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

- 122 - APPENDIX B U. S. STEEL LABORATORY DATA Date: December 1960 U. S. Steel Research May 21, 1960 Composition (C3) C3 is the C13 head of C11-C13MM (Bar 330) (Segment S4) C Mn P S Si Cu Ni Cr Mo V Al Total N 0.57 0.64 0.023 0.029 0.15 0.012 0.010 0.016 0.012 <0.005 0.004 0.004 0.004