Txheej txheem cej luam
Qib ST35 yog aqis- carbon steelcov yeeb nkab feem ntau yog siv rau kev siv qis -siab. Lub "ST" sawv cev rau "Steel Tube," thiab "35" qhia tias lub zog tensile yam tsawg kawg nkaus ntawm kwv yees li 350 MPa (los yog 35 kg / mm²).
Nws yog ib qho dav dav - lub hom phiaj yeeb nkab paub txog nws qhov zoo weldability, formability, thiab nqi -effectiveness. Nws tsis yog tsim los rau siab - siab lossis siab - kev pabcuam kub.
1. Cov ntsiab lus tseem ceeb thiab cov qauv
ST35 tsis yog ib leeg ASTM tus qauv zoo li A106 lossis A53. Xwb, nws yog feem ntau txuam nrog covGerman tus qauv DIN 2440 / DIN 1626thiab feem ntau suav hais tias yog European sib npaug ntawmASTM A53 Qib Alos yogAPI 5L Qib A.
Primary Standard: TIAB SA 2440- Seamless Tubes rau Lub Hom Phiaj
Khoom siv Standard: DIN 1626, Part 1 / DIN 17100- Qhov no txhais cov tshuaj thiab cov khoom siv kho tshuab rau qib ST35.
Common Equivalents:
ASTM A53 Qib A(USA)
API 5L Qib A(Line Pipe)
EN 10255 / EN 10216-1(Tebchaws Europe Standards)
2. Tshuaj muaj pes tsawg leeg
Cov muaj pes tsawg leeg yog tus cwj pwm los ntawm cov ntsiab lus tsis tshua muaj carbon thiab alloy, ua rau nws mos thiab ductile.
| Lub ntsiab | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.17% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 0.70% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.040% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.040% |
| Silicon (Si) | Feem ntau qis, tsis yog lub ntsiab lus tseem ceeb tswj |
3. Mechanical Properties
| Khoom | Tus nqi |
|---|---|
| Tensile zog (min) | 350 MPa (los yog 35 kg / mm²) |
| Yield zog (min) | 235 MPa (los yog 24 kg / mm²) |
| Elongation (min) | Feem ntau 25% lossis ntau dua (nyob ntawm phab ntsa thickness) |
4. Cov yam ntxwv zoo
Weldability zoo heev:Vim nws cov ntsiab lus tsis tshua muaj carbon, nws tuaj yeem yooj yim welded siv txhua txoj hauv kev yam tsis muaj ua ntej - cua sov lossis tom qab -weld heat treatment (nyob rau hauv ib txwm muaj).
Zoo Ductility thiab Formability:Yooj yim khoov, flange, thiab zoo li tsis tawg.
Tus nqi qis:Ib qho ntawm cov qib qis tshaj plaws steel yeeb nkab muaj.
Tsawg Corrosion Resistance:Zoo li txhua cov pa roj carbon steel, nws yuav xeb thaum raug dej thiab huab cua. Nws feem ntau xav tau cov txheej txheem tiv thaiv (xim, galvanization) rau sab nraum zoov lossis corrosive ib puag ncig.
Tsis yog rau siab -Tsub/Ntxhais:Nws lub zog txo qis heev ntawm qhov kub thiab txias.
5. Cov ntawv thov
ST35 kav dej yog siv nyob rau hauv ntau yam ntawm tsawg- kev siv kev ntxhov siab:
Tsawg-Cov kav dej thiab cov kav dej:Rau kev thauj dej, dej phwj tuaj, thiab lwm yam uas tsis yog - cov kua dej corrosive.
Kev siv tus qauv:Raws li kev tuav tes, scaffolding, laj kab ncej, thiab cov txheej txheem thav duab uas muaj lub zog siab tsis tseem ceeb.
HVAC Systems:Rau ductwork, cua tuav chav tsev, thiab qis - cua sov tshuab.
Automotive Exhaust Systems:(feem ntau nyob rau hauv daim ntawv coated los tiv thaiv corrosion).
General Engineering thiab Machinery:Rau cov kua hluav taws xob lub tog raj kheej, cov kab cua compressed, thiab cov tshuab hydraulic ntawm qhov siab qis mus rau nruab nrab.
Kev siv rooj tog thiab kho kom zoo nkauj:Rau cov rooj, rooj zaum, thiab cov khoom muag muag.
6. ST35 vs. Lwm Cov Qib Siab
| Feature | TSI 35 | ASTM A53 Qib B | ASTM A106 Qib B |
|---|---|---|---|
| Tensile zog | 350 MPa (min) | 415 MPa (min) | 415 MPa (min) |
| Yield zog | 235 MPa (min) | 240 MPa (min) | 240 MPa (min) |
| Cov ntsiab lus carbon | ~ 0.17% (max) | 0.30% (max) | 0.30% (max) |
| Kev siv thawj zaug | Lub hom phiaj dav dav, Tsis tshua muaj siab | Lub hom phiaj dav dav, siab dua | High-Tsev Kev Pabcuam |
| Qhov txawv tseem ceeb | Tsawg zog, feem ntau ductile | Muaj zog dua ST35/A53A | Ua rau kub kub (piv txwv li, chav dej) |
Key Takeaway:ST35 yog qhov "basic" lossis "me me steel" xaiv. Yog tias koj xav tau lub zog siab dua lossis kev pabcuam ntawm qhov kub siab, cov qib xws li A53 B lossis A106 B yuav tsum tau ua.
7. Kev txiav txim siab tseem ceeb thaum xaj lossis siv ST35
Seamless vs. Welded:ST35 muaj nyob rau hauv ob qho tib si seamless (DIN 2440) thiab welded (DIN 2441) daim ntawv. Lub seamless version yog zoo ib yam thiab muaj peev xwm tswj tau me ntsis siab dua.
Nto tiav:Nws tuaj yeem yog dub ( zeb tiav), galvanized (zinc{0}}coated rau corrosion kuj), los yog pleev xim rau.
Ntawv pov thawj:Rau cov ntawv thov tseem ceeb, xyuas kom tus neeg muag khoom muab aDaim ntawv pov thawj zeb xeem (MTC)los yog3.1 cov ntaub ntawv pov thawjtxhawm rau txheeb xyuas cov yeeb nkab ua tau raws li qhov yuav tsum tau muaj tshuaj lom neeg thiab cov khoom siv kho tshuab.
Corrosion:Ib txwm suav rau corrosion. Nyob rau hauv ib puag ncig uas muaj dej los yog tshuaj, galvanized ST35 lossis lwm yam khoom siv (xws li stainless hlau) yuav tsum tau txiav txim siab.
Hauv cov ntsiab lus,Qib ST35 Carbon Steel Yeeb Nkab yog ntau yam, kev lag luam, thiab yooj yim - rau- ua haujlwm - nrog rau cov khoom siv zoo rau ntau yam tsawg - kev ntxhov siab ntawm cov qauv thiab cov dej xa tawm.Nws cov kev txwv yog nws lub zog thiab corrosion kuj, uas yuav tsum tau txiav txim siab thaum lub sij hawm tsim thiab xaiv cov khoom.
