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Material Unibar 200

Unibar 200

Grade Colour Code: Orange 
Grey/Flake Iron

Comparative Specification:

  • EN-GJL-200C according to DIN EN 16482
  • EN-GJL-200 according to BS EN 1561 (2011)

Unibar 200 is a fully ferritic iron and the softest grade in the Unibar portfolio, offering exceptional machinability and excellent surface finish, but limited strength and wear resistance. Noise, vibration damping and thermal conductivity are excellent in this grade.

Profile and Size Range

Standard cut length of our cast iron products is 3080mm, other lengths available on request.

Round Square Rectangle Special Profiles
25mm – 700mm 25mm x 25mm – 550mm x 550mm Up to 780mm x 550mm Sizes and profiles to customer design available on request

Mechanical Properties

Material Section mm Tensile Strength
N/mm²
Hardness
(BHN)
Matrix
20 < D ≤ 50 155 120 - 200 Ferritic
  50 < D ≤ 100 140
100 < D ≤ 200 125
200 < D ≤ 400 115
400 < D ≤ 700 115

Microstructure

Contains type ‘A’ graphite flakes in accordance to ISO 945. The matrix structure of Unibar 200 is predominantly ferritic with less than 10% pearlite throughout. The rim contains fine type ‘D’ and ‘E’ interdendritic graphite.

Heat Treat Response

Unibar 200 is not recommended for hardening or heat treatment applications.

Ancillary Processes

Both, our foundries and our local distribution centres offer various services to deliver pre-machined products to our customers. Pre-machined Unibar material will save valuable production time, improve the cost effectiveness and eliminate waste in your own production, allowing you to focus on the key design elements of your products.

Cutting

Cutting to specified length in quantities as little as one piece to large volumes, prepared to meet the requirement of your automatic machining systems.

Turning

Turning of round bars to required size to meet specific requirements and to minimise the machining operations of our customers. Unibar turned therefore comes with a standard tolerance of +1mm, although after consultation we can offer alternatives to suit all of our customers‘ requirements.

Milling

Single and duplex machines offer milling of square and rectangular bars to specified dimensions and agreed tolerances. We can offer our customers milling on either four or six faces for further processing.

Peeling

In the case of machined Unibar with diameters of less than 110mm as an alternative to Unibar turned we can offer Unibar peeled by peeling off the oxidised surface layer of the cast bar. As these are smaller dimensions and involve a different machining process, the tolerances offered are more precise, for example h11.

Boring

Longitudinal boring as deep as 1000mm is possible by using single head boring and trepanning machines. Unibar tubes can be supplied with the exterior surface as-cast or machined. These two variants can be complemented by a wide selection of internal measurements, which can range from 30mm to 500mm.

Dimensional Tolerances (Grey/Flake)

Round
(As-Cast Diameter mm)
Ovality Allowances
mm
Max. Swell Allowances mm
20 < (D OR B) ≤ 50 - 5
  50 < (D OR B) ≤ 100 1 7
100 < (D OR B) ≤ 200 2 10
200 < (D OR B) ≤ 300 4 12
300 < (D OR B) ≤ 400 5 15
> 400 By agreement By agreement

Machining Allowances (Grey/Flake)

Section
(D Diameter, B Width)
Min. Machining Allowance mm (per side)
Round Square/Rectangle
20 < (D OR B) ≤ 50 2 2.5
  50 < (D OR B) ≤ 100 3 3.5
100 < (D OR B) ≤ 200 4 4.5
200 < (D OR B) ≤ 300 6 6.5
300 < (D OR B) ≤ 400 7 7.5
400 < (D OR B) ≤ 500 9 9.5
500 < (D OR B) ≤ 650 11 11.5

For rectangular bars the width is the longer dimension of the cross section. Machining allowances of our continuously cast iron bars can be adjusted to meet customer requirements, subject to discussion, prior agreement and special order. For further information please contact our nearest distribution centre.

Applications

Our flake iron Unibar 200 is particularly suitable for the machinery and machine tool industry as well as for the processing within the glass industry.

Because of its excellent mechanical properties Unibar 200 has a lot of advantages to compete with other materials such as steel or sand casting.

Advantages:

  • Improved machinability
  • Excellent surface finish
  • 10% weight reduction against steel
  • Excellent vibration damping
  • Faster turning and grinding times
  • Finer grain structure than with sand casting
  • Absence of sand inclusions or cast dimensional problems
  • Elimination of costly patterns
  • Availability from stock

Do you need any further information about our continuously cast iron products? You will find the appropriate data sheets as well as our technical manual in our download section.

To find out whether Unibar 200 is available in your required size, please have a look at our online stock list. Register and keep track of the currently available quantities.