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SG Grain
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SG Grain Rolls contain only a relatively small amount of iron carbide in their microstructure but with a significant quantity of graphite which is present in a spheroidal form.
The structure of the matrix ranges from pearlite in the lower alloyed grades to acicular phases in the higher alloyed and heat treated grades. Hardness penetration is excellent so that SG Grain can be used for section rolls of all types.
Because of the spheroidal form of the graphite, the strength of the SG Grain is high and the rolls can be used in relatively high duty applications. Acicular grades particularly, combine high strength, toughness and wear resistance and have been used as an alternative to forged steel in a number of applications with a substantial improvement in performance.
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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 |
| Billets |
2 & 3 High |
Roughing |
| Heavy Sections & Rails |
2 & 3 High |
All Positions |
| Beams |
Universal |
All Horizontal Rolls |
| Tube |
Pilger |
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| Medium Section |
Cogging |
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Typical Mechanical Properties
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N/mm2 |
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| Property |
Pearlitic |
Acicular |
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Typical Hardness Gradient
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Micrograph x 500
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Typical Analysis
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| Code |
Leeb E |
Shore C |
C |
Si |
Mn |
Ni |
Cr |
Mo |
| SGAGA |
495-560 |
35-45 |
2.8/3.4 |
1.0/1.8 |
0.4/0.8 |
1.5/2.5 |
0.2/0.8 |
0.1/0.3 |
| SGAGD |
525-620 |
40-55 |
3.2/3.6 |
1.2/1.8 |
0.4/0.8 |
2.0/5.0 |
0.1/0.5 |
0.7/1.2 |
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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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