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ISRI CODE R50-R65
Composition
C - 0.54-0.82%,
SI - 0.18-0.40%,
MN - 0.60-1.05%,
S - 0.04% maximum
P - 0.035% maximum
AS: - 0.01% Maximum of Mass Share
HMS is usually traded as a blend of 1 & 2, either a premium blend (80:20) or lower grade mixes (70:30) and (60:40).
