ASTM ASTM B631-93(2016) - August 15, 2019 - admin Click here to purchase 1.1 This specification covers electrical contact components made from silver-tungsten by powder-metallurgical procedures. Product Details Published: 05/01/2016 Number of Pages: 4 File Size: 1 file , 70 KB Post navigation AWS D14.3/D14.3M:2005AWS D14.1/D14.1M:2005