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Spark Testing

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John, here are some sources of information on spark testing:

1) "Properties and Uses of Ferrous and Nonferrous Metals" pp 91-92 by H. C. 
Kazanas, fifth printing 1994 by Prakken Publications INc Ann Arbor, MI
I got my copy from the Hobart Co. bookstore in Troy, OH.  The book also 
mentions a film "The Art of Spark Testing" available from Wyckoff Steel 
Division, Steel and bold Corporation of America, P.O. Box 1256, Pittsburgh, 
PA 15230.

2) "Welding's Engineering Data Sheets" pp 165 by Ted and Don Jeffferson, 
published 1985 by Monticello Books PO Box 771, Lake Zurich, IL 60047

I've never performed or watched a spark test, just read about it.  
Apparently a grinder is used to produce sparks which are then evaluated 
visually to determine metal type.  According to the title of the film it's 
an art - I'm interested to hear how reliable the test is.

Spence Pickett

From: "John W. Bryan" <jaybryan(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: RE: Welding Anchor Bolts

Please educate me.  What is the "spark test" to determine carbon content