ASTM E345-93 Standard test method for Tension Testing of Metallic Foil

Scope:

This test methods cover the tension testing of metallic foil at room temperature in thicknesses less than 0.006 in. (0.150 mm).

Test Procedure:

ASTM E345-93 involves initially preparation of test specimen of Type and Type B and measuring them for Test. Specific measurement involves measuring thickness and width. Thickness of specimens taken from soft foils or from foils 0.002 in. (0.05 mm) and thinner shall be determined to an accuracy of 2 % of the thickness by weighing. And width dimension to the nearest 0.001 in. (0.025 mm). Then yield strength is measured by Offset method and Extension under load method. Then test will proceed with measuring Tensile strength, it is determined by calculating the tensile strength by dividing the maximum force carried by the specimen by the original cross-sectional area of the specimen. Then elongation is measured for type A specimen and type B specimen with different methods. Elongation should be near to 0.5 %.

Test Specimen: 

Type A Specimen—Type A specimens shall be in accordance with the 1⁄2-in. (12.5-mm) sheet-type specimen shown in Figure 1.

Type B Specimens—Type B specimens shall be in accordance with the 1⁄2-in. (12.5-mm) wide parallel sided specimen shown in Figure 1

Figure 1: Foil Tension Test Specimen

Figure 2: Double Blade cutter for making Type B Specimen

Data: 

Width can be calculated by,

Where, 

T = thickness of specimen or sample,

W = mass of specimen or sample,

A = area of specimen or sample, and

D = density of material