CH03_Steel_Talking-Points

CH03_Steel_Talking-Points - CEE 353 Civil Engineering...

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CEE 353 – Civil Engineering Materials CHAPTER 3 Steel Steel
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Chapter 3: Steel Dr. Javed Bari 2 3.0 Introduction Steel is the 3rd most used construction material after concrete and asphalt (4th if soil is 1st) must order off the shelf and adjust design to whatever is available Construction uses of steel. 3.1 Steel Production 1. Reduction of iron ore to pig iron (high carbon) 2. Refining pig iron to steel s 3. Form steel into products
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Chapter 3: Steel Dr. Javed Bari 3 3.2 Iron-Carbon Phase Diagram Steel is an alloy of iron and carbon Higher carbon: steel is harder & more brittle. Modulus of Elasticity is the same for all three h Cast iron : high (> 2%) carbon = brittle h High carbon steel : medium (0.8%~2%) carbon = brittle h Structural steel : low (0.15%~0.27%) carbon = ductile 3.3 Heat Treatment Refines grain structure, removes internal stresses, removes gases, changes electrical/magnetic properties. Types: Annealing, Normalizing, Hardening & Tempering.
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Chapter 3: Steel Dr. Javed Bari 4 (a) Annealing : heating, then slowly cooling to room temp
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This note was uploaded on 07/25/2009 for the course CEE 353 taught by Professor Bari during the Spring '09 term at Universidad Nacional de Asuncion.

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CH03_Steel_Talking-Points - CEE 353 Civil Engineering...

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