Modified 9Cr-1Mo steel for advanced steam generator applications

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5765023

Brinkman, C R; Alexander, D J; Maziasa, P J ^[1]

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1. Oak Ridge National Lab., TN (USA)

Results are reported from several types of mechanical property tests conducted on a number of commercial heats of modified 9Cr-1Mo steel. Data from long term creep-rupture tests conducted on base and weldment material were compared with an analytical model which has been shown to give good agreement between measured and predicted values. Weldment material had somewhat inferior creep-rupture strength in comparison to base material due to a soft zone at the edge of the HAZ. Data are presented from elevated temperature tensile and creep-rupture tests conducted on material thermally aged for periods of up to 75,000 h (8.6 years). Some reduction in strength was shown to occur in comparison to unaged material. Models were developed for predicting the reduction in short term elevated temperature tensile and yield strength for material thermally aged in the temperature range of 482 to 704{degrees}C. Results from Charpy impact tests conducted on material thermally aged at 538{degrees}C for periods of up to 75,000 h show an increase in the ductile-brittle transition temperature.

• OSTI ID: 5765023
• Report Number(s): CONF-901034--
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
BOILERS
CHROMIUM-MOLYBDENUM STEELS
CREEP
DUCTILE-BRITTLE TRANSITIONS
MATERIALS TESTING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICAL TESTS
STEAM GENERATORS
TEMPERATURE EFFECTS
TENSILE PROPERTIES
TESTING
VAPOR GENERATORS
YIELD STRENGTH