ST45.8 boiler tubing yog ib qho kev lag luam feem ntau siv nyob rau hauv siab -siab boiler systems kom tiv taus siab kub thiab siab tej yam kev mob, nrog rau cov khoom xws li cua sov nto raj, economizers, thiab superheaters. Nws feem ntau ua haujlwm ntawm qhov siab tshaj 9.8 MPa thiab nyob rau hauv qhov kub ntawm 450℃txog 650 degree. Cov raj no yog tsim los siv kub- dov lossis txias- txheej txheem kos duab.
Chemical Composition (Mass Fraction, %)
| Element | Cov pa roj carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|---|
| Ntau yam | Tsawg dua lossis sib npaug li 0.21 | Tsawg dua lossis sib npaug li 0.35 | Tsawg dua lossis sib npaug rau 1.20 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.035 |
Mechanical Properties (ntawm chav tsev kub)
| Khoom | Tensile zog (Rm) | Yield zog (ReL) | Elongation tom qab Fracture (A) |
|---|---|---|---|
| Ntau yam | 335-480 MPa | Ntau dua lossis sib npaug li 235 MPa | Ntau dua lossis sib npaug li 20% |
Lub cev thiab Mechanical Performance
| Khoom | Tus nqi |
|---|---|
| Impact Zog (Akv) | Ntau dua lossis sib npaug rau 35 J (kev lees txais engineering ib txwm, ua raws li GB5310 20G) |
| Brinell Hardness (HBW) | Tsawg dua los yog sib npaug rau 156 (nyob rau hauv annealed lossis normalized mob) |
ST45.8 seamless boiler raj tau dav siv hauv cov teb hauv qab no vim lawv qhov kev ua tau zoo heev:
(1) Petrochemical kev lag luam: Siv rau kev thauj khoom siab - kub thiab siab - cov roj thiab cov pa tawm, los yog ua cov khoom siv rau cov reactors thiab cov cua kub exchangers.
(2) Kev lag luam fais fab: Siv nyob rau hauv siab - kub thiab siab - cov cuab yeej siv siab xws li cov kav dej boiler thiab superheaters.
(3) Machinery manufacturing: Siv los ua raw khoom rau precision Cheebtsam xws li hydraulic cylinders thiab pneumatic thooj voos kheej kheej.
(4) Lwm cov kev lag luam: Kuj tseem muaj qee yam kev siv hauv kev lag luam xws li kev tsim nkoj thiab kev tsim tsheb.
