United Cast Bar Limited
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5 August 2009
James Brand talks to Exec Digital Magazine
20 April 2009
Hannover Messe 2009
1 December 2008
New shape produced at UCB UK
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The Unibar Range of Products.
Unibar is produced in a range of sizes and grades, to both international standards as well as customer specific requirements. All grades are produced in standard Round, Square and Rectangle shapes with special shapes available through consultation with our technical departments.
Unibar is available in a range of different finishes. All UCB centres can offer various different machining capabilities, from sawn cut lengths to full 6-side milling. Consult your local UCB centre today for a definitive list of services available.
Other grades to customer specifications are available on request.
Flake Iron Grades:
Unibar 200
This is the softest of the Unibar grades, (120-200 HB) and is therefore recommended if your requirements are for good machinability with low requirements of tensile strength and resistance to wear. In addition, because of its ferritic structure, it is recommended for applications requiring good thermal conductivity.
The surface finish of Unibar 200 is, however, inferior to that of the other grades, which are harder and therefore have better structural cohesion.
Unibar 200 DatasheetUnibar 250
Unibar 250 offers a good combination of strength and wear resistance with average hardness (160-230 HB), while still possessing
reasonable machinability and excellent surface finishes.Noise and vibration damping are good in this grade.
Unibar 250 Datasheet
Unibar 300
This is one of the hardest grades, (190-260 HB,) and is therefore used when high tensile strength and/or resistance to wear is required, because of its pearlitic structure.Its surface finish is better than that of other softer qualities because of its better structural cohesion, which allows surface hardening.
Unibar 300 DatasheetUnibar 350
This is the hardest grade with the highest resistance (220-280 HB, depending on dimension).Its most important quality is the fact that the structure is also pearlitic on the outside rim (90% pearlite), and is therefore suitable for those applications in which high resistance to wear is required in the parts close to the outside of the bar.
In addition, this quality allows surface hardening. In particular, this quality with a high phosphorus content (0.3/0.6%) is recommended when a higher resistance to wear is required than that provided by a fully pearlitic structure, as is the case with valve guides, etc.
The very hard Unibar 350 (HB-250/310), obtained using fine graphite (ID/IE) in the centre of the bar as well, constitutes one of the highest values in terms of cohesion and resistance.
Unibar 350 DatasheetSpheroidal Iron Grades:
Unibar 400-15
Unibar 400-15 has a ferritic structure, obtained via heat treatment (130-190 HB), and is therefore used when machinability and a good surface finish are the required characteristics.Because of its ferritic structure it is recommended for uses requiring high heat and/or electric conductivity, as well as good magnetic permeability.
Unibar 400-15 possesses high ductility, as illustrated by its high percentage of elongation.
Unibar 400-15 DatasheetUnibar 500-7
Unibar 500-7 (170-240 HB) has a better resistance to wear than Unibar 400-15 because of its pearlitic-ferritic structure, and is therefore recommended for applications in which good machinability and surface finish are required, as well as minimal friction with other parts and/or materials. The values of hardness vary according to the dimensions of the bar, producing a maximum of 240 HB (for pearlitic structures of 15/20%). This means that UUnibar 500-7 also complies with the mechanical characteristics required and the values of hardness of Unibar 400-15 and Unibar 500-7.
Subject to special order specifications certain dimensions can be supplied with maximum hardness of 190 HB, it being necessary to anneal smaller dimensions (Unibar 400-15) in order to reach this hardness; and given that, due to its partially pearlitic structure (20%), the maximum hardness can reach 230/240 HB.
Unibar 500-7 DatasheetUnibar 600-3
Unibar 600-3 has a structure that is predominantly pearlitic (>50%) in the core, which makes it specially recommended for applications requiring high resistance to wear and maximum strength.The average hardness values fall within the range 200-260 HB.
Unibar 600-3 DatasheetUnibar 700-2
Unibar 700-2 possesses a pearlitic structure, including the periphery, with percentages of 20-30% of ferrite in the core.Resistance to wear, tensile stress and elastic limit have maximum values corresponding to hardness 220-300 HB.
Unibar 700-2 Datasheet