Steel Shot & Grit

[vc_row][vc_column][vc_column_text]Steel Shot is manufactured by melting selected scrap in electric induction furnace.

The chemical composition of molten metal is analyzed and strictly controlled by spectrometer to obtain

SAE Standard specification. The molten metal is atomized and transformed into round particle and subsequently

quenched and tempered in a

heat treating process to obtain a product of uniform

hardness and microstructure, screened by size according to SAE Standard specification.

Specification

Chemical Composition

The finished shot shall have the chemical compositions as follows:

 

Carbon 0.85-1.20%
Silicon 0.45-1.50%
Manganese 0.35-1.20%
Phosphorus <0.05%
Sulfur <0.05%

Standard Hardness

The hardness of 90% of all shot paticles shall be within the range of 40-50 HRc. (Rockwell C)

General Appearance

The steel shot shall be as nearly spherical as commercially possible and no more 20% of the shot particles shall have objectionable defects.

Microstructure

The microstructure of steel shot shall be uniform martensite, tempered to a degree consistent with the hardness range,with fine,well distributed carbides, if any.

Density

The density of steel shot shall be not less than 7.4 g/cc.

Size Distribution (as per SAE J 827)

Mesh Sieve

Shot Number

NO. (mm.) S-780 S-660 S-550 S-460 S-390 S-330 S-280 S-230 S-170 S-110
7 2.800 All pass
8 2.360 All pass
10 2.000 85% min. All pass All pass
12 1.700 97% min. 85% min. 5% max. All pass
14 1.400 97% min. 85% min. 5% max. All pass
16 1.180 97% min. 85% min. 5% max. All pass
18 1.000 96% min. 85% min. 5% max. All pass
20 0.850 96% min. 85% min. 10% max. All pass
25 0.710 96% min. 85% min. 10% max.
30 0.600 96% min. 85% min. All pass
35 0.500 97% min. 10% max.
40 0.425 85% min.
45 0.355 97%min.
50 0.300 80%min.
80 0.180 90%min.

 

SIZE CODE

APPLICATION

S-780 SB-25

Blast cleaning of large steel & iron casting

S-660 SB-20
S-550 SB-17

Blast cleaning of large and medium steel & iron casting

S-460 SB-14
S-390 SB-12

Blast cleaning of medium and small steel & iron casting, descaling and peening of forgings and plates

S-330 SB-10
S-280 SB-8

Blast cleaning of small steel & precision casting, descaling and peening of medium thin sheets

S-230 SB-6

Blast cleaning of stainless steel, thin sheets, non-ferrous casting

S-170 SB-5
S-110 SB-3

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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.

Specification

Chemical Composition

The finished grit shall have the chemical compositions as follows:

Carbon 0.85-1.20%
Silicon 0.45-1.50%
Manganese 0.35-1.20%
Phosphorus <0.05%
Sulfur <0.05%

Standard Hardness

The steel grit is manufactured by crushing the fully hardened shot to granular grit form, screening and tempered to three different hardness range as follows :

GH

::

63-67 HRc.
GL

::

56-60 HRc.
GP

::

40-50 HRc.

Microstructure

The microstructure of steel grit shall be uniform martensite, tempered to a degree consistent with the hardness range,with fine,well distributed carbides, if any.

Density

The density of steel grit shall be not less than 7.4 g/cc.

Size Distribution (as per SAE J 827)

Mesh Sieve

Grit Number

NO. (mm.) G-10 G-12 G-14 G-16 G-18 G-25 G-40 G-50 G-80 G-120 If any
7 2.800 All pass
8 2.360 All pass
10 2.000 80% All pass
12 1.700 90% 80% All pass
14 1.400 90% 80% All pass
16 1.180 90% 75% All pass
18 1.000 85% 75% All pass
20 0.850
25 0.710 85% 70% All pass
30 0.600
35 0.500
40 0.425 85% 70% All pass
45 0.355
50 0.300 80% 65% All pass
80 0.180 75% 65%
120 0.125 75% 60%
200 0.075 70%
SIZE CODE

APPLICATION

G-12 GH-20

Blast cleaning of large medium steel & iron casting

G-14 GH-17
G-16 GH-14
G-18 GH-12

Granite cutting, Blast cleaning of casting, etching of rolls,

cleaning of structure steels

G-25 GH-10
G-40 GH-7
G-50,80,120 GH-4

GH-3

GH-2

Cleaning of non-ferrous casting and structure steels

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