Metric Carbide Blanks:Complete Manufacturing Guide

Carbide blanks in metric dimensions provide the starting material for making cutting tools, dies, and wear parts through grinding and machining. This guide covers metric tungsten carbide blanks for metalworking applications.

Overview of Metric Carbide Blanks

  • Made from tungsten carbide-cobalt (WC-Co)
  • High hardness, wear resistance and compressive strength
  • Available in metric sizes as rods, discs, cylinders, blocks
  • Ground to final dimensions and geometry for tools
  • Ideal for high-speed machining applications

Typical sizes:

  • Diameters: 1 to 75 mm
  • Lengths: 5 to 300 mm
  • Discs up to 300 mm diameter

Common grades:

  • Straight tungsten carbide (WC)
  • 6% cobalt, 10% cobalt and 15% cobalt

Carbide blanks provide the optimal starting material for metalworking, cutting and forming tools.

Applications of Metric Carbide Blanks

Metric carbide blanks are used to manufacture:

  • Cutting tools – drills, endmills, chamfer tools
  • Forming and stamping dies
  • Drawing and extrusion dies
  • Pelletizing and pulverizing tools
  • Wear parts and nozzles
  • Punching and pressing tools
  • Mining and construction tools
  • Slurry and pumping seals
  • Metal deburring and finishing tools

Carbide blanks enable optimal tooling geometries and complex contours for maximum productivity.

Advantages of Carbide Blanks

  • High wear resistance and hardness
  • Maintains sharp cutting edge
  • Withstands high machining speeds and feeds
  • High temperature and chemical resistance
  • Consistent quality from standard blanks
  • Available in a wide range of sizes
  • Cost-effective compared to custom preforms
  • Shorter lead times

Carbide blanks provide an excellent starting raw material for tooling requirements.

metric carbide blanks

Types of Metric Carbide Blanks

1. Cobalt Content

  • Straight tungsten carbide (WC)
  • 6% cobalt (WC-Co 6%)
  • 10% cobalt (WC-Co 10%)
  • 15% cobalt (WC-Co 15%)

2. Quality Grades

  • Standard/Commercial quality
  • Premium/Air-craft quality
  • Superior/Nuclear quality

3. Physical Format

  • Rod blanks
  • Cylindrical blanks
  • Disc blanks
  • Custom preform blanks
  • Rectangular/square blanks
  • Complex profile blanks

Popular standard sizes are readily available off the shelf from stock. Custom preforms can also be manufactured.

Material Properties

Properties of tungsten carbide-cobalt grades:

GradeHardness HRATransverse Rupture Strength MPaDensity g/cc
Straight WC89.0 – 93.0145014.95
WC-6Co89.0 – 91.5165014.70
WC-10Co86.5 – 89.0185014.30
WC-15Co84.0 – 88.0185013.60

Higher cobalt content improves fracture strength but decreases hardness.

International Size Standards

Metric carbide blanks are available in standard sizes as per:

  • ISO 1832 – Indexable inserts for cutting tools
  • DIN 6580 – Solid carbide endmills and drills
  • ANSI B212.4 – Tool holder boring bar shank dimensions
  • DIN 8030 – Drawing die blanks
  • Custom sizes also manufactured

Standard sizes optimize material usage and lower machining costs.

Size Range Examples

Round Rod Blanks

Diameters: 1mm to 75 mm Lengths: 5 mm to 300 mm

Square Block Blanks

Sizes: 4 mm to 60 mm Lengths: 8 mm to 150 mm

Rectangular Blocks

Widths: 6 mm to 75 mm Lengths: 20 mm to 180 mm

Disc Blanks

Diameters: 25 mm to 300 mm Thicknesses: 3 mm to 25 mm

Metric blanks cover a wide range of tooling sizes. Custom preforms also available.

Technical Specifications

Carbide gradeStraight WC, WC-Co 6%, 10%, 15%
Hardness range84 to 93 HRA
Density13.6 to 15 g/cc
Transverse rupture strength1450 to 1850 MPa
Coarseness0.2 to 15 μm
Total porosityA06, B00, C00
Surface finishUp to 0.4 μm Ra
Dimensional tolerances±0.1 to 0.3 mm
Chamfer and edge prepOptional
CertificationsISO 9001, ISO 14001

Grades, finishes, chamfers and tolerances can be customized as per application requirements.

Manufacturing Process

1. Milling: Rough mills carbide blocks to oversize blanks

2. Grinding: Grinds blanks to precise dimensions and finishes

3. Chamfering and Edge Prep: Done if specified

4. Testing and Inspection: Confirms dimensions, finish, grade etc.

5. Packaging: Careful packing to avoid damage in transit

Automated, high-precision manufacturing ensures consistent quality metric carbide blanks.

Global Suppliers and Price Ranges

SupplierLocationPrice Range
Cera MaterialsUSA$2 – $30 per piece
CeratizitLuxembourg$5 – $50 per piece
KennametalUSA$3 – $35 per piece
Yi Bang IndustrialChina$2 – $25 per piece
Miranda ToolsIndia$1 – $15 per piece
  • Prices depend on size, grade, quality, tolerance and order volume
  • Larger blanks and premium grades cost more
  • Custom preforms are higher cost
  • Price decreases with quantity due to scaling

Packing for Safe Transport

Carbide blanks require careful packing to prevent damage:

  • Individual pieces wrapped in abrasive-resistant paper
  • Grouped in cardboard boxes with compartment slots
  • Cushioned with foam or soft wrapping
  • Secured in crate or pallet for load stability
  • Desiccant bags to absorb moisture
  • Labelling with details like grade, size, PO number
  • Fragile labels on box to prevent mishandling

Proper packing ensures blanks reach the customer unblemished and ready to use.

Design Considerations for Blanks

  • Select grade based on hardness and strength needs
  • Consider section size, availability, and utilization
  • Minimize machining requirements if possible
  • Design contour andrelief angles appropriately
  • Accommodate mounting interfaces and hardware
  • Plan for smoothing beads and corner radii
  • Leave sufficient material for coating if needed
  • Avoid thin or unstable projecting features

Collaborating with carbide blank suppliers during the design stage is recommended to optimize the blanks.

How to Select the Right Blank Supplier

Factors for choosing a metric carbide blank supplier:

Technical capabilities:

  • Can they supply the grades and tolerances required?
  • Do they have size range to meet needs?
  • Will they manufacture custom preforms?


  • Consistency in dimensions and material properties
  • Stringent manufacturing process controls
  • Robust quality management system


  • Technical consultation for design and material selection
  • Flexibility in order quantities and lead times
  • Willingness for new product development


  • Competitive transparent pricing
  • Responsiveness to RFQs and quotes
  • Ease of order placement and follow-up


  • Packaging expertise to prevent transit damage
  • On-time delivery capabilities
  • Inventory and stocking abilities

Evaluating carbide blank suppliers on these parameters ensures getting a partner that delivers ideal blanks cost-effectively.

Pros and Cons of Carbide Blanks


  • Enables optimized tool geometry
  • Higher performance than assembled inserts
  • Sintered structure with minimal defects
  • Protects IP versus purchasing inserts
  • Cost-effectiveness for medium volumes
  • Shorter lead times than custom preforms


  • Additional grinding/machining needed
  • Higher unit costs than mass produced inserts
  • Technical expertise needed for design
  • Minimum order quantities may apply

Troubleshooting Carbide Tool Failures

Failure ModePossible CausesCorrective Actions
FracturePoor grade or substandard materialSwitch suppliers, get certification
Inadequate machining/surface defectsImprove machining methods
Overload beyond designRedesign tool geometry and usage
WearWrong grade for applicationSelect grade with higher wear resistance
Insufficient surface finishEnsure fine finishing of 0.1-0.4 μm Ra
Operation outside limitsModify operating parameters within limits
ChippingUnfavorable geometryRedesign edge angles, avoid sharp corners
Interrupted cutsOptimize approach, speed, feed rates
Built-up edgeUse proper coatings, clearance angles

Consulting with the blank supplier helps correct carbide tool failures.


Q: What size metric carbide blanks are commonly stocked?

A: Most suppliers stock a range of 1mm-20mm rods, 20mm-75mm discs, and squares from 4mm-25mm.

Q: What is the lead time for procuring custom preforms?

A: Custom blank preforms may need 4-6 week lead time depending on the supplier.

Q: What certification is provided with blanks?

A: Reputable suppliers provide material certification per ISO standards and lot-specific test reports.

Q: Does using higher cobalt blanks increase toughness?

A: Yes, 10-15% cobalt grades provide the best combination of wear resistance and toughness.

Q: What post-processing method strengthens carbide?

A: CVD or PVD coatings deposited on the carbide surface increase hardness and wear life significantly.

Q: How should damaged carbide blanks be handled?

A: Never use damaged, cracked or corroded blanks which can fail unexpectedly. Reject them and return to the vendor.


Metric tungsten carbide blanks offer an economical starting format for manufacturing custom cutting, stamping and forming tools to meet specific productivity targets. With high wear resistance and compressive strength, carbide blanks can be ground into inserts and dies with complex shapes, profiles and surface coatings not possible with assembled inserts. Partnering with a qualified carbide blank supplier and leveraging their technical expertise in material selection and design ensures a cost-effective tooling solution optimized for the application. With stringent quality control and international material certification, metric carbide blanks provide a building block approach to maximize productivity in machining and metalworking.

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