ER309 thiab ER309L yog ob qho tib si stainless hlau vuam cov ntaub ntawv, feem ntau yog siv rau vuam sib txawv hlau (xws li koom nrog carbon steel thiab stainless hlau) los yog nyob rau hauv siab - kub thiab corrosion- daim ntaub ntawv resistant. Lawv qhov sib txawv tseem ceeb nyob hauv lawv cov ntsiab lus carbon, uas cuam tshuam ncaj qha rau lawv cov khoom siv kho tshuab thiab kev tiv thaiv corrosion.
| Element | E309 | E309L |
|---|---|---|
| Cov pa roj carbon% | 0.12 Max. | 0.03 Max. |
| Chromium % | 22- 25 | 22- 25 |
| Nickel% | 12- 14 | 12- 14 |
| Molybdenum% | 0.75 Max. | 0.75 Max. |
| Manganese% | 0.5 -2.5 | 0.5 -2.5 |
| Silicon% | Max 1.00 Nws. | Max 1.00 Nws. |
| Sulfur% | 0.03 Max. | 0.03 Max. |
| Phosphorus% | 0.04 Max. | 0.04 Max. |
| tooj liab% | 0.75 Max. | 0.75 Max. |
Raws li cov lus saum toj no, peb tuaj yeem pom lawv qhov sib txawv yooj yim:
1. Cov ntsiab lus carbon
- ER309: Cov ntsiab lus carbon tuaj yeem ncav cuag 0.12%.
- ER309L: Qhov no yog qis-carbon version ntawm ER309, nrog cov ntsiab lus carbon tsis ntau tshaj 0.03%. Qhov no yog qhov tseem ceeb tshaj qhov sib txawv ntawm ob.
2. Mechanical Properties
- Vim nws cov ntsiab lus carbon ntau dua, ER309 feem ntau muaj zog dua (tshwj xeeb tshaj yog lub zog tensile) dua li ER309L.
- ER309L txi qee lub zog los ntawm kev txo cov ntsiab lus carbon hauv kev sib pauv kom zoo dua corrosion kuj.
3. Corrosion Resistance
Cov ntsiab lus qis ntawm ER309L txo qhov kev pheej hmoo ntawm intergranular carbide nag lossis daus tom qab vuam, yog li nthuav tawm cov kev tiv thaiv zoo tshaj plaws rau intergranular corrosion, ua rau nws tshwj xeeb tshaj yog haum rau hnyav corrosive ib puag ncig.
ER309 tuaj yeem ntsib cov teeb meem cuam tshuam txog kev cuam tshuam hauv cov cheeb tsam rhiab heev.
4. Daim Ntawv Thov Scenarios
- ER309L: Feem ntau siv rau hauv daim ntawv thov uas yuav tsum tau muaj kev tiv thaiv corrosion, xws li cov cuab yeej siv tshuaj, cov khoom siv hluav taws xob nuclear, thiab cov hlab ntsha hauv phab ntsa welding.
- ER309: Vim nws lub zog siab dua, nws kuj tau nquag siv hauv siab - cov ntawv thov kub lossis cov ntawv thov uas yuav tsum muaj zog tshaj qhov kev tiv thaiv corrosion.
Yog tias koj qhov chaw ua haujlwm xav tau kev tiv thaiv corrosion siab heev, koj yuav tsum xaiv ER309L; Yog tias koj ua qhov tseem ceeb ntawm kev sib koom ua ke thiab qhov chaw corrosive yog qhov xav tau tsawg dua, ER309 kuj yog qhov kev xaiv tsim nyog.
Sib nrug los ntawm cov ntsiab lus carbon, cov ntsiab lus tseem ceeb xws li chromium thiab npib tsib xee yog qhov tseem ceeb ntawm ob qho tib si (xws li, cov ntsiab lus chromium feem ntau yog 23-25%, thiab cov ntsiab lus nickel yog 12-14%), thiab ob qho tib si ua tau raws li cov qauv xws li AWS A5.9.
