SURFACE FINISHING EQUIPMENT COMPANYSURFACE FINISHING EQUIPMENT COMPANY

E-mail- sfecjodhpur@gmail.com, surfacefinishing@yahoo.com, Website - www.sfecindia.net

E-100, M.I.A, PHASE-II BASNI, JODHPUR-342005(RAJ.) INDIA

TEL- +91-291-2740128, 3296344, 5120021

Mobile - +91-9829022624 Mr.Chintan Modi, FAX- +91-291-2740259

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S780 2

S660 1.7

S550 1.4

S460 1.2

S390 1.0

S330 0.8

S280 0.7

S230 0.6

S170 0.4

S110 0.3

S70 0.2

SAEsizeNo. size

mm

Screensize No. 7 8 10 12 14 16 18 20 25 30 35 40 45 50 80 120200 IS 4606

-SS-

2000

1700

1400

1180

1000

850

600

425

710

2.80 2.36 2.00 1.70 1.40 1.18 1.00 0.85 0.71 0.60 0.50 0.425 0.355 0.30 0.180 0.125 0.075

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85%min

85%min

85%min

85%min

85%min

85%min

85%min

85%min

85%min

80%min

80%min

97%min

97%min

97%min

96%min

96%min

96%min

96%min

97%min

97%min

90%min

90%min

5%max

5%max

5%max

5%max

10%max

10%max

10%max

10%max

STEEL SHOT:

steel shots are spherical in shape,which are produced by the atomizationof molten steel, followed by a series of thermal and mechanical treatmentsin order to attain martensite microstructure. steel shots are widely usedas a media for descaling steel components prior to coating. in this application the media is used almost excluisvely in centrifugal wheel airlessblasting equipment.it is also used in the foundry casting industry to remove sand from castings after removal from the mould and also for shotpeening operations on metal components which are exposed to severestrss in automobil and construction machinery industries

STEEL SHOT STEEL SHOTPDF Compressor Pro

S H O T G R I T

S780

S660

S550

S460

S390

S330

S280

S230

S170

S110

G12

G14

G16

G18

G25

G40

G50

G80

G120

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S T E E L GRIT S T E E L GRITscreensize No. 7 8 10 12 14 16 18 20 25 30 35 40 45 50 80 120 200

SAEsize No.

size mm

2.80 2.36 2.00 1.70 1.40 1.18 1.00 0.85 0.71 0.60 0.50 0.425 0.355 0.300 0.180 0.125 0.075

G12 1.7

G14 1.4

G16 1.2

G18 1.0

G25 0.7

G40 0.4

G50 0.3

G80 0.2

G120 0.1

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AP

AP

AP

AP

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80%min

80%min

75%min

75%min

70%min

70%min

90%min

90%min

85%min

85%min

80%min

80%min

65%min

65%min

90%min

60%min

70%min

75%min

75%min

steel grit and shot are non polluting blast media usedextensively in the blast cleaning industry to remove paint,rust, millscale and other surface contaminants from steel,concrete and other surfaces prior to coating. It is also used to remove surface contaminations from castingparts in foundry. The cost effectiveness is incomparabledue to its impact resistance qualities, durability and with utmost cleaning capacity.

STEEL GRIT:steel grit is angular in shape and is produced by crushing oversize steelshots and subsequently heat treated by tempering to get the requiredhardness and microstructure.These intrinsic characteristics of the productenormosly enhance the preparation. The angular shape and relativedeep descaling and surface preparations.The anguiar shape and relative hardness of sreel grit ensures rapid cleaning rates and excellent recyclabilty.With variations in hardness and size, steel grit can also be used for cuttinggranite and stones. The four standard hardness for high carbon cast-steel grit as follows:GS :The hardness range from 40 to 51 HRCGM :The hardness range from 47 to 56 HRCGL :The hardness range from 54 to 56 HRCGH :Minimum 60 HRC

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FEATURES : Particale Shape: Rounded abrasiv particles produce a peeened surface, whereas angular or irregular shaped abrasive particles produced an etched or angular surface profile. Selecting the right particle shape to produce the required profile and texture for the job at hand can impact productivity and performance of the coating applied.

Different metalic abrasives have different mass weights per unit volume and different impact values. for a given impact velocity and particl shape, the weight (mass) of the particle determines the shape and the depth of the profile produced. Because steel abrasives have approximately 1-1/2 to 2-1/2 times the density of nonmetallic abrasive, steel abrasives create more impact for a given particle size. Smaller steel abrasive particles will produce the same impact value as nonmatallicparticles 1-1/2 to 2 1/2 times larger. With the smalle steel abrasive there are more abrasive particles impacting the surface per unit time, which means faster cleaning rates.

Abrasive particle size influences two primary functions of blast cleaning, rate of cleaning and profile. Decreasing particle size may increase cleaning rate because more particles are impacting the surface per unit time. Increasing abrasive size may be necessary to increase profile and/ or to remove heavy coatings

it is generally believed that the harder an abrasive, the better it will perform on difficult to clean areas.

Metallic abrasives do not break down on impackt like conventional nonmetallic abrasive products. Consequently, there is considerably less dust and waste generated duringthe blasting process. Low dust levels mean better visibility, faster cleaning, increased productivity and shorter cleanups, saving time and labor and disposal costs.

Surface abrasives shot and grit products meet complete specificationof the society of automotive engineers

j-827 cast steel shot j-1993 cast steel grit j-444 cast steel shot and grit sizes

Particle Weight:

Particle Size:

Particle Hardness:

Dust Generation:

F E A T U R E S : F E A T U R E S :PDF Compressor Pro

Shape when new

Shape in the Operating mix

Steel shot Steel Grit GS Steel Grit GM Steel Grit GL Steel Grit GH

Round

Round

Angular Angular

Angular

Angular Angular

SieveAnalysis

ChenmicalComposition (%)

According to standard SAE J 444

C0.80-1.20

Si0.40-1.20

Mn0.60-1.20

S<0.05

P<0.05

Micro hardness.Tukon

392-528HVotherhardness

40-51 HRC 47-56 HRC 54-61 HRC min60HRC

392-528HV 544-613 HV 613-697HV >697HVVickers

Standard deviation

On 10 measurements taken halfway across the particle radius.Arithmetic mean of absolute values of deviations.

±3Rc

or

±40HV

±3Rc

or

±40HV

±3Rc

or

±50HV

±3Rc

or

±60HV

±3Rc

or

±80HV

MicrostructureThe microstructure of the abrasive consist of martensite, tempered to degreeconsistent with the hardness range.

Minimum density measuredby alcohol displacement

>7.0g/cm³ >7.3g/cm³

Jolly metal Abrasives:

normal 40-51 HRCotherhardness

Specification fo Abrasives

Net benefit of Surfex Media - Shots/Grits

1.Average cycle life is 2900.Local media cycle life is 2000-2100.

2.Due to more Manganese and Ferro-Chrome [60-70%]density of surfex media is 7.6 which is higher in comparison to Competition,it gives more impact energy per impact, resulting into faster cleaning effect/peening effect.

3.It requires lesser time in seasoing due to initial luster condition of Surfex shots/Grits.

4.Higher cost of Surfex media is paid of as you have to procure lesser quantity of media for given output.

5.Better quality of Surfex media, the better will be health of Machine as the media is food of machine.

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