Standard Pieces for Spark Test
The grinder sparks of steel materials vary considerably and subtly according to the contents of carbon or other alloy ingredients of a material.
This set of standard pieses for spark tests contains standard samples of representative 45 JIS steel types classified into three groups, and is useful for identifying the steel types of unknown test pieces and for educational purposes.
F : Carbon steel [15 pcs]
G : Alloy tool steel/High speed steel [15 pcs]
H : Structural alloy steel/Steel for special use [15 pcs]
K : Educational Applications [15 pcs]
CatalogDownload (PDF 0.5MB)
Sample Movies (YouTube)
High resolution 4K movie of steel spark test (1/2x slow shooting)
Group K [Educational Applications <15 pcs>]
Group F [Carbon steel <15 pcs>]
Depending on the direction in which the standard piece is pressed against the grinder, the characteristics of the sparks may change.The movie shows a mixture of spark characteristics of the outer (carburized part) and core (original S10C).
Group G [Alloy tool steel/High speed steel <15 pcs>]
Group H [Structural alloy steel/Steel for special use <15 pcs>]
★You can view the video in the highest possible quality by selecting "Settings" => "Quality" => "2160p 4K" from the official Youtube page.
*The quality you can select may vary depending on the environment of the viewer's browser.