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    Material Unibar 700-2

    Unibar 700-2

    Grade Colour Code: Dark Blue
    SG/Nodular Iron

    Comparative Specification:

    • GGG 70 according to DIN EN 1693 (1985)
    • EN-GJS-700-2C according to DIN EN 16482

    Unibar 700-2 offers improved wear resistance, increased strength with superior heat-treatment response, compared to other SG/Nodular grades, while still possessing reasonable machinability with an excellent surface finish. 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
    mm
    Tensile Strength
    N/mm²
    0.2% 
    Proof Stress
    Elongation % Hardness
    (BHN)
    Matrix
    20 < D ≤ 60 700 420 2 210 - 305 Pearlitic-Ferritic
      60 < D ≤ 120 700 400 2
    120 < D ≤ 400 650 380 1
    400 < D ≤ 700 660 380 1

    Microstructure

    Unibar 700-2 contains type V & VI nodular (spheroidal) graphite in accordance with ISO 945. The rim is predominantly pearlitic. The core matrix is greater than 70% pearlite with some ferrite. Chill carbides will be less than 5%, well dispersed.

    Heat Treat Response

    Unibar 700-2 is more responsive to heat treatment than Unibar 600-3 and the predominantly ferritic grades, in particular hardening and tempering, and is ideally suitable for austempering, this along with all conventional surface hardening techniques.

    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 (SG/Nodular)

    Round
    (As-Cast Diameter mm)
    Ovality Allowances
    mm
    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)

    Section
    (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.

    Applications

    Unibar 700-2 is used specifically for different applications. It is suitable for both, the automotive industry, the machinery and machine tool section and for the steel machinery. Furthermore, it is often used for rotors in the hydraulic and pneumatic sector as well as for pumps and compressors.

    For the mentioned applications Unibar 700-2 is a favourable alternative for other materials, such as steel, aluminum or sand cast.

    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 700-2 is available in your required size, please have a look at our online stock list. Register and keep track of the currently available quantities.