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Collapse of U.S. 35 Highway Bridge, Point Pleasant, West Virginia, December 15, 1967 (HAR-71/01)

National Transportation Safety Board · 1970-12-16 · 202 pages · text by OCR, confidence 99%

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TABLE 5 Summary of Chemical Analysis of Eyebars Steel From Point Pleasant Bridge Laboratory Sample Identification C Mn S P Si Cu, Ni, Cr, V, Mo National Bureau of Standards C9 head of C9-C11NN-C9 0.62 0.63 0.03 0.024 0.16 0.05 C11 head of C11-C13NN-C0 0.61 0.66 0.03 0.028 0.14 0.05 C13 head of C11-C13NN-C3* 0.58 0.64 0.03 0.025 0.13 0.05 C13 head of C11-C13NS-C4 0.60 0.65 0.03 0.028 0.14 0.05 Av. 0.60 0.65 0.03 0.026 0.14 U. S. Steel C9 head of C9-C11NN-C9 0.62 0.72 0.03 0.022 0.19 0.04 C11 head of C11-C13NN-C0 0.61 0.66 0.035 0.023 0.15 (V not checked) C13 head of C11-C13NN-C3* 0.57 0.64 0.029 0.023 0.15 0.0? Av. 0.60 0.67 0.03 0.023 0.16 American Bridge Company, (Six Sample Bars, 1927) Av. 0.59 0.66 0.030 0.041 0.145 Min. 0.55 0.64 0.021 0.036 0.112 *Samples from broken head of eyebars No. 330. - 138 -

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