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Material Unibar 600-3

Unibar 600-3

Grade Colour Code: Light Blue
SG/Nodular Iron

Comparative Specification:

  • EN-GJS-600-3C according to DIN EN 16482
  • EN-GJS-600-3 according to BS EN 1563 (2011)

Unibar 600-3 offers reasonable machinability and excellent surface finish, combined with high wear resistance and increased strength, heat treatment response is good compared to Unibar 400-15 and Unibar 500-7. Noise and vibration damping are good 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
Tensile Strength
Proof Stress
Elongation % Hardness
20 < D ≤ 60 600 370 3 200 - 290 Pearlitic-Ferritic
  60 < D ≤ 120 600 360 2
120 < D ≤ 400 550 340 1
400 < D ≤ 700 550 340 1


Unibar 600-3 contains type V & VI noular (spheroidal) graphite in accordance with ISO 945. The rim is predominantly pearlitic. The core matrix is greater than 50% pearlite with some ferrite. Chill carbides will be less than 5%, well dispersed.

Heat Treat Response

Unibar 600-3 is more responsive to heat treatment than the predominantly ferritic grades, in particular hardening and tempering, this along with all conventional surface hardening techniques. And potential hardness of 50 Rc on the surface and increased depth of hardness through the section.

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


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.


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.


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.


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 (SG/Nodular)

(As-Cast Diameter mm)
Ovality Allowances
Max. Swell Allowances mm
20 < (D OR B) ≤ 50 - 5
  50 < (D OR B) ≤ 100 2 7
100 < (D OR B) ≤ 200 3 10
200 < (D OR B) ≤ 300 4 12
300 < (D OR B) ≤ 400 5 15
> 400 By agreement By agreement

Machining Allowances (SG/Nodular)

(D Diameter, B Width)
Min. Machining Allowance mm (per side)
Round Square/Rectangle
20 < (D OR B) ≤ 50 3 3.5
  50 < (D OR B) ≤ 100 4 4.5
100 < (D OR B) ≤ 200 5 5.5
200 < (D OR B) ≤ 300 7 7.5
300 < (D OR B) ≤ 400 8 8.5
400 < (D OR B) ≤ 500 10 10.5
500 < (D OR B) ≤ 650 12 12.5

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.


Unibar 600-3 is an ideal material grade for a wide range of applications. It is used not only in hydraulic and pneumatic applications, in the automotive industry, but also in the machinery and machine tool section. Furthermore, Unibar 600-3 is also used in the production of pumps and compressors, for the steel machinery, in the oil and gas industry as well as in applications for renewable energies.

For many market sectors, our spheroidal cast iron Unibar 600-3 is the ideal alternative for other materials, such as steel, aluminum or the traditional sand cast, due to its structural and mechanical 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 600-3 is available in your required size, please have a look at our online stock list. Register and keep track of the currently available quantities.