Carbide Bars / Tungsten Bars / Tungsten Carbide Tool Tips

Product Description

1. The Core Metallurgical Difference

• Pure Tungsten (W): A dense metallic element ($\sim19.3\text{ g/cm}^3$) with the highest melting point of all metals ($3422^\circ\text{C}$). It is chosen for high-temperature stability (furnace heating elements, TIG welding electrodes) and high mass (radiation shielding, balancing weights). It lacks the extreme wear resistance needed for cutting tools.

• Tungsten Carbide (WC): A compound made by binding tungsten carbide ceramic grains within a metallic matrix (typically Cobalt or Nickel). It features extraordinary hardness (Mohs 9–9.5, second only to diamond), high compressive strength, and superb abrasion resistance, making it the premier choice for cutting, drilling, and milling.

2. Industry Classifications & Grade Selection

Tungsten carbide tooling and raw stock are standardized under the ISO 513 classification system. This system balances hardness (provided by the WC grains) against shock toughness (provided by the cobalt binder percentage):

• P-Series (Blue): Contains added Titanium Carbide (TiC) and Tantalum Carbide (TaC) to resist hot-hardness deformation and crater wear. Optimized for machining long-chip carbon and alloy steels.

• M-Series (Yellow): A versatile, balanced configuration engineered to withstand work-hardening and thermal shock. Primarily used for machining stainless steels, manganese steels, and cast steel.

• K-Series (Red): Employs a straight WC-Co blend with fine-to-medium grains. Excellent for short-chip materials like gray cast iron, non-ferrous metals (aluminum, brass), titanium, and abrasive non-metallics (wood, composites).

3. Sourcing Form Factors

Tungsten Carbide Bars & Rods

Stock bars are manufactured via powder metallurgy and are used to grind custom cutting tools, end mills, or heavy-duty industrial wear linings.

• Tungsten Carbide Round Bars: Features a high-hardness alloy profile designed to withstand intense friction in metalworking, forging, and oil drilling machinery components.

• Tungsten Carbide Square Bar Kup409: Features a 9% Cobalt fine-particle substrate, supplying a 4000 MPa tensile strength and 93.2 HRA hardness engineered for machining demanding materials like chilled alloy cast iron.

Tungsten Carbide Tool Tips & Inserts

Replaceable indices or braze-on tips provide a highly rigid cutting edge while conserving costs by using an alloy steel tool body.

• TCT Tips - 15x15x2.5 mm: A premium micro-grain reversible knife insert featuring an HRA 91–93 hardness and a mirror-polished 37° bevel optimized for long tool life in high-precision CNC woodworking heads.

• Tungsten Carbide Cutting Bur Set: A double-cut rotary profile utilizing tough YG8 tungsten steel for deburring, grinding, and polishing hardened carbon steel, stainless steel, and cast iron castings.

Summary Table: Material Selection by Application