Effect of tempering on the strength and toughness of 2 1/4 Cr-1 Mo steel weldments
Hardness, tensile, and Charpy V-notch impact tests were performed on samples prepared from submerged-arc weldments of 2 1/4 Cr-1 Mo steel. The intent was to explore the effect of tempering on the strength and ductility of the alloy in order to assess the potential for developing a high-strength alloy for gasifier pressure vessel service to 300/sup 0/C. Results indicated that good weld metal strength and toughness could be achieved. Limited work on the heat-affected zone of the base metal did not reveal any major problems. We concluded that qualification of a quenched-and-tempered version of 2 1/4 Cr-1 Mo steel with ultimate strength in the range 620 to 758 MPa (90 to 110 ksi) will be difficult for welded gasifier pressure vessels because of a narrow time-temperature tempering window. A minimum ultimate strength requirement of 585 MPa (85 ksi), however, would be much easier to achieve because of the larger window.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6215438
- Report Number(s):
- ORNL/TM-9307; ON: DE85003818
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHROMIUM-MOLYBDENUM STEELS
SUBMERGED ARC WELDING
TEMPERING
GASIFICATION
PRESSURE VESSELS
CHARPY TEST
HARDNESS
HEAT AFFECTED ZONE
TENSILE PROPERTIES
WELDED JOINTS
ALLOYS
ARC WELDING
CHROMIUM ALLOYS
CHROMIUM STEELS
CONTAINERS
DESTRUCTIVE TESTING
FABRICATION
HEAT TREATMENTS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
STEELS
TESTING
THERMOCHEMICAL PROCESSES
WELDING
ZONES
360103* - Metals & Alloys- Mechanical Properties