牌号：W-4纯度：W≥99.9%规格：15mm*15mm*550mm包装：木箱单根重量：1.2kg用途：用于精密铸造用配料，炼钢添加剂等成份分析(%)主成分含量W≥99.9其它元素含量≤Al0.0003As0.002Bi0.00005Ca0.0006Co0.0003C0.0024Cu0.0003Fe0.012P0.0005Mg0.0003Mo0.0036Ni0.003Pb0.0001Sb0.0001Si0.0008Sn0.0001N0.003V0.0005Cd0.0001O0.023Ti0.0001S0.0003Cr0.0034Na0.0005)