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Alloy Cast Steel
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These steels consist of lower carbon materials with some alloying, especially chromium. This range of rolls is capable of a higher strength and wear resistance than is possible with lower alloy steels and the higher carbon grades in particular are capable of good surface finish.
The rolls are supplied with a carbon content of up to 1.4% and are heat treated to give a hardness which is normally between 30o and 45o Shore C.
The lower carbon grades will have a structure consisting of ferrite and fine pearlite which, as the carbon content is raised, changes first to a fully pearlitic structure and then to one containing free carbide in a matrix of fine pearlite for the highest carbon materials.
Alloy cast steel can be used in heavy duty applications such as slabbing, blooming and heavy section mills but the improved wear resistance of the high carbon grades makes them suitable for use in medium section mills as well as roughing rolls for flat products. The lower carbon grades are weldable under controlled conditions.
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Applications
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| Product |
Type of Mill |
Position |
| Slabs |
Universal & High Lift |
Horizontal & Vertical |
| Blooms |
2 & 3 High |
All Positions |
| Sheet |
2 & 3 High |
Roughing |
| Wide Strip |
2 & 4 High |
Roughing |
| Beam Blanks |
2 High |
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| Billets |
2 & 3 High |
Roughing |
| Billets |
Continuous |
Roughing |
| Heavy Section & Rail |
2 & 3 High |
Roughing, Intermediate & Finishing |
| Medium Section |
2 & 3 High |
Roughing |
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Typical Mechanical Properties
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N/mm2 |
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| Property |
Low Carbon |
High Carbon |
| Bending Strength |
1375 |
1080 |
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Typical Hardness Gradient
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Micrograph x 100
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Typical Analysis
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| Code |
Leeb E |
Shore C |
C |
Si |
Mn |
Ni |
Cr |
Mo |
| A1 |
465-525 |
30-40 |
0.4/0.5 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
| A2 |
465-525 |
30-40 |
0.5/0.6 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
| A3 |
485-545 |
33-43 |
0.6/0.7 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
| A4 |
485-545 |
33-43 |
0.7/0.8 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
| A5 |
485-545 |
33-43 |
0.8/1.0 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
| A6 |
495-555 |
35-45 |
1.0/1.2 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
| A7 |
495-555 |
35-45 |
1.2/1.4 |
0.3/0.8 |
0.5/1.0 |
0.5 max |
0.8/1.4 |
0.1/0.5 |
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The Davy Roll Company Limited
Registered in England, Registration No. 162966, VAT registration 172 3848 50 501.
Registered Office: PO Box 21, Coulthards Lane, Close Works, Gateshead, Tyne and Wear, NE8 3DX.
The Davy Roll Company Limited is a member of the Union Electric Steel Corporation group of companies.
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