy steel tau tham hauv kab lus no.
ASTM A335 P9 alloy steel yog cov hlau tsis tshua muaj hlau uas muaj cov hlau alloying xws li chromium thiab molybdenum. Nws yog txhais tau tias muaj siab thermal zog thiab corrosion kuj. Xws li cov khoom no txhim kho steel lub zog thiab hardness. Vim tias nws lub zog tensile siab thiab cov txiaj ntsig zoo, ASTM A335 P9 alloy steel yog haum rau cov ntawv thov kom muaj zog thiab tawv. Corrosion kuj ua rau cov hlau tsim nyog rau cov ntawv thov raug rau cov tshuaj hnyav lossis cov xwm txheej. Tsis tas li ntawd, P9 alloy steel tuaj yeem tiv taus qhov kub thiab txias yam tsis muaj zog lossis ua nkig. Yog li ntawd, nws yog haum rau kev siv kub-kub.
ASTM A335 P9 alloy steel yog them los ntawm ASTM A335 / ASME SA335, uas teev cov qauv rau high-temperature seamless ferritic alloy steel yeeb nkab. TS tuaj yeem muab ASTM A335 P9 cov kav dej hauv ntau qhov ntau thiab tsawg, nrog rau lwm cov kav hlau hlau raws li koj qhov tshwj xeeb.
Chemical Composition (%) ntawm ASTM A335 P9 Chrome Moly Alloy Steel
ASTM A335 P9 alloy steel muaj qhov tsawg kawg nkaus chromium cov ntsiab lus ntawm 8 feem pua thiab cov ntsiab lus siab tshaj molybdenum ntawm 0.90 feem pua. Carbon, manganese, silicon, phosphorus, thiab sulfur kuj muaj nyob rau hauv kab. Qhov tseeb muaj pes tsawg leeg ntawm cov hlau sib txawv nyob ntawm qhov chaw tsim khoom thiab daim ntawv thov.
| CHEMICAL COMPOSITION (%) | ||||||
| C, max | Mn | P, max | S, max | Si | Cr | Mo |
| 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
Mechanical Properties ntawm ASTM A335 P9 Chrome Moly Alloy Steel
| MECHANICAL PROPERTIES | ||
| Tensile zog, MPa, min | Yield zog, MPa, min | Elongation (%), min |
| 415 | 205 | 20 |
Lub cev muaj zog ntawm ASTM A335 P9 Chrome Moly Alloy Steel
| Lub cev muaj zog | |||||
| Qhov ntom | Melting Point | Modulus ntawm Elasticity | Tshwj xeeb kub muaj peev xwm | Coefficient ntawm Thermal Expansion | Thermal conductivity |
| 7.85 g / cm³ | 675 degree [1250 degree F] | 205 GPa | 0.46 J/g·K | 11.2 µm/m·K | 26.6 W/m·K |
ASTM A335 P9 alloy hlau yog feem ntau muab khoom noj thiab tempered. Qhov no suav nrog cua sov cov hlau kom kub li ntawm 880 degree mus rau 920 degree, ces cua txias lossis roj quenching, thiab tempering ntawm qhov kub ntawm 540 degree mus rau 660 degree.
Lub machinability ntawm ASTM A335 P9 alloy steel feem ntau suav hais tias yog qhov zoo. Cov txheej txheem ib txwm siv los ua nws; Txawm li cas los xij, qhov zoo ntawm hardness ntawm cov hlau ua rau nws nyuaj rau tshuab. Txawm hais tias ASTM A335 P9 alloy steel yog weldable, nws yuav tsum tau preheating thiab tom qab vuam kev kho cua sov kom txo qhov tawg thiab muab kev sib koom ua ke zoo tshaj plaws. Nws yog ib qho tseem ceeb rau kev siv cov txheej txheem vuam kom raug thiab muab tub lim hlau rau daim ntawv thov.
ASTM A335 P9 alloy steel feem ntau yog siv rau ntau yam kev siv uas yuav tsum tau muaj qhov kub thiab txias thiab corrosion kuj.
- Cov cuab yeej tsim hluav taws xob: boilers, turbines, thiab cua kub exchangers
- Petrochemical: tshuaj reactors, tshav kub exchangers, thiab distillation kab
- Roj thiab roj: roj thiab roj pipelines, drilling rigs, thiab lwm yam khoom siv
- Aerospace: tso pa system thiab lwm yam khoom
