HSS Spark Test

2005 Granart Road, Sugar Grove, IL 60554   630-964-5030                                               

Inquires: mtri@speakeasy.net

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photo high speed steel scrap spark test for hss M1
photo high speed steel scrap spark test for hss M2
photo high speed steel scrap spark test for hss M42
photo high speed steel scrap spark test for hss T15

fewer sparks

red sparks (orange)

material feels “heavy” (dense)

more sparks

white sparks (yellow)

material feels “light”

$$$

Uncoated tungsten carbide, has a rockwell hardness of 88 to 90 and

a specific gravity of 16. (The specific gravity of lead is 11, gold 19, and water 1.)


High speed steel has a density of around 8, so it is just about half as heavy as carbide.


If your scrap tool steel sparks red, is usually worth shipping to us.


If it sparks white, it is not.

¢¢

photo carbon steel spark test

Not worth shipping; sell locally

Carbide

Red, very short, 2” spark

For further info see Wikipedia HSShttp://en.wikipedia.org/wiki/High_speed_steelhttp://en.wikipedia.org/w/index.php?title=High_speed_steel&oldid=204962032shapeimage_9_link_0

HSS M1

Wide red sparks, no forks

HSS M2

Narrow red sparks, no forks

Narrow red sparks with forks

HSS T15

HSS M42

Wide red sparks with forks

“Iron”

Lots of white sparks; “soft material”