This guide supports Extramet’s tungsten carbide blanks by answering the practical engineering and purchasing questions that usually come before an RFQ.
Quick Answer
- Blank grade should follow the finished part application.
- Higher hardness is not always better.
- Binder content and grain size influence toughness, wear, density, and grindability.
| Application need | Grade tendency | Watchout |
|---|---|---|
| Abrasive wear | Higher hardness | Chipping risk |
| Impact | More toughness | Lower wear resistance |
| Corrosion | Binder chemistry matters | Confirm environment |
| Precision grinding | Stable grade and allowance | Finish and edge risk |
The blank is not the final decision
A carbide blank is a starting form. Grade selection should anticipate the final part's wear mode, tolerance, geometry, and operating conditions.
Binder and grain size
Cobalt binder percentage and grain size help tune hardness and toughness. Nickel binder may be considered where corrosion resistance matters. These properties also influence density and finishing behavior.
How to narrow choices
Describe the application, contact material, load, speed, lubrication, temperature, and current failure mode. That context is more valuable than asking for the hardest possible grade.
What to Include in an RFQ
- finished part use
- wear or failure mode
- binder preference if known
- grade alternates allowed
Related Extramet Resources
Reviewed for technical accuracy: This supporting article was prepared to align with Extramet’s tungsten carbide manufacturing, grinding, inspection, and quality capabilities in Latrobe, Pennsylvania.
Frequently Asked Questions
Should I choose the hardest blank grade?
Not automatically. The hardest grade may chip if the application requires toughness.
Does binder content affect density?
Yes. Binder percentage changes density along with hardness and toughness.
Can Extramet help select a grade?
Yes. Application details and a drawing help narrow the grade options.