File:Spark testing 1.png

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Summary

Description
English: Diagram of sparks for spark testing various types of steel. Key:

(A) High-carbon steel

(B) Manganese steel

(C) Tungsten steel

(D) Molybdenum steel
Date
Source Oberg, Erik; Jones, Franklin Day (1918), Iron and Steel (1st ed.), The Industrial Press.
Author Wizard191
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15 May 2009

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Date/TimeThumbnailDimensionsUserComment
current22:40, 15 May 2009Thumbnail for version as of 22:40, 15 May 2009630 × 406 (156 KB)Wizard191{{Information |Description={{en|1=Diagram of sparks for spark testing various types of steel. Key: (A) High-carbon steel (B) Manganese steel (C) Tungsten steel (D) Molybdenum steel}} |Source=Oberg, Erik; Jones, Franklin Day (1918), [http://books.google.c
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