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Title: Alloy 400 tube failures by stress corrosion cracking

Abstract

A feedwater heater with SB163 Alloy 400 (cold drawn - stress relieved) tubing experienced numerous tube failures and was replaced after of 4.5 years. Failures were attributed to Inter Granular Stress Corrosion Cracking (IGSCC) in the roll transition area. An eddy current test method was developed with EPRI NDE Center technical support to detect the cracks in the tubesheet region. Three tubes were pulled for metallurgical examination. Short axial cracks were found on tube inner surface. Measured crack depths were correlated with the eddy current indications. A large number of tubes were plugged. However, the heater continued to deteriorate rapidly. Potential contributors to IGSCC are discussed.

Authors:
 [1]
  1. Consolidated Edison Company of New York, Inc., NY (United States)
Publication Date:
Research Org.:
Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
OSTI Identifier:
227013
Report Number(s):
EPRI-TR-105876; CONF-9509192-
TRN: 96:001699-0015
Resource Type:
Technical Report
Resource Relation:
Conference: EPRI feedwater heater technology symposium, Kansas City, MO (United States), 25-26 Sep 1995; Other Information: PBD: Dec 1995; Related Information: Is Part Of Proceedings: 1995 Feedwater heater technology symposium; PB: 270 p.
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 36 MATERIALS SCIENCE; FEEDWATER HEATERS; TUBES; FAILURES; STRESS CORROSION; INTERGRANULAR CORROSION; MONEL

Citation Formats

Amar, A S. Alloy 400 tube failures by stress corrosion cracking. United States: N. p., 1995. Web.
Amar, A S. Alloy 400 tube failures by stress corrosion cracking. United States.
Amar, A S. 1995. "Alloy 400 tube failures by stress corrosion cracking". United States.
@article{osti_227013,
title = {Alloy 400 tube failures by stress corrosion cracking},
author = {Amar, A S},
abstractNote = {A feedwater heater with SB163 Alloy 400 (cold drawn - stress relieved) tubing experienced numerous tube failures and was replaced after of 4.5 years. Failures were attributed to Inter Granular Stress Corrosion Cracking (IGSCC) in the roll transition area. An eddy current test method was developed with EPRI NDE Center technical support to detect the cracks in the tubesheet region. Three tubes were pulled for metallurgical examination. Short axial cracks were found on tube inner surface. Measured crack depths were correlated with the eddy current indications. A large number of tubes were plugged. However, the heater continued to deteriorate rapidly. Potential contributors to IGSCC are discussed.},
doi = {},
url = {https://www.osti.gov/biblio/227013}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 1995},
month = {Fri Dec 01 00:00:00 EST 1995}
}

Technical Report:
Other availability
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