Steel Grit

Steel grit is ideal for aggressive cleaning applications. Steel grit will quickly strip many types of surface contaminants from steel and other foundry metals. Steel grit is softer than aluminum oxide and does not fracture as easily making it ideal for aircraft and aero-space applications. The angular nature of steel grit produces an etched surface on metal for superior adhesion of paint, epoxy, enamel, rubber and other coatings.

Multiple chemistries of steel grit are available leading to different operating results. Steel grit that is formulated as a softer (40-50 HRC) metal will round off rapidly, making it ideal for quick stripping of oxides and cleaning of molds. Harder steel grit (55-65 HRC will maintain the angular nature of the grit to provide continuous cutting action.

Technical Details
Grit Size	Approximate Size	Finish Produced
G-120	0.005"	Light etch
G-80	0.007"	Medium etch
G-50	0.011"
G-40	0.017"
G-25	0.023"	Sharp etch
G-18	0.039"	Deep etch rough
G-16	0.046"
G-14	0.055"
G-12	0.066"	Very rough

Chemical Composition & Physical Characteristics
Carbon		0.85 - 1.20%
Manganese		0.60 - 1.20%
Silicon		0.40 - 1.20%
Sulfur		≤ 0.05%
Phosphorus		≤ 0.05%
Microstructure		Even tempered martensite
Density		≤ 7.3 g/cm3
Hardness
Grit	SG	LG	HG
HRC	40 - 50	54 - 61	> 60

Relation between grain size and roughness of workpieces
Grain Size (mm)	2.0	1.7	1.4	1.2	1.0	0.8	0.6	0.4
Roughness of workpieces	90	75	65	45	35	20	12	5

GP ARRIS STEEL GRIT

Angular when new, this grit rapidly rounds off in use and is particularly suited for decaling applications.

GL ARRIS STEEL GRIT

Although harder than GP steel grit, GL also loses its sharp edges during shot blasting and is particularly suited to decaling and surfaces preparation applications.

GH ARRIS STEEL GRIT

Having maximum hardness, GH always remains angular in its operating mix. These abrasives are particularly effective in surface treatment processes and produce a uniform, etched finish. GH angular grit should only be used in wheel machines where working requirements take precedence over cost price considerations (for example with rolling mill cylinders or when a special finish is needed). For use mainly with compressed air equipments.

Specification for Steel Grit Screenings
SAE Size	Opening		G10	G12	614	G16	G18	G25	G40	G50	G80
	mm	in
7	2.80	0.1110	All Pass
8	2.36	0.0937		All Pass
10	2.00	0.0787	80% Min		All Pass
12	1.70	0.0661	90% Min	80% Min		All Pass
14	1.40	0.0555		90% Min	80% Min		All Pass
16	1.18	0.0469			90% Min	75% Min		All Pass
18	1.00	0.0394				85% Min	75% Min		All Pass
25	0.710	0.0278					85% Min	70% Min		All Pass
40	0.425	0.0165						80% Min	70%Min		All Pass
50	0.300	0.0117							80%Min	65%Min
80	0.180	0.0070								75%Min	65%Min
120	0.125	0.0049									75%Min