Rolls for Metal Rolling

"Reliable technologies backed by history"
Support provided for the entire process from raw materials to finishing

Sumitomo Rolls
The SHI Group succeeded in the manufacture of ductile rolls for the first time in Japan in 1953. Since then, the SHI Group has secured and retained the strong position of the top manufacturer of ductile rolls. Current lines of products include cast iron varieties (ductile and glen cast iron), steel roll varieties (adamite and graphite steel), as well as high speed tool steel (HSS) rolls and osprey rolls, which are made available due to improved performance of the rolling facilities, energy conservation, labor savings and improved productivity, in order to respond to a diverse range of our customers' requirements. The SHI Group will continue to develop products that are suitable for the needs of the users.


Special heat treated strong rolls: "Sip Roll"

A special heat treatment known as the "SIP" or the "Sumitomo Improvement Penetration" arranges the upper layer constituents of the roll surface in a precise manner, which not only improves the mass effect but also raises the overall strength and dramatically improves the bending durability. This is a roll with significant improvement of surface roughness resistance and thermal crack

An example of mechanical characteristics

  N treatment SIP treatment
Hardness (Hs) 45±3 45/50
Tension (kg/mm2) 64 74
Bearing force (kg/mm2) 49 58
Elongation (%) 3.5 3.1
Impact value (kg/cm) 0.9 1.6
Fatigue strength (kg/mm2) 19 24
Fracture toughness value (KIc) 185 203

Hardness distribution

The SHI Group's High Speed Tool Steel (HSS) Rolls: "STZ"

These are rolls that have properties that are in between the high speed tool steel materials and the conventional materials such as cast iron materials (ductile cast iron) and cast steel materials (adamite). These are rolls with material characteristics that appear to contradict each other, such as thermal crack resistance, toughness, wear resistance and surface roughness resistance, making it capable of responding to a variety of quality requirements as a raw material and through the entire process leading up to the finishing stand.

Image diagram of materials

Friction test result

The SHI Group's Osprey Rolls

The osprey preform process is a spray casting method, which was developed by Osprey Metals of the United Kingdom. The SHI Group was the first in the world to succeed in commercialization in 1987 and started the sale of High Speed Tool Steel rolls. Semi dissolved and semi coagulated microparticles are sprayed using inert gas and consecutively stacked on top of a collector. They then rapidly coagulate to form a uniform and microscopic microstructure to result in a material that shows the same mechanical properties as those made by powder metallurgy.
The High Speed Tool Steel osprey rolls have superior friction resistance and surface roughness resistance with the thermal crack resistance also significantly improved in recent years. They are used as intermediate and finishing rolls for steel bars, wiring materials and rolling steel.

Schematic diagram of the Osprey method

Osprey microstructure

Material lines

Type Roll material Material code Hardness (Hsc)
Ductile rolls Special heat treated ductile SIP-3
High alloy ductile 73A
Glen rolls High alloy glen 64 60-75
Composite glen 64W 65-80
Adamite rolls Special heat treated adamite SIP-2A
Special heat treated graphite steel SIP-2G
Composite adamite SIP-5AW 55-65
Forged adamite SIP-X 40-65
High Speed Tool Steel rolls Composite High Speed Tool Steel STZ-2W
Osprey rolls Osprey SOX-30 85-95

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