Round Hardox® steel pipes and tubes
Round Hardox® steel pipes and tubes

Hardox® pipes and tubes

Abrasion-resistant steel pipes and tubes give you extreme performance and extended service life almost anywhere you have heavy wear. Despite their hardness, Hardox® pipes and tubes can be welded, cut, milled and drilled using standard workshop practices.

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    Hardox® abrasion-resistant pipes and tubes for high wear performance and long service life

    As hard and tough as our wear plate, Hardox® pipes and tubes offer outstanding performance when you need both high abrasion resistance and a lighter product. These long-lasting, abrasion-resistant steel pipes and wear-resistant steel tubes at a hardness of 400 HBW or 500 HBW can replace costly wear products like hard-faced overlay pipe and high-chrome white iron.

    Two-dimensional drawing of three steel pipes representing Hardox® pipes and tubes

    High-strength steel pipes extend service life in tough environments

    Want to extend your equipment’s service life 2, 5 or 10 times or more? Do you need abrasion-resistant steel pipes for tough materials like wet concrete, slurry, soil, gravel, sand or wet coal ash? Is your equipment used in challenging sectors like mining, cement, dredging, recycling or steel production? Or perhaps you need a tubular part that can serve as a structural component in a bucket or other piece of equipment. If so, Hardox® 400 Tube or Hardox® 500 Tube can be the right steel tube to get the job done.

    Several shiny steel tubes and pipes stacked up

    Benefits of Hardox® steel pipes and tubes

    • Can outlast mild steel pipe and tube by an average of 5 times
    • Extended service life reduces maintenance costs and unplanned stops
    • Lighter-weight constructions deliver high strength
    • Range of diameters available
    • Standard or custom pipe sizes
    • Easy installation and field repair
    • Great alternative to heavy, not weldable cast wear pipe
    • Strong and tough enough for structural applications
    A concrete pump truck with tubing made in abrasion-resistant Hardox® pipe pouring a concrete floor in an industrial building

    Typical abrasion resistant tubing and piping applications include

    • Concrete pump pipe in concrete mixers
    • Slurry pipes
    • Other industrial pipe (for ash, soil or gravel)
    • Dredging pipe and dredging equipment
    • Hard, fixed dust collection pipe
    • Agriculture, for transporting and handling corn, cereal and other products
    • Structural applications in buckets and other heavy equipment attachments
    • Applications that require greater strength, closer tolerances and a superior finish

    Steel pipes and extreme wear challenges

    When abrasive slurry is conveyed through steel pipe, its impact on the pipe’s inner surface can be devastating. It can cause severe problems for equipment in service, especially for pipe systems used to transport slurries that contain tailings or ores from mining operations. Such abrasive and erosive wear can cause some serious financial damage, too – loss of production time and expensive repairs.

    Illustration of a concrete pump truck made using Hardox pipes

    Why high-strength abrasion-resistant steel beats mild steel pipe in abrasive environments

    In transportation systems that use pipes, abrasive wear occurs when hard particles or abrasive slurry particles slide along the wall of the pipe or are forced against it. This action on the pipe wall can cause loss of material and, in extreme cases, pipe leaks or failure.

    Mild steel pipe simply cannot stand tough enough against such abrasive environments to give acceptable service life. While mild steel pipe has good strength and impact resistance, it has poor abrasion resistance compared with high-strength, abrasion-resistant steel pipe in such high-wear areas.

    What about cast wear pipe? In conveying applications, the pipes are constantly being subjected to movement due to pressure surges. Heavy, brittle cast piping is not a good option in such piping systems.

    Abrasion-resistant steel pipe like Hardox® pipes in high-strength steel give you a maintenance-friendly alternative in abrasive or tough applications. And you can use lighter pipes with thinner wall thickness. They are easier to handle and install and will maintain the strength you need.

    An screening bucket attached to an excavator that uses structural-grade Hardox® Tube steel

    Hardox® tubes save weight and last longer in Remu’s screening buckets

    Hardox® steel tubes are vital components inside the Finnish company Remu’s screening buckets. The screening is performed by rotors with blades in Hardox® 500 wear plate that are welded to a Hardox® 500 Tube. The rotors separate bigger particles or grind aggregated material into smaller particles, causing a lot of wear on the blades and the tubes.

    By upgrading from hardfaced tubes in S355 steel to Hardox® 500 Tube, Remu reduced the thickness of the tubes to save weight and get extended service life as an extra bonus.

    Pipes and tubes – what’s the difference?

    There is no technical difference between Hardox® tubes and pipes. They have the same mechanical and chemical properties and wear performance. Typically, we call them tubes when they are used in structural applications subjected to outside wear, and pipes when they are used for pumping abrasive liquids or slurries. In either case, it’s a good thing Hardox® steel is through-hardened – this means it has high wear resistance throughout, from the core outwards to the surface.

    Hardox tubes stacked with sunlight shining through

    Strength of Hardox steel tubes confirmed with pressure testing

    Hardox® round steel tubes have undergone extensive pressure testing. During testing of Hardox® 400 tubes, all dimensions could withstand a peak pressure of 60 MPa (8.70 ksi) for at least six hours. In a test of Hardox® 500 tubes, a peak pressure of 85 MPa (12.33 ksi) was achieved.

    Uniform, guaranteed properties for excellent workshop performance

    Hardox® abrasion-resistant pipes and tubes are roll formed and plasma welded prior to quenching. This guarantees that the mechanical properties in the weld are the same as in the rest of the material, resulting in a more durable steel tube or pipe.

    With their lean proprietary chemistries and outstanding cleanliness, these abrasion-resistant steel pipes and tubes have highly consistent properties. This gives you precision and efficiency in the workshop. Despite their hardness, Hardox® tubes can be welded, cut, milled and drilled using standard workshop practices.

    Hardox® 400 Tube and Hardox® 500 Tubes comply with standard EN 10210 in terms of dimension tolerances and testing.

    Download workshop guidelines for Hardox® pipes and tubes

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    Get the inside story on Hardox® pipes and tubes

    Numbers in a blue spreadsheet

    Hardox® tubes and pipes dimensional program

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    All you need to know about welding Hardox® pipes and tubes

    Dimension Range

    Hardox® Tubes are available in circular shape.

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      Product Hardox® 400 Hardox® 500
      Outer diameter (mm) 76.1 - 219.1 76.1 - 133.0
      Wall thickness (mm) 3.0 - 6.0 3.0 - 6.0
      Mill length (mm) 6000 6000
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      Comparison

        Other lengths are available upon request.

        Circular Dimensions

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          Outer diameter (mm) 3.0 mm (kg/m) 4.0 mm (kg/m) 5.0 mm (kg/m) 6.0 mm (kg/m)
          76.1 5.41 7.11 8.77 10.4
          88.9 6.36 8.38 10.4 12.3
          101.6 7.29 9.63 11.9 14.2
          108.0 7.77 10.3 12.7 15.1
          114.3 8.23 10.9 13.5 16.0
          121.0 8.73 11.5 14.3 17.0
          133.0 9.62 12.7 15.8 18.8
          139.7 13.4 16.6 19.8
          168.3 20.1 24.0
          219.1 31.5
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            Mechanical Properties

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              Product Wall Thickness
              (mm)
              Hardness
              (HBW)
              Hardox® 400 3.0 - 6.0 360 - 440
              Hardox® 500 3.0 - 6.0 470 - 530
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                Chemical Composition (heat analysis)

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                  C *)
                  (max %)
                  Si *)
                  (max %)
                  Mn*)
                  (max %)
                  P
                  (max %)
                  S
                  (max %)
                  Cr*)
                  (max %)
                  Ni*)
                  (max %)
                  Mo*)
                  (max %)
                  B*)
                  (max %)
                  0.30 0.70 1.60 0.020 0.010 1.50 1.50 0.60 0.005
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                    The steel is grain refined. *) Intentional alloying elements.

                    Carbon Equivalent CET(CEV)

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                      Product Hardox® 400 Hardox® 500
                      Wall Thickness (mm) 3.0 - 6.0 3.0 - 6.0
                      Typ CET(CEV) 0.33 (0.52) 0.41 (0.62)
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                        CET and CEV formula

                        Tolerances

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                          Characteristic Circular wear tube
                          Tolerances based on the requirements of EN 10210
                          Outside diameter (D) (1 ±1%, with a minimum of ±0.5 mm and a maximum of ±10 mm
                          Out-of-roundness 2%, when D/T ≤ 100
                          Thickness (T) ±10% when T ≤ 5 mm and ±0.5 mm when T > 5 mm
                          Straightness 0.20% of total length and 3 mm over any 1 m length
                          Mass per unit length Individual tube: ±6%
                          Standard length ≥ 6000 mm: 0/+50 mm
                          Exact length Agreed at the time of enquiry and order
                          Compare parameters

                          Select one parameter to compare

                          Comparison

                            Characteristic
                            Outside diameter (D) (1
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            ±1%, with a minimum of ±0.5 mm and a maximum of ±10 mm
                            Characteristic
                            Out-of-roundness
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            2%, when D/T ≤ 100
                            Characteristic
                            Thickness (T)
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            ±10% when T ≤ 5 mm and ±0.5 mm when T > 5 mm
                            Characteristic
                            Straightness
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            0.20% of total length and 3 mm over any 1 m length
                            Characteristic
                            Mass per unit length
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            Individual tube: ±6%
                            Characteristic
                            Standard length
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            ≥ 6000 mm: 0/+50 mm
                            Characteristic
                            Exact length
                            Circular wear tube
                            Tolerances based on the requirements of EN 10210
                            Agreed at the time of enquiry and order

                            1) All external dimensions are measured with a minimum distance from the end of the section. The distance must be a minimum of 100 mm.

                            Delivery Conditions

                            Hardox® Tubes and pipes are delivered in quenched condition except for diameters above 133 mm, which are delivered in as-rolled condition.

                            Fabrication and Other Recommendations

                            Welding, bending and machining

                            Recommendations can be found in SSABs brochures at www.hardox.com or consult Tech Support.

                            Hardox® 500 Tube and pipes has obtained its mechanical properties by quenching and after roll forming and plasma welding. The properties of the delivery condition cannot be retained after exposure to service or preheating temperatures in excess of 250ºC. Hardox® 500 Tube and pipes is not intended for further heat treatment.

                            Appropriate health and safety precautions must be taken when welding, cutting, grinding or otherwise working on this product. Grinding, especially of primer coated plates, may produce dust with a high particle concentration.