HR (hot rolled) trimming is the scrap metal produced from the slitting machines which process large coils to different sizes. When new HR coils are processed, they are cut to customer specifications and the off cut from the cutting die is know as HR trimming scrap. It is classed as a very high quality grade of bundle scrap metal. It is recycled and melted by steel manufacturing furnaces to produce new steel or the trimmed coils are used in cold drawing processes.
This scrap metal also has high strength and good ductility, making it durable and extremely light weight. HR Trimming is a type of scrap metal which is very clean, free from impurities and attachments, making it a excellent choice for electric arc furnaces to melt and make new steel.
HR coils are stored in a circular wound reel, so when they are slit, the HR trimming also reverts to a coil shape.
The thickness and width of the HR trimming scrap is very important. The ideal thickness of HR trimming should be around 2-6mm and the width should be in the range of 8-20mm. The profile should not be round or oval, but flat.
To sum up the ideal specification :
– Well rolled, not scattered/loose material
– Thickness 2-6mm
– Width 8-20mm
– Free of any coating
These properties are important so that the bundle is easily manageable for the melting furnace or to be used in the manufacture of wire rod and nails (cold drawn manufacturing).
When HR trimming is exported, it is usually loaded into 20ft containers. Due to its dense nature and if the coils are tightly wound, the average loading weight can be around 22-25mt per container. If the coils are tightly wound even when loaded and transported the HR trimming will stay compact and can be easily unloaded by the importer in Pakistan or India.