Cast Steel Grit Steel Shot & Grit-JUN DA

Cast Steel Grit

Steel Grit is made by crushing steel shot to angular particle subsequently tempered to different hardness to cater for different application, screened by size according to SAE Standard specification. 　

SAE	Application
G-12 G-14 G-16	Blasting/descaling medium-to-large cast steel, cast iron, forged pieces,steel plate and rubber adhered work pieces.
G-18 G-25 G-40	Cutting/grinding stone; Blasting rubber adhered work pieces; Descaling steel plate, container, ship hall before painting; Cleaning small-to-medium cast steel, cast iron, forged pieces, etc.
G-50 G-80 G-120	Blasting/descaling steel wire, spanner, steel pipe before painting process; Cleaning precision castings (eg. golf blocks)

Steel grit Cleaning
Steel shot and grit are used in cleaning applications for removal of loose material on metal surfaces. This type of cleaning is common in automotive industry (motor blocks, cylinder heads, etc.).
Steel grit Surface preparation
Surface preparation is as a series of operations including cleaning and physical modification of a surface. Steel shot and grit are used in surface preparation process for cleaning metal surfaces which are covered with mill scale, dirt, rust, or paint coatings and for physically modifying the metal surface such as creating roughness for better application of paint and coating. The steel shots are generally employed in shot blasting machines.
Steel grit Stone cutting
Steel grit is used in cutting hard stones, such as granite. The grit is used in large multi-blade frames which cut the blocks of granite into thin slices.
Steel grit Shot peening
Shot peening is the repeated striking of a metal surface by hard shot particles. These multiple impacts produce a deformation on the metal surface but also improve the durability of the metal part. The media used in this application is spherical rather than angular. The reason is that spherical shots are more resistant to the fracture which happens due to the striking impact.

Product Detail

Products		Steel Grit
Chemical Composition%	CR	1.0-1.5%
	C	0.8-1.20%
	Si	0.4-1.2%
	Mn	0.6-1.2%
	S	≤0.05%
	P	≤0.05%
Hardness	steel shot	GP 41-50HRC;GL 50-55HRC;GH 63-68HRC
Density	steel shot	7.6g/cm3
Micro structure		Martensite structure
Appearance		Spherical Hollow particles<5% Crack particle<3%
Type		G120,G80,G50,G40,G25,G18,G16,G14,G12,G10
Diameter		0.2mm,0.3mm,0.5mm,0.7mm,1.0mm，1.2mm,1.4mm，1.6mm,2.0mm,2.5mm
Application		1.Granite cutting 2.Blast cleaning: Used for blast cleaning of casting, die-casting,forging; sand removal of casting, steel plate, H type steel, steel structure. 3..Rust removal: Rust removal of casting, forging, steel plate, H type steel,steel structure. 4.Shot peening: Shot peening of gear, heat treated parts. 5.Shot blasting: Shot blasting of profile steel, ship board, steel board, steel material,steel structure.

Size Distribution Of Steel Grit

SIZE DISTRIBUTION OF STEEL GRIT
Screen No.	In	Screen size	SAE J444 Standard Steel grit
Screen No.	In	Screen size	G10	G12	G14	G16	G18	G25	G40	G50	G80	G120
6	0.132	3.35
7	0.111	2.8	All Pass
8	0.0937	2.36		All Pass
10	0.0787	2	80%		All Pass
12	0.0661	1.7	90%	80%		All Pass
14	0.0555	1.4		90%	80%		All Pass
16	0.0469	1.18			90%	75%		All Pass
18	0.0394	1				85%	75%		All Pass
20	0.0331	0.85
25	0.028	0.71					85%	70%		All Pass
30	0.023	0.6
35	0.0197	0.5
40	0.0165	0.425						80%	70%min		All Pass
45	0.0138	0.355
50	0.0117	0.3							80%min	65%min		All Pass
80	0.007	0.18								75%min	65%min
120	0.0049	0.125									75%min	65%min
200	0.0029	0.075										70%min
GB			2.5	2	1.7	1.4	1.2	1	0.7	0.4	0.3	0.2