Mild Steel Lab Report

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The mechanical properties of materials are the features that determine how materials will behave when forces are applied to them. Examples of properties that are important in structures are elasticity, yield point, plasticity, ductility, toughness, fracture and ultimate strength. This explanation will measure some of these properties for mild steel, a basic structural material.

To determine the mechanical properties of mild steel, which is Modulus of Elasticity (E), stress, strain, strength/toughness of the mild steel, reduction lever.

Denison universal testing machine, extensometer, measuring calipers, mild steel, paper, pen.

1. The necessary part (A, B, C, D) of the mild
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To find a more accurate E in the report, we should draw a steeper slanting line when we are about to draw a tangent line on the graph in order to find the Modulus of Elasticity. The Modulus of Elasticity is important for this lab test because it is used to determine how much can the mild steel to withstand the load applied before it yield and break.
From my data report, the mild steel has elongated about 20mm. I found that when I calculate the extension of the mild steel, it exceeded more than 20mm which is inaccurate. This is because I find the wrong point of stress and strain and influences the data of extension. In details, I shouldn’t find the points in the strain which are more than 0.4mm/mm, because the mild steel was broke when the strain after 0.4mm/mm, no elongation occurs and therefore, no extension occurs.
Other than that, at the beginning of the lab test, we did not measure the mild steel accurately. If we are able to measure it precisely, the break of the mild steel will be horizontally straight. Furthermore, the mild steel is manufactured by machine and we cannot account that each and every mild steel have the same length and mass. So, there is always consist of systematic error and not able to find a perfect measurement for the mild

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