carbide rods, carbide bars, carbide round rods
As one of the Leading Carbide Manufacturers in China, China Powder Metallurgy Enterprise Ltd  produces varieties of carbide rods, such as carbide rods with 1 or 2 coolant holes, h6 ground or as-sintered carbide rods, full-length ( 300-330mm) or cut-to-lenth carbide rods. The diameter can be available from 1.0 mm to 25.4 mm.
For your reference,I am enclosing a very frequently used grade for your reference:
 ***Materials
Grade:DW30UF
Co: 10%
WC: 89.5% or so
Others: 0.5% or so.
Hardness>92 HRA,
TRS>3800N/mm2  
Density: 14.45g/cm3
Grain Size: 0.6  micron, 
Porosity: 
Of course, with regard to our quality, I am very glad to advsie you that we can send you some pcs free samples for the test...if there is something that I can help you,p lease don't hesitate to let me know. I am at your service at any time.
 
I am looking forward to hearing from you.
Hyman