This document provides the chemical properties and sieve analysis specifications for an iron alloy called HC FECR 69% 5-15MM. The alloy contains between 66-90% iron, 9,000-1,000% carbon, and no more than 0.050% sulfur and 0.040% phosphorus. The sieve analysis shows that 5-15mm sized particles must make up between 66-90% of the material.