Select a tungsten carbide grade by the application and failure mode, then verify the material data and manufacturing requirements. The hardest available grade is not automatically the best choice for a supported wear surface, thin edge or impact-loaded part.
A repeatable grade-selection workflow
| Step | Decision to resolve | Evidence to keep |
|---|---|---|
| 1. Define the job | What contacts the part and what must remain stable? | Drawing, mating material and acceptance limits |
| 2. Identify damage | Wear, fracture, corrosion or a combination? | Failed part, images and service history |
| 3. Review geometry | How is load carried and where is support limited? | Load direction, edges, radii and assembly details |
| 4. Compare material | Which documented grades fit the requirements? | Grade sheets and comparable test methods |
| 5. Confirm finishing | Can the final features and surfaces be made and checked? | Process and inspection scope |
| 6. Validate | What trial result will justify approval? | Acceptance criteria and observed results |
Start with the Extramet grade information once the application is described. A catalog designation organizes the material choice; it does not replace drawing review or application testing.
Keep property data in context
Cemented carbide combines hard carbide grains with a metallic binder. Binder chemistry and content, grain structure and formulation affect the resulting properties. Compare hardness using the same scale and test basis, and do not treat a strength value from a specimen test as an allowable stress for every part geometry.
The manufacturing conversation belongs here too. A blank that will be finish-ground by another shop needs an agreed material designation and stock condition. A finished component needs accepted geometry, surface and inspection requirements.
An illustrative decision path
For a pin wearing undersize, first document the contact zone and service interval. If inspection instead shows fracture near the holder, investigate support and load rather than assuming more hardness is the answer. These paths organize the questions; they do not identify a specific grade without the application evidence.
Use the selector as an intake tool
The grade selector can help organize a request. Confirm the resulting direction with Extramet before ordering. Include the drawing revision, current grade if known, work material, load, environment, quantity and relevant failure evidence.
Frequently asked questions
Can Extramet help choose the grade?
Extramet can review the application and help narrow the material choice. Supply the drawing, operating conditions and failure evidence so the recommendation is tied to the actual part.
Should I choose the hardest carbide grade?
Not automatically. Hardness is one property; support, impact, edge geometry, environment and finishing requirements can change the appropriate balance.
For unfinished material, review blank grade selection before approving substitutions or releasing downstream grinding.
The wear-versus-impact diagnostic guide helps separate progressive loss of material from fracture symptoms.
Send the drawing, application and quantity through the RFQ form when the requirements are ready for review.
Product questions? Contact Michael Douglas, Extramet Products product expert and Sales and Marketing contact.