Astrra Chemicals
Astrra Chemicals
Chennai, Tamil Nadu
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Abrasives

Pioneers in the industry, we offer aluminum oxide 24 grit, micaceous iron oxide powder and emery grain from India.

Aluminum Oxide 24 Grit

Aluminum Oxide 24 Grit
  • Aluminum Oxide 24 Grit
  • Aluminum Oxide 24 Grit
  • Aluminum Oxide 24 Grit
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Approx. Price: Rs 93 / KgGet Latest Price
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Product Details:

Minimum Order Quantity100 Kg
Packaging Size25 kg/bag
BrandAstrra Chemicals
FormGRIT
FormulaAl2O3
Boiling point2,977 Deg C
Density3.95 g/cm3

We are an eminent organization, which is engaged in manufacturing, exporting and technical developers of highly pure Aluminium Oxide Brown ( Grit - 24 )

Uses and applications of Brown Aluminium Oxide (also known as Brown Fused Alumina or BFA) across various industries:

🔶 What is Brown Aluminium Oxide?

Brown Aluminium Oxide is a hard, tough, and durable abrasive material made by fusing bauxite in an electric arc furnace. It consists mainly of Aluminum Oxide (Al₂O₃) with a small percentage of Titania (TiO₂) and other impurities.

  • Hardness: ~9 on Mohs scale

  • Color: Brown

  • Melting Point: ~2,050°C

  • Typical Grit Sizes: F12 to F220 (macro), F240 to F1200 (micro)

🛠️ Primary Applications:1. Abrasives Industry
  • Grinding wheels: Used in resin-bonded and vitrified wheels for grinding hardened steel, alloy steel, and cast iron.

  • Sandpaper & abrasive cloth: Ideal for both wet and dry applications.

  • Blasting media: For surface preparation, rust removal, and finishing of metals, concrete, and composites.

  • Polishing: Suitable for rough and intermediate polishing operations.

2. Refractory Industry
  • Refractory bricks & castables: Used in linings for furnaces, kilns, and incinerators due to its high heat resistance.

  • Ceramic shapes & tiles: In applications requiring thermal stability and abrasion resistance.

3. Surface Preparation
  • Shot blasting and sandblasting: For cleaning, deburring, and roughening surfaces before coating or painting.

  • Etching & frosting of glass: Achieves decorative or functional textures.

4. Metalworking
  • Lapping & honing: In precision metal finishing.

  • Tool sharpening: Used in stones and belts for sharpening cutting tools.

5. Anti-Skid Surfaces
  • Used in floor coatingsrunways, and steps for enhancing traction and preventing slips.

6. Ceramic & Tile Industry
  • As a raw material additive to improve wear resistance and strength of ceramics.

7. Water Filtration
  • Sometimes used as a media in industrial filtration systems, especially for high-speed filtration of contaminants.

✅ Advantages of Brown Aluminium Oxide:
  • High hardness and toughness

  • Reusable in blasting applications

  • Thermally stable at high temperatures

  • Electrically non-conductive

  • Cost-effective compared to White Fused Alumina

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Additional Information:

  • Production Capacity: 5000 KGS
  • Delivery Time: 2 TO 3 DAYS
  • Packaging Details: HDPE BAGS
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Micaceous Iron Oxide Powder

Micaceous Iron Oxide Powder
  • Micaceous Iron Oxide Powder
  • Micaceous Iron Oxide Powder
  • Micaceous Iron Oxide Powder
  • Micaceous Iron Oxide Powder
  • Micaceous Iron Oxide Powder
  • Micaceous Iron Oxide Powder
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Approx. Price: Rs 38 / KgGet Latest Price
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Product Details:

Packaging Size50 Kg
Gradeindustrial grade
ColorBlack
Country of OriginMade in India

Micaceous Iron Oxide (MIO) Powder is a naturally occurring mineral form of iron oxide (Fe₂O₃) with a lamellar, flaky (mica-like) structure. It is primarily used in protective coatings and anticorrosive applications, thanks to its outstanding weather resistance, UV stability, and barrier properties.

Below is a detailed overview of uses and applications of Micaceous Iron Oxide powder across various industries:

🔍 Key Properties of Micaceous Iron Oxide (MIO)
  • Chemical Formula: Fe₂O₃ (hematite)

  • Flaky Lamellar Structure: Provides barrier effect in coatings, similar to mica or graphite.

  • High Weatherability: Resistant to UV, water, and chemicals.

  • Non-toxic and Inert: Safe for long-term use in infrastructure and marine environments.

  • Excellent Adhesion: Especially to metal surfaces.

🏗️ 1. Protective Coatings & Paints (Main Use) a. Industrial & Structural Steel Protection
  • Function: Acts as a barrier pigment in protective paints to prevent moisture and oxygen from reaching the metal surface.

  • Application Areas:

    • Bridges

    • Steel buildings

    • Oil platforms

    • Chemical plants

  • Benefit: Greatly extends the life of steel structures.

b. Marine and Offshore Applications
  • Used in marine coatings where salt spray, high humidity, and UV are concerns.

  • Marine primers and mid-coats often use MIO due to its excellent corrosion resistance.

c. Railway and Transmission Towers
  • MIO coatings protect against weathering and mechanical wear in exposed conditions.

🧱 2. Construction Industry a. Concrete Surface Coatings
  • MIO is used in coatings applied to concrete structures, especially in coastal or industrial environments.

  • Provides protection against carbonation and chloride penetration.

b. Decorative Paints (Architectural Use)
  • Adds a textured metallic look and improves durability in high-end paints for facades and monuments.

🚢 3. Pipeline and Tank Coatings
  • Coatings containing MIO are used for underground and underwater pipelines.

  • In storage tanks, especially those storing water, oil, or chemicals, MIO helps form a tough, impermeable layer.

🔧 4. OEM & Equipment Coatings
  • Heavy machinery, transformers, industrial equipment: MIO paints resist harsh factory conditions, UV exposure, and high temperatures.

🌍 5. Environmental & Corrosion Control
  • MIO is used in environmentally exposed metallic structures (e.g., coastal areas, industrial belts) to meet corrosion category C4 and C5 protection standards (ISO 12944).

  • Especially effective in multi-coat paint systems, often as a middle coat between zinc-rich primers and topcoats.

🖌️ 6. Artistic and Decorative Applications
  • In art and heritage restoration, MIO’s natural metallic luster is used to replicate historical finishes and give antique looks.

🔬 7. Research & Specialty Applications
  • Micaceous iron oxide nanoparticles are being researched for:

    • Magnetic materials

    • Catalytic applications

    • Composite fillers in resins and plastics

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Emery Grain

Emery Grain
  • Emery Grain
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Approx. Price: Rs 98 / KgGet Latest Price

Product Details:

Grit Size36
FormGrains
UsageEmery Paper
Packaging Size50 Kgs
MaterialBrown Aluminium Oxide
Purity99%
ColorBrown
Usage/ApplicationAbrasive

Brown Fused Aluminium Oxide (BFA) is a highly durable and tough abrasive made by fusing bauxite in an electric arc furnace. It is commonly used in emery applications due to its excellent hardness (Mohs ~9), thermal resistance, and sharp cutting ability.

Uses & Applications of Brown Fused Aluminium Oxide for Emery Applications 1. Abrasive Papers & Emery Cloths
  • Used as the primary abrasive in emery paper, emery cloth, and abrasive rolls.

  • Suitable for grinding, polishing, and surface finishing of metals, wood, plastic, and ceramics.

  • Offers consistent grain size and sharp cutting edges, enhancing surface finishing quality.

2. Coated Abrasives
  • Coated onto flexible backings (paper, cloth, or film) for sanding belts, sheets, and discs.

  • Ideal for manual and machine sanding processes in metal fabrication, woodworking, and automotive sectors.

3. Bonded Abrasives (Emery Wheels)
  • Used in the manufacture of grinding wheels and cutting discs.

  • Performs well in heavy-duty grinding applications for carbon steel, alloy steel, and cast iron.

4. Hand Tools and Emery Boards
  • Embedded into emery boards and nail files in the cosmetic and personal care industry.

  • Also used in hand-held abrasive tools for fine finishing or deburring.

5. Surface Preparation
  • Employed in the preparation of surfaces before painting or coating (metal degreasing and rust removal).

  • Used in grit blasting or shot blasting where consistent surface texture is needed.

6. Precision Lapping & Honing
  • Used in lapping compounds and honing tools where precision material removal is required on flat or cylindrical surfaces.

7. Refractory & Anti-skid Surfaces (Secondary Use)
  • Sometimes added to anti-slip surfaces and high-wear flooring tiles due to its extreme hardness.

⚙️ Key Properties Making BFA Ideal for Emery Applications
  • High hardness (~Mohs 9)

  • High thermal resistance

  • Angular shape for aggressive cutting

  • Reusable in blasting and durable in bonded/ coated tools

  • Chemically stable and resistant to corrosion


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Sanklesh Chabria (Managing Partner)
Astrra Chemicals
No.532/1B 3, Vanagaram Road, Ambattur, Chennai - 600053, Tamil Nadu, India
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