Superclean steel development: A guide for utility use

Technical Report · Fri Dec 01 00:00:00 EST 1989

OSTI ID:5045449

Richman, R H; McNaughton, W P ^[1]

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1. Daedalus Associates, Inc., Mountain View, CA (USA)

The Electric Power Research Institute has actively encouraged and sponsored a number of research projects to develop superclean 3. 5NiCrMoV steel for low pressure turbine rotors. Such steel is highly resistant to temper embrittlement and will thus facilitate increased efficiency in electricity generation through the use of higher operating temperatures and improvements in design. Steels with impurity contents typical of the superclean specification can be manufactured for production rotors with properties that equal or exceed those for conventional 3.5NiCrMoV rotors in every detail. Of particular interest are the results that the superclean steels appear to be virtually resistant to temper embrittlement to a temperature of 500{degree}C. The objective of this users guide is to assist US utilities with decisions about when to adopt superclean steel for new or replacement rotor forgings by providing an overview of superclean steel developments and a summary of the properties to be expected of production rotor forgings. 57 refs., 26 figs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Daedalus Associates, Inc., Mountain View, CA (USA)
• Sponsoring Organization: EPRI
• OSTI ID: 5045449
• Report Number(s): EPRI-GS-6612
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
20 FOSSIL-FUELED POWER PLANTS
CHROMIUM-NICKEL STEELS
RESEARCH PROGRAMS
AUSTENITIC STEELS
CREEP
EFFICIENCY
EMBRITTLEMENT
FATIGUE
GRAIN SIZE
IMPACT STRENGTH
MANGANESE
MECHANICAL PROPERTIES
PROGRESS REPORT
ROTORS
STRESS CORROSION
SULFUR CONTENT
TURBINES
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CRYSTAL STRUCTURE
DOCUMENT TYPES
ELEMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MACHINERY
METALS
MICROSTRUCTURE
NICKEL ALLOYS
SIZE
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS
TURBOMACHINERY
360103* - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion
360102 - Metals & Alloys- Structure & Phase Studies
200104 - Fossil-Fueled Power Plants- Components