(a) CHEMICAL COMPOSITION: The chemical composition of the grinding media will be as per IS 6079-1980: as follows:

	GRADE-1 (For size 60 mm & above)	GRADE-2 (For size below 60 mm)
Carbon	1.10-1.60	1.50-2.00
Silicon	1.00 Max.	1.00 Max.
Manganese	0.90-1.60	0.90-1.60
Chromium	1.20-2.40	1.20-2.40
Sulphur	0.06 Max.	0.06 Max.
Phosphorous	0.06 Max.	0.06 Max.

(b) HARDNESS: When tested in accordance with IS 1500/1983 the hardness at any point across the section of the ball is more than 375 BHN.

(c) MICROSTRUCTURE: Microstructure shall be free from continuous carbide network.

(d) HEAT TREATMENT: The grinding media is suitably heat treated to obtain the required hardness and Microstructure.

(e) STANDARD SIZE OF GRINDING MEDIA:
Balls diameter (mm) - 125, 100, 90, 80, 75, 70, 65, 60, 50, 40, 30, 25, 20 & 17
Cylpebs (mm) - 25x25, 22x22, 19x19
OTHER TECHNICAL SPECIFICATIONS WILL CONFIRM TO IS 6079-1980

(f) TOLERANCE ON SIZE: Variation on size shall not exceed the following limits:-

SHAPE AND SIZE	TOLERANCE (mm)
(1) Balls for sizes 60 mm & above	+/- 3.00
(2) Balls for sizes 50 mm & below	+/- 2.50
(3)Cylpebs for all sizes	+/- 1.50

Hyper steel Grinding Media Balls and Cylpebs as per IS 6079-1989

(a) CHEMICAL COMPOSITION: The chemical composition of the grinding media will be as per IS 6079-1989: as follows:

	GRADE-1 (For size 60 mm & above)	GRADE-2 (For size below 60 mm)
Carbon	1.25-1.50	1.60-1.90
Silicon	1.00 Max.	1.00 Max.
Manganese	1.20-1.50	1.20-1.50
Chromium	1.50-2.00	1.50-2.00
Sulphur	0.06 Max.	0.06 Max.
Phosphorous	0.06 Max.	0.06 Max.

(b) HARDNESS: When tested in accordance with IS 1500/1983 the hardness at any point across the section of the ball is more than 375 BHN.

SHAPE AND SIZE	TOLERANCE (mm)
(1)Balls for sizes 60 mm & above	+/- 2.50
(2) Balls for sizes 50 mm & below	+/- 2.00
(3) Balls for sizes 25 mm to15mm & Cylpebs for all sizes	+/- 1.50

SBMI was established during 2017 for manufacturing of Wear Resistant Castings. Our integrated unit has latest globally accepted modern state of art technology for manufacturing of such castings. We have a team of sincerely dedicated skilled professionals for providing most economical grinding solutions to user industry. We are a leading composite solution provider for Grinding Media and Mill Internals.

We are an ISO: 9001-2008 approved company and are offering following services to cement, minerals, fertilizers, chemicals and thermal power sectors of the country and abroad.

Mill Internals: Complete designing and manufacturing of mill liners, flow control and other type of diaphragms in High Chrome as well as Mn Steel compositions and supply of Hardware items like Liner Bolts and EPDM Rubber Sheets.

We do not intend to supply these items merely on commodity basis but provide complete services required for optimizing wear economics, power consumption and performance level of the mills by giving consideration and proper weightage to important factors like Mill dimensions, Grinding Circuit, characteristics of feed material (like size, grindeability, hardness and moisture contents etc.)

Economics

• We guarantee for the following advantage from our products-
• Low Specific Energy Consumption and Wear Rate due to Guaranteed Micro-Structural Features with optimum carbide quota and high reliability against breakage.
• No chipping in the process of grinding due to perfectly sound castings poured on optimum pouring temperature. Casting yield maintained by us is approx. 10% lower compared to other products in the market. Our manufacturing cost is comparatively higher which is offset much more in terms of low wear feature.
• Completely free of all type of casting defects due to closely monitored manufacturing process.
• Full Functionality during whole lifetime retaining spherical shape for long time.
• Long maintenance free life time

Advantages Of Adopting Our High Chrome Liners And Economics

Users are normally mentioning only chemical composition and hardness of High Chrome Liners in their enquiry which is not sufficient for assessing/ comparing quality level of these items from different manufacturers. The metallurgy involved in High Chrome Alloys is highly complex and also the manufacturing technology adopted by different manufacturers which necessitates full understanding of alloy characteristics and production technologies for developing full confidence in the manufacturer and the product. It is an established fact that Mertensite phase and chromium carbides have maximum wear/ abrasion resistant properties and as such microstructure evaluation should be given maximum weightage at the time of comparing quality from different manufacturers. An ideal High Chrome Alloy should reflect following micro-structural characteristics.

• Proper contents of Chromium Carbides (Cr7 C3) should be at least 25-30% of volume.
• These carbides should be well disconnected and properly distributed in Martensitic Matrix which is possible only by proper balancing of chromium and carbon contents in the alloy.
• Occurrence of austenite, Pearlites and ferrites should be as low as possible which is only possible by designing proper heat treatment cycle.
• All these micro-structural features are observed on High Magnification Metallurgical Microscope and are absolutely necessary for providing proper wear resistant characteristics in high chrome alloys.
• We guarantee for the following advantage from our High Chrome Liners.
• Consistent Quality: Although all manufacturers are now equipped with spectrometer but due to constraint of time factor because of Heat cycles of 45-60 minutes, it is not practically possible to analyze chemical composition of bath samples of each heat. It is, therefore, most important to use only consistent quality of inputs. We have, therefore, restricted commercial grade of scrap in our factory and are using only selected qualities of scrap with known composition for getting consistent quality of these items well within specifications.
• Excellent Surface Finish: Unlike other manufacturers, we are using facing sand with 100% of fresh silica sand for getting good surface finish. Our fresh sand consumption is 2-3times compared to others. Perfect Sound Castings: Yield is known as ratio of net casting weight v/s gross weight e.g. if 70kg of casting is manufactured from 100 kg liquid metal poured, Yield becomes 70%. Manufacturing cost reduces with increase in yield percentage but still we are normally maintaining yield percentage of 60 – 65% for getting perfect sound castings from High Chrome Alloys.
• Properly Designed Heat Treatment Cycle: For achieving desired physical properties and microstructure level, High Chrome Casting have to pass through properly designed heat treatment cycle consisting of heating to specific temperature, soaking for certain period depending on thickness of castings and Cr percentage followed by proper air quenching and then tempering in electric furnace for relieving stresses developed during Heat treatment. Heat treatment cost can be drastically reduced if only hardness is to be provided but we are spending more on heat treatment of liners for improving micro-structural features which are necessary for achieving low wear rate.
• Low Specific Energy Consumption and Wear Rate due to Guaranteed Micro-Structural Features with optimum carbide quota and high reliability against breakage.
• Completely free from all type of casting defects due to closely monitored manufacturing process.
• Full Functionality during whole lifetime due to feature of retaining the shape for long time.

Specifications

High Chrome Grinding Liners are manufactured by us confirming to following specifications as per BS : 4844 as well as against specific requirements of customers.

Economics

• We guarantee for the following advantage from our products-
• Low Specific Energy Consumption and Wear Rate due to Guaranteed Micro-Structural Features with optimum carbide quota and high reliability against breakage.
• No chipping in the process of grinding due to perfectly sound castings poured on optimum pouring temperature. Casting yield maintained by us is approx. 10% lower compared to other products in the market. Our manufacturing cost is comparatively higher which is offset much more in terms of low wear feature.
• No chipping in the process of grinding due to perfectly sound castings poured on optimum pouring temperature. Casting yield maintained by us is approx. 10% lower compared to other products in the market. Our manufacturing cost is comparatively higher which is offset much more in terms of low wear feature.
• Completely free of all type of casting defects due to closely monitored manufacturing process.
• Full Functionality during whole lifetime retaining spherical shape for long time.
• Long maintenance free life time

Products

Different items manufactured by us in Mn Steel are listed below-,

• Liners and Diaphragms for Ball Mills including designing, manufacturing and supply.
• Jaw Plates, Side Plates etc. for Jaw Crushers.
• Hammers, Beaters & Tips etc.

Specifications

Mn. Steel Castings are manufactured by us in electric induction furnace confirming to various grades of IS:276/2000 with following specifications followed by most suitable heat treatment cycle adopted for improving wear resistivity of these castings.

Pre-dispatch Inspection

We agree for pre-dispatch inspection of material manufactured by us either by customers Inspection Officer or from any Third Party M/s. Lloyds Register, S.G.S., etc. depending on requirement of customer. In such cases necessary facilities for testing of material shall be provided by us on free of charge basis but inspection charges and other expenses of inspection agency are to be borne by the customer.

Scope Of Testing

Mn Steel Castings manufactured by us can be tested for following physical, chemical and NDT test as per customer requirement.

Sl/No	Testing Name
01	Chemical Composition
02	Hardness
03	Microstructure
04	Tensile Strength
05	Yield Strength
06	Elongation Percentage
07	Angel Of Band
08	Dye Penetration
09	Ultrasonic
10	Magnetic Particle Detection
11	Radiographic on extra cost

Supply Conditions

• Castings will be supplied in un-machined hand ground conditions or duly machined as per customer requirement.
• Castings tolerances shall be maintained as per IS: 4897 Class – 2.
• Castings shall be free from internal and external defects, like blowholes, cracks etc.
• Each casting is legibly marked for proper identification and traceability according to requirement of customer.

Test Certificate

We have all testing facilities required for physical testing and chemical analysis of these castings in our Laboratory and as per requirement of IS: 2376/1980. Routine testing is done during the process of manufacturing as well as during final inspection before delivery of materials. All consignments shall be accompanied with test certificate from our laboratory for chemical composition and physical parameters like hardness, bend angle and ultrasonic testing.

Backed by years of industry experience, we are engaged in offering a premium quality range of Hyper Duplex Steel Grinding Cylpebs.

Material	v Hyper Duplex Steel
Diameter	v 15 to 50mm
Tolerance	v +/- 1 mm
Hardness	v 45-50 HRC
Breakage Rate	v Less than 0.5 %

Hyper Duplex Steel Grinding Cylpebs in different sizes and technical specifications. These grinding medial balls.

• Balls (mm) – 125, 100, 90, 80, 75, 70, 65, 60, 50, 40, 30, 25, 20, 17, 13
• Clypeus (mm) – 25×25, 22×22, 19×19, 16×16
• Hyper steel Grinding Media Balls and Clypeus as per IS 6079-1989
• Chemical composition: The chemical composition of the grinding media will be as per IS 6079 – 1989
• Hardness: When tested in accordance with IS 15001983 the hardness at any point across the section of the ball is more than 375 BHN.
• Microstructure: Microstructure shall be free from continuous carbide network.
• Heat treatment: The grinding media is suitably heat treated to obtain the required hardness and Microstructure.
• Standard size of grinding media: Balls diameter (mm) 125, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20, Clypeus (mm) 35×35, 30×30, 25×25, 22×22, 18×18

Working conditions	Low abrasion medium impacts	Low abrasion high impact	High abrasion high impact	High abrasion low impact	High abrasion low impact	High abrasion low impact
Application	First Chamber cement & raw mill	First Chamber cement& raw mill	First Chamber cement& raw mill	Second Chamber of cement raw mill and Coal mill	Second Chamber of cement raw mill and Coal mill	Second Chamber of cement raw mill and Coal mill
Hardness(HRC)	58-62	60-64	61-65	59-64	60-65	60-65
Cr %	14-18	14-18	18-22	01/10/14	01/11/15	16-20
C %	2.0-3.0	2.0-3.0	2.5-3.5	2.5-3.5	2.0-3.0	02/03/12
Wear Resistant	Good	Good	Excellent	Excellent	Excellent	Excellent
Impact resistance	Good	Excellent	Excellent	Low	Low	Low

Variation on size shall not exceed the following limits:

Shape and Size	Tolerance (mm)
(1) Balls for sizes 60 mm & above	+/- 3.00
(2) Balls for sizes 50 mm & below	+/- 2.50
(3)Clypeus for all sizes	+/- 1.50

In order to cater the variegated demands of our clients, we are offering an excellent quality range of Forged Alloy Steel Grinding Media Balls Manufacturers in India.

We have on offer for our customers a vast range of Forged Alloy Steel Grinding Media Balls in various sizes and technical specifications. Steel, carbon, manganese, phosphorus, silicon, sulfur, chromium and others are utilized in the manufacturing process of these types of grinding media balls. Extensively utilized in grinding and milling applications, these products have helped us garner a rich clientele in the market.

Material	v Forged Alloy Steel
Diameter	v 40mm to 150 mm
Tolerance	v +/- 2mm
Hardness	v 45-65 HRC
Breakage Rate	v Less than 1 %

In order to cater the variegated demands of our clients, we are offering an excellent quality range of Forged Alloy Steel Grinding Media Balls.

Specifications:

• Balls diameter (mm): 125,100, 90, 80, 75, 70, 65, 60, 50 ,40, 30, 25 & 20
• Clypeus (mm): 25×25, 22×22, 19×19
• Balls diameter (mm): 125, 100, 90, 80, 75, 70, 65, 60, 50, 40, 30, 25, & 20
• Clypeus (mm): 25×25, 22×22, 19×19
• Forged Steel Grinding Media Balls as per IS 12658:1989

	EN -44	EN -31
Carbon	0.90 – 1.20 %	0.95 -1.10 %
Manganese	0.45 -0.70 %	0.25 – 0.45 %
Silicon	0.30 % Max	0.10 – 0.35 %
Sulphur	0.06 % Max	0.035 % max
Phosphorous	0.06 % max	0.035 % Max
Chromium		1.40 – 1.60 %

Tolerance on size: Variation on size shall not exceed the following limits:

Shape and size	Tolerance (mm)
(1) Balls for sizes 50 mm & above	+/- 3.00
(2) Balls for sizes 50 mm & below	+/- 2.50
(3) Clypeus for all sizes	+/- 1.50

Forged Alloy Steel Grinding Media Balls Manufacturers in India

Forged Alloy Steel Grinding Media Balls in different sizes and technical specifications. These grinding medial balls c

• Balls (mm) – 125, 100, 90, 80, 75, 70, 65, 60, 50, 40, 30, 25, 20, 17, 13
• Clypeus (mm) – 25×25, 22×22, 19×19, 16×16

Working conditions	Low abrasion medium impacts	Low abrasion high impact	High abrasion high impact	High abrasion low impact	High abrasion low impact	High abrasion low impact
Application	First Chamber cement & raw mill	First Chamber cement& raw mill	First Chamber cement& raw mill	Second Chamber of cement raw mill and Coal mill	Second Chamber of cement raw mill and Coal mill	Second Chamber of cement raw mill and Coal mill
Hardness(HRC)	58-62	60-64	61-65	59-64	60-65	60-65
Cr %	14-18	14-18	18-22	01/10/14	01/11/15	16-20
C %	2.0-3.0	2.0-3.0	2.5-3.5	2.5-3.5	2.0-3.0	02/03/12
Wear Resistant	Good	Good	Excellent	Excellent	Excellent	Excellent
Impact resistance	Good	Excellent	Excellent	Low	Low	Low

Variation on size shall not exceed the following limits:

Shape and Size	Tolerance (mm)
(1) Balls for sizes 60 mm & above	+/- 3.00
(2) Balls for sizes 50 mm & below	+/- 2.50
(3) Clypeus for all sizes	+/- 1.50