Tungsten Carbide Round Bars

Tungsten Carbide Round Bars

Tungsten Carbide Round Bars Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a leading manufacturer, supplier, stockist, and exporter of Tungsten Carbide Round Bars in Mumbai, India. We supply these premium carbide bars across India and export globally to the USA, Europe, Middle East, Canada, Australia, and Southeast Asia.

Tungsten carbide is a hard, wear-resistant composite material made from tungsten and carbon, often bonded with cobalt. Tungsten carbide round bars are used extensively in cutting tools, dies, industrial machinery, and high-precision engineering components, where extreme hardness, wear resistance, and high-temperature strength are required.

Tungsten Carbide Round Bars

What Are Tungsten Carbide Round Bars?

Tungsten Carbide Round Bars are cylindrical rods made from tungsten carbide (WC) with a metallic binder, usually cobalt (Co). They are known for their ultra-high hardness, abrasion resistance, and thermal stability, making them suitable for the most demanding industrial, mining, and tooling applications.

Key features of tungsten carbide round bars:

  • Extreme hardness, often exceeding HV 1600
  • High wear and abrasion resistance
  • Excellent thermal and chemical stability
  • High compressive strength
  • Suitable for precision machining and tooling applications
  • Long service life even under extreme mechanical and chemical conditions

These properties make tungsten carbide round bars ideal for cutting tools, drilling, mining, wear parts, and industrial machinery.


Key Features of Tungsten Carbide Round Bars

  • Exceptional hardness for cutting, drilling, and wear-resistant applications
  • Superior abrasion and erosion resistance
  • High compressive strength for heavy-duty industrial use
  • Thermal stability for high-speed cutting and machining
  • Excellent corrosion resistance in most industrial environments
  • Can be precision-ground for tooling and dies
  • Long service life under extreme mechanical stress

These characteristics make tungsten carbide round bars the preferred choice for high-precision, heavy-duty industrial and mining applications.


Composition of Tungsten Carbide Round Bars

Tungsten carbide round bars are typically composed of:

Material Composition (%)
Tungsten (W) 82 – 94%
Carbon (C) 6 – 8%
Cobalt (Co) 6 – 10% (as binder)
Optional additives Nickel, titanium carbide, tantalum carbide

Role of Materials

  • Tungsten Carbide (WC): Provides ultra-high hardness and wear resistance
  • Cobalt Binder: Ensures toughness and prevents brittleness
  • Optional Carbides (TiC, TaC): Enhance hardness, wear resistance, or thermal stability

The combination of tungsten carbide and cobalt ensures a perfect balance of hardness and toughness.


Mechanical Properties of Tungsten Carbide Round Bars

Tungsten carbide bars are known for extreme mechanical performance:

  • Hardness (HV): 1400 - 2200
  • Compressive Strength: 2800 - 4200 MPa
  • Density: 14.5 - 15.7 g/cm³
  • Flexural Strength: 500 - 1000 MPa
  • Young's Modulus: 550 - 700 GPa
  • Coefficient of Thermal Expansion: 5 - 6 µm/m°C

These properties allow tungsten carbide bars to withstand extreme wear, high compressive forces, and thermal cycling in industrial applications.


Physical Properties of Tungsten Carbide Round Bars

  • Melting Point: 2870°C
  • Thermal Conductivity: 110 W/m·K
  • Electrical Resistivity: 0.2 – 0.3 µΩ·m
  • Corrosion Resistance: High in most acids; inert in neutral environments
  • Magnetic Properties: Non-magnetic

Tungsten carbide round bars provide durable and stable performance under extreme mechanical and thermal conditions.


Heat Treatment of Tungsten Carbide Round Bars

Tungsten carbide bars are typically sintered rather than heat-treated, as sintering achieves the desired density, hardness, and mechanical strength.

Sintering Process

  • Mixed tungsten carbide powder with cobalt binder
  • Pressed into desired cylindrical shapes
  • Sintered at 1400 – 1600°C in a controlled atmosphere
  • Achieves near-theoretical density and ultra-high hardness

Sintered tungsten carbide bars are ready for precision grinding, machining, or tool fabrication.


Machinability of Tungsten Carbide Round Bars

Tungsten carbide is extremely hard, making it difficult to machine with conventional tools:

  • Precision grinding, EDM (electrical discharge machining), and laser cutting are recommended
  • Use diamond or CBN (cubic boron nitride) tools for machining
  • Low feed rate and high coolant flow recommended
  • Suitable for cutting tools, wear parts, dies, and precision components

With proper machining, tungsten carbide bars can achieve micron-level tolerances and smooth surface finishes.


Corrosion Resistance of Tungsten Carbide Round Bars

  • Resistant to most acids, alkalis, and oxidizing environments
  • Stable at high temperatures and under mechanical wear
  • Can withstand abrasive and erosive conditions
  • Suitable for chemical, mining, and industrial applications

Tungsten carbide bars offer long-term durability and corrosion resistance in industrial applications.


Applications of Tungsten Carbide Round Bars

Tungsten carbide bars are used across industrial, mining, tooling, and engineering applications:

Cutting & Tooling

  • End mills, drills, reamers, and saw blades
  • Wear-resistant inserts for metalworking
  • Precision tooling for CNC machines

Mining & Drilling

  • Drill bits for rock, oil, and gas
  • Mining tools for coal, ore, and aggregate processing
  • Wear-resistant components for heavy machinery

Industrial Machinery

  • Bearings, wear plates, and nozzles
  • High-pressure pump components
  • Dies and molds for metal forming

Aerospace & Defense

  • Precision components requiring high strength and wear resistance
  • Jet engine nozzles and turbine components

Other Applications

  • Extrusion dies for plastics and rubber
  • Industrial wear parts for harsh environments
  • High-performance precision engineering components

Advantages of Tungsten Carbide Round Bars

  • Ultra-high hardness and wear resistance
  • Exceptional compressive strength for heavy-duty applications
  • Thermal and chemical stability for extreme conditions
  • Long service life even under high stress and abrasion
  • Suitable for precision tooling, mining, and industrial machinery
  • Can be precision-ground, EDM machined, and fabricated into complex shapes

Available Sizes & Specifications

Tungsten carbide round bars are supplied in:

Standards:

  • ISO 513
  • ASTM B777 / B760

Size Range:

  • Diameter: 2 mm – 100 mm
  • Length: 50 mm – 600 mm or custom lengths
  • Tolerances: ±0.01 mm to ±0.05 mm depending on grade

Surface Finish:

  • Sintered or ground
  • Polished or as-pressed

Quality Testing & Inspection

All tungsten carbide bars undergo:

  • Chemical composition verification
  • Hardness and density testing
  • Dimensional and surface inspection
  • Mechanical property verification

Mill Test Certificates (MTC) are provided per ASTM and ISO standards. Third-party inspection is available upon request.


Why Choose Virami Steel Hub for Tungsten Carbide Round Bars?

  • Trusted manufacturer and supplier in Mumbai, India
  • High-quality tungsten carbide for tooling, mining, and industrial applications
  • Custom sizes, grades, and surface finishes available
  • Competitive pricing with global delivery
  • Certified quality assurance and MTC
  • Expertise in precision engineering, wear-resistant components, and high-performance tooling

Conclusion

Tungsten Carbide Round Bars are premium, ultra-hard, wear-resistant bars offering exceptional hardness, compressive strength, and thermal stability. Ideal for cutting tools, industrial machinery, mining, and precision engineering, tungsten carbide bars ensure long-term durability, precision, and performance under extreme conditions.

Virami Steel Hub supplies certified Tungsten Carbide Round Bars with customizable sizes, lengths, and surface finishes, making them the preferred choice for critical industrial, mining, tooling, and high-performance applications.

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