|---|

|Fe|≤0.005|

|Si|≤0.005|

|Al|≤0.005|

|Ca|≤0.005|

|Mg|≤0.005|

|Ni|≤0.005|

|Cu|≤0.005|

|Zn|≤0.005|

|Pb|≤0.005|

|Sn|≤0.005|

|Sb|≤0.005|

|Bi|≤0.005|

|As|≤0.005|

|Cd|≤0.005|

|Hg|≤0.005|

|Cr|≤0.005|

|Mn|≤0.005|

|Ti|≤0.005|

|Zr|≤0.005|

|V|≤0.005|

|Mo|≤0.005|

|Nb|≤0.005|

|Ta|≤0.005|

|W|≤0.005|

2. 物理性能：标准规定了超细钨粉的粒度、松装密度、振实密度、比表面积等物理性能指标。粒度应符合表2的规定，松装密度应不低于4.5g/cm³，振实密度应不低于6.0g/cm³，比表面积应不大于1.0m²/g。

|粒度（μm）|通过率（%）|

|---|