YG15 Tungsten Carbide Punch with High Impact Resistance for T-Shaped & R-Shaped Cold Heading

In cold heading, heavy stamping, and forging operations, the punch must withstand extreme mechanical stress—repeated impact loads, high compressive forces, and abrasive wear—while maintaining precise dimensional accuracy over millions of cycles. When conventional tool steel punches fail prematurely due to cracking, deformation, or wear, the cost in downtime and lost productivity is immediate and significant.

Our YG15 Tungsten Carbide T-Shaped and R-Shaped Punches are engineered specifically for these demanding high-impact applications. Manufactured from premium YG15 cemented carbide—a high-cobalt (15% Co) tungsten carbide grade renowned for its exceptional combination of strength, toughness, and wear resistance—these punches deliver the durability and reliability required for the most challenging cold heading, stamping, and forging operations.

The T-shaped punch and R-shaped punch are specialized tooling geometries designed for specific forming applications. Their distinctive profiles enable precise material displacement and part formation in multi-stage cold heading and progressive stamping processes, where standard cylindrical punches cannot achieve the required geometry or withstand the applied stresses.

YG15 is a tungsten-cobalt (WC-Co) cemented carbide grade consisting of approximately 85% tungsten carbide (WC) and 15% cobalt (Co) binder. This composition delivers a unique balance of properties that makes it the preferred material for high-stress forming tools:

• Superior Impact Resistance: The 15% cobalt binder content provides YG15 with significantly higher toughness than lower-cobalt grades like YG6 or YG8. This makes it ideal for applications involving large stress and significant impact loads.
• High Strength Under Load: YG15 exhibits excellent compressive strength and flexural strength, maintaining its structural integrity under the extreme pressures encountered in cold heading and heavy stamping.
• Good Wear Resistance: While YG15's wear resistance is slightly lower than that of YG8, its superior strength and toughness make it the better choice for applications where impact resistance is the primary requirement.
• Proven in Demanding Applications: YG15 is widely used for punching, stamping, and forging tools under large stress, as well as drawing dies for steel tubes and rods under high compressibility ratios. It is also suitable for motor and electronics progressive die punches and dies.
• Cost-Effective Performance: YG15 offers an excellent balance of performance and cost, making it the grade of choice for high-volume production environments where tool longevity directly impacts profitability.

The T-shaped punch features a distinctive T-profile with a wider head section and a narrower body, designed for specific cold heading and forming applications.

• Cold heading of T-shaped fasteners: Bolts, screws, and other fasteners with T-head configurations
• Multi-stage cold forming: Progressive forming operations where the T-profile enables precise material displacement
• Bulk material forming: Applications requiring significant material flow and deformation
• Progressive die stamping: Where the T-shape provides enhanced guidance and alignment

The R-shaped punch features a radiused or curved forming surface, enabling smooth material flow and reduced stress concentrations during forming operations.

• Radius forming: Creating curved or radiused features in formed parts
• Reduced stress concentration: The R-profile distributes forming forces more evenly, reducing the risk of material cracking or punch fracture
• Smooth material flow: The radiused surface promotes consistent material displacement during cold heading
• Improved surface finish: The R-profile produces smoother formed surfaces, reducing or eliminating secondary finishing operations

In many cold heading applications, T-shaped and R-shaped punches are used in combination within multi-station forming systems. The T-punch performs initial material displacement and head forming, while the R-punch provides final shaping with smooth radiused transitions. This sequential approach enables the production of complex fastener geometries with high precision and consistency.

• Material Certification: Full traceability with batch records confirming composition, density, hardness, and TRS
• Dimensional Verification: 100% inspection of critical dimensions (diameter, length, profile geometry, concentricity)
• Surface Finish Measurement: Profilometer and white light interferometer verification
• Hardness Testing: Verified uniformity throughout the punch
• ISO 9001:2015 Certified: Quality management systems ensure consistent product quality

T-shaped punches are used in cold heading and forming operations to create fasteners and components with T-head configurations. They are also used in progressive die stamping where the T-profile provides enhanced guidance and alignment.

R-shaped punches feature a radiused forming surface that enables smooth material flow, reduces stress concentrations, and produces improved surface finish on formed parts. They are commonly used in cold heading and forming operations where curved or radiused features are required.

Yes. We manufacture punches to your exact specifications, including custom T-profiles, R-profiles, and other specialized geometries. Please provide your drawing or requirements for a prompt quote.