Weld repair without PWHT for Cr-Mo steel

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:136786

Friedman, L M ^[1]

---

1. Edison Welding Inst., Columbus, OH (United States). Materials Section

The Edison Welding Institute and TWI of Cambridge, England have completed a group sponsored project that has been successful in demonstrating the acceptability to weld repair 1{1/4}Cr-{1/2}Mo and 2{1/4}Cr-1Mo steels without PWHT. A detailed SMAW welding procedure was developed for all welding positions that provides excellent weldment properties in the as-welded condition for both the 1{1/4}Cr-{1/2}Mo and 2{1/4}Cr-1Mo steels. This procedure is supported by detailed welding instructions for controlled deposition welding, a welder training document, and instructions for welding of the welder qualification test assembly. The program included a significant amount of mechanical property characterization and performance testing to validate the acceptability of controlled deposition, as-welded repair of the CrMo steels. Another important accomplishment of this program was the development of a set of guidelines that identifies where, when, and how to apply controlled deposition, as-welded repairs for electric utility and petroleum refinery equipment. One final and important result, partly due to this program, is that a new set of rules have been approved for the National Board Inspection Code (ANSI/NB-23) for weld repair of ferritic steel components without PWHT. This is Chapter 3, Supplement 3 in the NBIC Code, ``Welding Methods as Alternatives to Postweld Heat Treatment.``

• OSTI ID: 136786
• Report Number(s): CONF-950740--; ISBN 0-7918-1344-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
EQUIPMENT
HEAT TREATMENTS
LOW ALLOY STEELS
MATERIALS TESTING
MECHANICAL PROPERTIES
PETROLEUM INDUSTRY
POWER PLANTS
RECOMMENDATIONS
REPAIR
SHIELDED METAL-ARC WELDING
STEEL-CR2MO
USES
WELDED JOINTS