SA192 Seamless Steel Tube: Ib qho khoom siv tseem ceeb rau siab - Kub thiab Siab - Cov Khoom Siv Siab
SA192 seamless steel raj, cais raws li cov pa roj carbon steel boiler raj raws li American ASTM tus qauv, yog ib qho tseem ceeb tivthaiv nyob rau hauv kev lag luam daim ntaub ntawv uas muaj siab - kub thiab siab - siab ib puag ncig xws li boilers, superheaters, thiab tshav kub exchangers. Nws cov tshuaj muaj pes tsawg leeg yog tswj tau meej, nrog cov ntsiab lus carbon khaws cia ntawm 0.06% thiab 0.18%, nrog rau kev tswj hwm qib ntawm manganese, phosphorus, thiab sulfur. Cov qauv no ua kom muaj kev ruaj ntseg tshwj xeeb hauv kev ua haujlwm hauv qab 480 degree.
Piv nrog rau cov pa 20 # steel tubes, SA192 nthuav tawm qhov tsawg kawg nkaus lub zog ntawm 180 MPa thiab lub zog tensile ntawm kwv yees li 325 MPa, ua rau nws tshwj xeeb tshaj yog haum rau ntev -kev pab cuam nyob rau hauv nruab nrab- thiab qis - siab chav ib puag ncig.
Cov khoom siv qhov zoo tseem ceeb yog tshwm sim hauv peb yam:
Grain refinement technologyenables superior creep kuj ntawm elevated kub.
normalizing kev kho mobua rau muaj kev sib faib ntawm pearlite hauv microstructure, ua kom muaj zog tiv thaiv.
Kev tswj nruj ntawm cov ntsiab lus ntawm sulfur thiab phosphorus(txhua qhov tsawg dua lossis sib npaug li 0.025%) ua haujlwm zoo txo qhov kev pheej hmoo ntawm intergranular corrosion nyob rau hauv siab - qhov kub thiab txias.
Hauv kev siv cov tswv yim, SA192 cov raj ua kom pom qhov kev pab cuam lub neej txuas ntxiv ntawm ntau dua 30% piv rau cov khoom zoo sib xws thaum ua haujlwm hauv qhov kub ntawm 300-400 degree.
Nyob rau hauv cov nqe lus ntawm daim ntawv thov, SA192 seamless hlab yog feem ntau siv nyob rau hauv lub zog thiab lub zog tsim sector. Nyob rau hauv supercritical thiab ultra-supercritical fais fab nroj tsuag boilers, lawv feem ntau yog ua hauj lwm los fabricate raj bundles rau siab -kub superheaters thiab reheaters, ua hauj lwm ntawm qhov kub thiab txias feem ntau li ntawm 450℃mus rau 550℃thiab siab tshaj 25 MPa.
SA179 boiler raj, ua cov khoom tseem ceeb hauv kev lag luam, ua lub luag haujlwm tseem ceeb hauv boilers, kub exchangers, thiab lwm yam siab - kub thiab siab - khoom siv siab. Lawv zoo heev -kub thiab siab -siab tsis kam ua rau lawv nyiam cov khoom siv yeeb nkab hauv lub zog, petrochemical, thiab tshuaj lom neeg kev lag luam.
Cov yam ntxwv thiab qhov zoo ntawm SA179 Kub-Rolled Seamless Pipes: SA179 kub- dov seamless steel kav yog qis- carbon steel kav, ua raws li tus qauv ASTM A179, thiab lawv cov khoom tseem ceeb yog carbon, silicon, manganese, thiab lwm yam.
Nws cov yam ntxwv tseem ceeb suav nrog:
1. Zoo heev -kub tsis kam: Nws tuaj yeem ua haujlwm tsis tu ncua hauv qab 450 degree, nrog luv -lub sijhawm ua haujlwm kub txog 480℃.
2. Zoo thermal conductivity: Thermal conductivity tshaj 45 W / (m·K), ua rau nws tshwj xeeb tshaj yog haum rau kev siv tshav kub exchanger.
3. Kev tiv thaiv corrosion zoo heev: Tom qab kev kho tshwj xeeb, nws tuaj yeem tiv thaiv corrosion los ntawm ntau yam xov xwm.
4. Lub zog siab thiab zoo plasticity: Tensile zog Ntau dua lossis sib npaug ntawm 325 MPa, elongation Ntau dua lossis sib npaug li 35%.
5. Precise dimensional control: Outer diameter kam rau ua ± 0.10 hli, phab ntsa thickness kam rau ua ± 10%.
Piv nrog rau cov kav dej welded, cov kav dej seamless muab kev ruaj ntseg zoo dua nyob rau hauv siab - kub thiab siab - qhov chaw siab, uas yog lub ntsiab yog vim li cas SA179 kub - dov seamless kav yog siv dav hauv cov khoom siv tseem ceeb.
A179 kub- dov seamless steel raj feem ntau yog siv hauv qab noteb:
1. Fais fab nroj tsuag boilers: siv los ua cov khoom tseem ceeb xws li superheaters, reheaters, thiab economizers.
2. Petrochemical kev lag luam: siv nyob rau hauv cov cuab yeej xws li tshav kub exchangers, condensers, thiab evaporators.
3. Kev ua zaub mov: siv rau hauv siab - cov khoom siv kom tsis muaj menyuam.
4. Kev lag luam tshuaj: siv hauv cov kav dej huv.
5. Shipbuilding: boilers thiab tshav kub exchange systems.
Chemical Composition Comparison (wt%)
| Element | SA192 (ASME SA-192) | SA179 (ASME SA-179) |
|---|---|---|
| Cov pa roj carbon (C) | 0.06 – 0.18 | Tsawg dua los yog sib npaug li 0.06 |
| Manganese (Mn) | 0.27 – 0.63 | 0.27 – 0.63 |
| Silicon (Si) | Tsawg dua los yog sib npaug li 0.25 | Tsawg dua los yog sib npaug li 0.25 |
| 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 |
Mechanical Properties Comparison (Room Temperature Tensile)
| Khoom | SA192 (ASME SA-192) | SA179 (ASME SA-179) |
|---|---|---|
| Tensile zog | Ntau dua lossis sib npaug li 325 MPa | Ntau dua lossis sib npaug li 325 MPa |
| Yield zog | Ntau dua lossis sib npaug li 180 MPa | Ntau dua lossis sib npaug li 180 MPa |
| Elongation | Ntau dua lossis sib npaug li 35% | Ntau dua lossis sib npaug li 35% |
Mechanical Performance Comparison (Hardness thiab lwm yam)
| Khoom | SA192 (ASME SA-192) | SA179 (ASME SA-179) |
|---|---|---|
| Rockwell Hardness (HRB) | Tsawg dua lossis sib npaug rau 77 HRB | Tsawg dua lossis sib npaug rau 72 HRB |
| Brinell Hardness (HB) | Tsawg dua lossis sib npaug li 137 HB | Tsawg dua lossis sib npaug rau 130 HB (kwv yees) |
| Impact Toughness (KV₂) | Tsis tau teev tseg | Tsis tau teev tseg |
| Kev qaug zog | Tsis tau teev tseg | Tsis tau teev tseg |