SA179 Txias -Kaw Seamless Steel Tubes
Khoom siv thiab kev sib xyaw
Cov khoom siv yogqis- carbon steel(cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.06%) nrog adensified microstructureua tiav los ntawm txias - kos duab.
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm
Thermal conductivity: Thermal conductivity ncav cuag45-50 W/(m·K), ho siab dua li cov pa roj carbon steel kav, ua rau nws zoo tagnrho rau kev siv cua sov.
Mechanical Strength: Tensile zog Ntau dua los yog sib npaug325 MPa, yield zog Ntau dua los yog sib npaug180 MPa, tuav cov qauv kev ruaj ntseg txawm tias nyob rau hauv siab - qhov kub thiab txias.
Dimensional raug: Outer inch kam rau ua tswj nyob rau hauv± 0.10 hli, phab ntsa thickness sib txawv tsis tshaj±10%, xyuas kom sealing kev ua tau zoo thaum lub sij hawm sib dhos khoom.
Nto ZooTom qab acid pickling thiab phosphating, nto roughnessRa Tsawg dua lossis sib npaug li 0.8 μm, zoo txo cov dej tsis kam.
Corrosion Resistance
Cov ntaub ntawv qhiasuperior kev ua tau zoo nyob rau hauv sulfide kev nyuaj siab corrosion ib puag ncigpiv rau304 stainless hlau, uas yog qhov tseem ceeb hauv nws lub sijhawm ntev - daim ntawv thov hauv cov khoom siv petrochemical.
Kev tsim khoom thiab ntawv pov thawj
Raws li cov ntaub ntawv cov khoom lag luam los ntawm Baidu Aiqicha, cov tuam txhab ua lag luam hauv tsev tau dhau daim ntawv pov thawj thoob ntiaj teb xws liASMEthiabPED. Lawv SA179 steel hlab tuaj yeem ua haujlwm tsis tu ncua rauTshaj 100,000 teev ntawm 450 degree.
SA-210 Gr.A1 Seamless Steel Tubes
Standard thiab Composition
Cov ntaub ntawv raws li nram noASME SA-210/SA-210M, ASME tus qauv rau seamless steel raj siv hauv boilers thiab superheaters.
Tshuaj muaj pes tsawg leeg
Cov pa roj carbon (C): Tsawg dua los yog sib npaug li 0.27% (muab lub zog tab sis txo qhov toughness thiab weldability yog ntau dhau).
Manganese (Mn): 0.29% - 0.93% (txhim kho lub zog, toughness, thiab kub ua haujlwm).
Silicon (Si): Ntau dua lossis sib npaug li 0.10% (siv rau deoxidation thiab txhim kho lub zog, pab oxidation kuj).
Phosphorus (P) thiab Sulfur (S): Tsawg dua lossis sib npaug li 0.035% (ntau dhau txo qhov tawv, ua rau kub / txias brittleness).
Mechanical Properties
Tensile zog: Ntau dua los yog sib npaug rau 415 MPa (tiv thaiv pob txha nyob rau hauv kev ntxhov siab).
Yield zog: Ntau dua los yog sib npaug rau 255 MPa (tiv thaiv tsis tau deformation nyob rau hauv ib txwm siab).
Elongation: Ntau dua lossis sib npaug li 30% (ua kom lub zog nqus tau thaum muaj kev cuam tshuam lossis tshaj dhau).
Kev tshuaj xyuas thiab kuaj
Kev tshuaj xyuas qhov muag: Txheeb xyuas cov kab nrib pleb, folds, laps, delamination, thiab scale defects. Deg imperfections (xws li, khawb, dents) yuav tsum muaj raws li kev txwv.
Dimensional raug: Ntsuas sab nraud / sab hauv txoj kab uas hla, phab ntsa thickness, thiab ntev. Kev kam rau siab tswj hwm nruj heev rau siab -siab / siab- kev siv kub.
Mechanical Tests: suav nrog kev sim tensile (yield zog, tensile zog, elongation) thiab kev ntsuam xyuas cuam tshuam (tsawg-kub toughness).
Tsis yog -Kev kuaj kev puas tsuaj: Siv ultrasonic thiab eddy kev kuaj tam sim no los kuaj xyuas sab hauv / sab nraud.
Daim ntawv thov
Siv hauvfais fab nroj tsuag boilers (dej phab ntsa, economizers, low-kub superheaters, headers, thiab steam pipes) yuav tsum tau siab -kub/siab-siab tsis kam thiab zoo heev tshav kub hloov.
Kev sib piv tshuaj lom neeg
| Element | ASME SA179 / SA179M | ASME SA-210 Gr.A1 |
|---|---|---|
| Cov pa roj carbon (C) | 0.06–0.18% | Tsawg dua lossis sib npaug li 0.27% |
| Manganese (Mn) | 0.27–0.63% | 0.29–0.93% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.37% (tsis muaj kev txwv qis dua) | Ntau tshaj los yog sib npaug rau 0.10% (qhib deoxidation yuav tsum tau) |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.035% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.035% |
| Lwm Yam Khoom | Tsis muaj Cr, Ni, Mo alloy yuav tsum | Tsis muaj Cr, Ni, Mo alloy yuav tsum |
Mechanical Properties Sib piv
| Khoom | ASME SA179 / SA179M | ASME SA-210 Gr.A1 |
|---|---|---|
| Tensile zog | Ntau dua lossis sib npaug li 325 MPa | Ntau dua lossis sib npaug li 415 MPa |
| Yield zog | Ntau dua lossis sib npaug li 180 MPa | Ntau dua lossis sib npaug li 255 MPa |
| Elongation | Ntau dua lossis sib npaug li 35% | Ntau dua lossis sib npaug li 30% |
| Hardness | Tsawg dua lossis sib npaug rau 72 HRB | Tsawg dua lossis sib npaug rau 79 HRB |