For the outer layer of rolls, LMM GROUP used a hard, high-speed tool steel with outstanding stability even at high temperatures.

(1) Higher work efficiency
When wear resistance can be markedly improved, users can also benefit from a dramatically improved roll consumption rate. It can also significantly extend intervals between roll replacements.

(2)Lower Roll Cost per Tonne: It is estimated that the useful life of HSS rolls is almost 5-6 times more than that of conventional rolls. Meaning that over all cost of rolls consumed per tonne of finished steel produced is much less.

(3) Higher product yield
Excellent wear resistance at high temperatures stabilizes the roll profile, which contributes to improvement of product yield and product surface quality.

Because of the longer product life of the HSS Rolls, the time required for repetitive changing of roll pass is considerably reduced. This regular change of roll pass consumes a lot of time and results in production loss. In addition to production loss, this also accounts for huge energy loss. In case of re-heating furnaces the heated billets/ ingots are forced to be soaked for a longer duration resulting in waste of energy and higher billet/ingot scaling losses. In case of hot charging designs the mill production team is forced to take the heated billet to the cooling bay, thus wasting thermal energy and making the entire system inefficient and cost extensive.

(4) Zero wastage of raw material: Since the grooves/ passes of the HSS rolls have a greater resistance to wear and tear, the shapes of the grooves are stably maintained. Because of the high swelling factor of the HSS rolls with time the barrel swells in turn reducing the size of the worn out grooves. This is very helpful specially in the rolling of bars and re-bars as it give a better control of input material negative allowances.

(5) Attractive product surface
Because surface roughening from repeated thermal fatigue is controlled, you can make attractive products rolled by rolls with uniform microstructures.

(6) Equipment-friendly rolls
Proprietary combining and jointing techniques which are advanced and diverse, we can design and manufacture rolls that are ideal for your service conditions and impose minimal stress on the equipment.