GUIDE SPECIFICATION FOR Steel Industry （指导规范钢铁行业）.pdf

GUIDE SPECIFICATION FOR HIGHWAY BRIDGE FABRICATION WITH HPS 70W (HPS 485W) STEEL 2nd Edition June 2003 GUIDE SPECIFICATION FOR HIGHWAY BRIDGE FABRICATION WITH HPS 70W (HPS 485W) STEEL 2nd Edition 1. INTRODUCTION3 1.1. Fabrication With HPS4 2. BASE METAL MATERIAL PROPERTIES 4 2.1. Weathering4 2.2. Mechanical Properties5 2.3. Weldability5 3. WELDING 6 3.1. Preheat and Interpass Temperature7 3.2. Consumables For Matching Strength Welds 7 3.2.1. Submerged Arc Welding (SAW)7 3.2.2. Flux Cored Arc Welding (FCAW) 8 3.2.3. Gas Metal Arc Welding (GMAW) 8 3.2.4. Shielded Metal Arc Welding (SMAW) 8 3.2.5. Welding For Hybrid Designs9 3.2.6. Qualification Test Requirements 9 3.3. Consumables for Undermatched Weld Strength9 3.4. Fillet Weld Applications10 3.5. Heat Input10 3.6. Heating For Curving, Cambering or Straightening10 3.7. Backing 10 4. FABRICATION EXPERIENCES AND TECHNIQUES 11 5. REPAIRS 12 6. COST-EFFECTIVE HPS BRIDGES12 6.1. Hybrid Designs 12 6.2. Plate Sizes 13 6.3. Butt Splices 13 6.4. Fillet Weld Sizes13 6.5. Superstructure Replacement 13 Table 1. Chemical Composition14 Table 2 Mechanical Properties14 Table 3. Minimum Preheat and Interpass Temperature for HPS 70W (HPS 485W) 15 Figure 1. The Graville Welding Diagram 15 Appendix A Special Provisions: Fabrication with HPS 70W (HPS 485W) Steel16 Appendix B Additional References19