United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9509080175

Nuclear Division of B&G Manufacturing Company, Inc.
3873 West Oquendo o Las Vegas, Nevada 89118-3098
(702) 739-1966 o Fax (702) 739-1960

August 29, 1995                                   QAM-95-065

Document Control Desk
U.S.  Nuclear Regulatory Commission
Washington, DC 20555

Reference: 10 CFR, Part 21 Notification

To Whom It May Concern:

This letter provides notification of defect to the Nuclear
Regulatory Commission as required by 10 CFR Part 21, paragraph
21.21, (4).

Cardinal Industrial Products (CIP) was informally contacted by Duquesne
Light-Beaver Valley Power Station to discuss mechanical failures that
were discovered, when they conducted supplemental testing on a Lot of
    3/8 - 24 x 2 A-193 B7 HEX CAPSCREWS identified by head markings (B7,
C, TS9, S4).  These fasteners were supplied by CIP to Duquesne Light on
purchase order D 136646.

The method of performing additional testing was discussed with Duquesne
Light and their subcontracted Testing Laboratory to assure that the
testing was performed in accordance with ASTM A-370.  It was decided that
Duquesne Light would provide CIP with a sample to be tested by CIP, with
a Duquesne representative present.

All four (4) samples supplied by Duquesne were tested at CIP, with one
(1) failure.  The failure exhibited an unusually low hardness and tensile
per the material specification.  It should be noted that ASTM A-193 B7
material does not have a hardness requirement.

CIP pulled additional product samples from stock and by conducting
hardness evaluation, identified other failures.  CIP sent one (1) sample
that passed hardness and one (1) sample that failed hardness out for
metallurgical examination by an approved testing laboratory.

The results of this examination indicated that the "Good" sample had .006
"decarburization, and a core hardness of 35 HRC, while the "Bad" sample
had no decarburization, and a core hardness of 95.5 HRB.  The low core
hardness, and more specifically, the lack of decarburization would
indicate that the "Bad" sample did not receive the full heat treatment.
The decarburization is formed, when alloy steel is heat treated in an air
atmosphere, but in order for it to form the parts must reach the
prescribed temperature.

                                                                   Page 2

CIP also performed hardness test, as means of an indicator, on ten (10)
heat lot charges that were process before and after the suspect charge
was heat treated.

Duquesne Light identified test failures with product lot (3/8 x 4 A-193
B7 lot # 12133 lot code S4).  CIP has identified, two (2) additional heat
lot charges that exhibit the same failures in hardness as the heat lot
identified by Duquesne light.  Those lots are, 3/8 x 6 A-193 B7, Lot #
12134, Lot Code S5 and 5/8 - 11 x 2 1/2, A-193 B7, Lot # 11127, Lot Code
TU 1).

Attachment 1, to this report, identifies all of the customers who have
received these suspect fasteners that could possibly create a safety
hazard.  The customer's have been notified of this defect and have been
instructed to evaluate this condition in accordance with 10 CFR Part 21
paragraph 21.21 (a) (1) (ii) and (b) (1).

CIP is in the process of conducting additional testing on all ASTM A-193,
B7 inventory that was heat treated at CIP.  A hold has been placed on our
A-193 B7 inventory to prevent distribution until completion of our
evaluation.  The above defective heat lots have been nonconformanced and
placed in our bonded nonconformance area.  Additionally, our heat
treatment facility has been closed pending further investigation.

CIP will provide a complete investigation report to the NRC within sixty
(60) days as required by 10 CFR Part 21.

Should you have any questions, concerning this issue, please contact me
at (702) 739-1966.


David Z. Hathcock
Quality Assurance Manager

Attachment (1)

cc: NRC file.

Attachment #1  "10 CFR PART 21 NOTIFICATION LIST," 6 Pages omitted.

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