常用钨粉粒度一般为费氏平均粒度2～10μm。钨粉为多角形颗粒形状。此外，钨粉的比表面、松装密度、摇实密度等也在一定范围内变化。钨粉的性能对钨材的生产和钨粉末冶金制品的质量有直接的影响，特别是纯度和粒度的影响更为明显。钨粉是依据纯度和粒度以及不同的用途而分类的。
钨粉等级
根据颗粒度不同，钨粉可分为14个等级：

   等级                          颗粒度(?)                       氧含量( %,Max. )

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   W-0                          0.40~0.69                             0.3
   W-1                          0.70~0.99                             0.3
   W-2                          1.00~1.49                            0.25
   W-3                          1.50~1.99                             0.2
   W-4                          2.00~2.49                            0.15
   W-5                          2.50~2.99                            0.15
   W-6                          3.00~3.49                             0.1
   W-7                          3.50~3.99                             0.1
   W-8                          4.00~4.49                             0.07
   W-9                          4.50~4.99                             0.07
   W-10                         5.00~6.99                             0.05
   W-11                         7.00~8.99                             0.05
   W-12                         8.99~14.99                             0.05
   W-13                         15.00~25.00                            0.05