Convert density before multiplying it by volume. A density in grams per cubic centimeter cannot be used directly with dimensions in inches; that unit mismatch can overwhelm an otherwise correct weight estimate.
Use the density and weight calculator for the estimate, with the grade density and dimensions identified.
The conversion factor, with a cross-check
Multiply g/cm3 by 0.0361273 to obtain lb/in3. For the reverse conversion, multiply lb/in3 by 27.6799. These factors combine the exact inch-to-centimeter and pound-to-gram definitions.
| Illustrative density (g/cm3) | Equivalent density (lb/in3) |
|---|---|
| 14.0 | 0.50578 |
| 14.5 | 0.52385 |
| 15.0 | 0.54191 |
For a 1.000 in3 volume at an assumed density of 14.5 g/cm3, mass is 0.52385 lb. A metric check gives 16.387064 cm3 x 14.5 = 237.6124 g; dividing by 453.59237 g/lb gives the same result. Keep extra digits during the calculation and round only the final answer.
Choose the material value separately
The table is a conversion reference, not a list of Extramet grades. Obtain the density for the actual grade, including its binder formulation. Do not substitute pure tungsten density for cemented tungsten carbide.
Unit reference: NIST conversion factors.
Why carbide density varies by grade
Tungsten carbide is not a single pure-metal material in most industrial parts. It is usually cemented carbide: hard tungsten carbide grains held in a cobalt or nickel binder. Changing binder percentage, grain size, and formulation changes density, hardness, toughness, and wear behavior.
The core formulas
For rectangular blanks, multiply length by width by thickness, then multiply by density. For rods and pins, use the cylinder volume formula based on diameter and length. Keep units consistent before converting to pounds, ounces, or grams.
How buyers should use the number
Density is useful for estimating material cost, shipping, fixture loads, and part balance. It should not replace grade selection. If the part will see impact, abrasive wear, corrosion, or high contact stress, the grade decision comes first and the weight estimate follows.
Frequently Asked Questions
Is tungsten carbide heavier than steel?
Yes. Cemented tungsten carbide is usually much denser than steel, so a carbide part with the same dimensions will generally weigh more.
Can I use one density for all carbide grades?
Use one number only for rough estimating. For quoting and production, use the density of the actual Extramet grade or specified equivalent.
Does cobalt binder change weight?
Yes. Binder percentage affects density, toughness, and hardness, so the same part geometry can have different weight by grade.
For round stock, follow the rod-weight worked example to keep diameter, radius and units consistent.
The tungsten-versus-carbide weight reference explains why material identity matters before using a density value.
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.