The Rails shall conform to ISRI CODE R50-R65 and will be Used Rail
Steel Scrap- Standard section” Rails, between 1.2 meters to 1.7
HMS stands for heavy melting scrap, and 1 & 2 are the two
grades within that definition. Heavy melting steel (HMS) or heavy
melting scrap, is a designation for recyclable steel and wrought
iron. It is broken up into two major categories: HMS 1 and HMS 2.
The difference between the two is HMS 1 does not contain galvanized
and blackened steel, whereas HMS 2 does.
Both HMS 1 & 2 comprise obsolete scrap only. That is iron and
steel recovered from items demolished or dismantled at the end of
their life. Because both grades guarantee a minimum piece thickness
– at least 1/4inch (6.3mm) for HMS 1, and 1/8in for HMS 2 –
consignments have a high density. Both also have defined maximum
dimensions (usually 60in x 24in), and should be prepared to
facilitate handling and charging to a furnace.
This density, sizing and preparation makes for efficient furnace
operation by minimising the time to charge enough scrap for a full
melt. In contrast, thin mixed scrap greatly increases charging
time, cutting furnace productivity.