Niobium Iron Alloy:
Aluminum - Al 0.586%
Carbon - C 0.134%
Iron - Fe 28.322%
Manganese - Mn 0.191%
Niobium - Nb 65.153%
Phosphorus - P 0.111%
Lead - PB 0.116%
Sulfur - S 0.076%
Silicon - Si 2.330%
Tin - Sn 0.052%
Tantalum - Ta 2,529%
Titanium - Ti 0.400%
Size - 5 to 15mm.
Each batch has different properties, as for Niobium it is always equal to or greater than 65%.