标准号:IS 7965-1976
发布日期:1976/5/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This standard covers niobium (columbium), both as primary metal and in consolidated ingot form. The primary metal can be in the form of powder, beads or sponge as produced in the extraction step. The ingot metal can be arc melted, electron beam melted or as consolidated by powder metallurgy.