Table 1 Properties of Common Structural Materials

Properties of Metals DOE-HDBK-1017/1-93 YOUNG'S MODULUS We can now see that Young's Modulus may be easily calculated, provided that the stress and corresponding unit elongation or strain have been determined by a tensile test as described previously. Strain (e) is a number representing a ratio of two lengths; therefore, we can conclude that the Young's Modulus is measured in the same units as stress (s), that is, in pounds per square inch. Table 1 gives average values of the Modulus E for several metals used in DOE facilities construction. Yield strength and ultimate strength will be discussed in more detail in the next chapter. E (psi) Yield Strength (psi) Ultimate Strength (psi) Aluminum 1.0 x 10⁷ 3.5 x 10⁴ to 4.5 x 10⁴ 5.4 x 10⁴ to 6.5 x 10⁴ Stainless Steel 2.9 x 10⁷ 4.0 x 10⁴ to 5.0 x 10⁴ 7.8 x 10⁴ to 10 x 10⁴ Carbon Steel 3.0 x 10⁷ 3.0 x 10⁴ to 4.0 x 10⁴ 5.5 x 10⁴ to 6.5 x 10⁴ Example: What is the elongation of 200 in. of aluminum wire with a 0.01 square in. area if it supports a weight of 100 lb? Solution: d = (2-8) P AE = (100 lb) (200 in.) (0.01 in.²) (1.0 x 10⁷ lb/in.²) d = 0.2 in. Rev. 0 Page 13 MS-02