Hardox® 450

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What is Hardox® 450?

Hardox® 450 has been setting the benchmark for quality steel for more than 30 years, for good reason. It has a solid reputation as a highly versatile, abrasion-resistant steel that also has structural properties. With an extra 50 HBW hardness over AR 400 grades, it provides additional wear resistance for an extended service life with similar toughness as an AR 400 steel. This allows for more high-performing buckets, dump bodies and other equipment that lasts longer and still can take impact forces without compromising structural integrity.

A trailer with Hardox 450 steel in the dump body, on a wet and muddy road.
Giant excavator releasing an enormous rock up in the air. The bucket’s edges are made in Hardox® 450 steel.

Hardox® 450 leaves S235 and S355 steel behind

Hardox® 450 consistently outperforms mild steel, whether it’s S235, S355, A36, grade 50, A514, SS400, S45C or any AR 400 grade. That’s why it’s the industry standard for hard-wearing, hard-working equipment. Mild steel simply doesn’t have the strength to enable modern excavators or other machines to perform at their full potential. Premature maintenance or repairs just because the business end of your equipment isn’t hard or strong enough is neither convenient nor cost-effective. When switching to Hardox® 450 from such steels, expect a more productive operation with less downtime.

Relative service life of Hardox® 450 compared to S355 steel in sliding wear for different abrasive materials

If you want to protect the valuable investment you made in your equipment, Hardox®450 can significantly extend its service life. Here’s how Hardox® 450 outperforms milder steels like S355 and S235 when exposed to sliding wear from different abrasive materials.

Bar chart showing how Hardox® 450 AR steel can extend equipment service life based on the type of rock.
Three drawings of Hardox® 450 wear plate being subjected to different stresses.

Hardox® 450 is more than a number

Comparing wear steels on the basis of hardness only is not enough. Hardox® 450 is different than your average AR 450 steel. It starts already in the quenching and tempering process at the steel mill, giving Hardox® 450 its guaranteed through-thickness hardness. Your advantage? Outstanding, dependable and predictable performance, throughout the service life of your equipment.

Additionally, Hardox® 450 comes with guarantees for thickness, flatness, and bending performance. These properties ensure predictable processing in the workshop. Every plate you work will behave just like the one before it. There won’t be any unexpected surprises – great news for every production manager.

Ready to step up a grade from AR450?

Hardox® 450 has been state-of-the-art in wear steel for a long time, and it will stick around. That shouldn’t stop you from exploring newer grades of Hardox® steel. Hardox® 500 Tuf has taken the toughness of Hardox® 450 and added 50 HBW in extra hardness. May not sound much but the effect on wear life is impressive. Calculations with the Hardox® WearCalc app show that Hardox® 500 Tuf can increase wear life compared to Hardox® 450 by close to 50%.

Bar chart showing that an upgrade to Hardox® 500 Tuf steel extends service life by 50 percent compared with Hardox® 450.

See how Hardox® 450 brings benefits to OEMs and end users

Find your closest Hardox® 450 steel supplier

Local supplies of Hardox® 450 are available anywhere in the world. In less than 48 hours, you can get the most popular Hardox® grades and dimensions from an SSAB mill or local SSAB stocks. Hardox® Wearparts, our global network of wear service centers, manufactures wear parts from Hardox® 450 and other Hardox® grades.

Wear plates of Hardox® 450 steel being delivered to a workshop for fabrication. Black and white image.
A truck with body made in Hardox® 450 steel, travelling past a job site with a load of abrasive gravel and rocks.

Where is Hardox® 450 used?

If we were to list industries where Hardox® 450 isn’t used, it would be a very short list. Wear is a challenge in most industries, and Hardox® 450 has been the go-to solution to meet these challenges. Here are some machines and equipment that use Hardox® 450: Concrete mixers, snow blowers, roll-off containers, excavator and front loader buckets, grapples, shears, garbage trucks, dump trailer bodies, concrete drums, asphalt rollers, potato harvesters, recycling tools, crushers, chutes – just to mention a few.

General Product Description

The most popular abrasion-resistant steel with excellent structural properties.

Hardox® 450 is an abrasion-resistant steel with a nominal hardness of 450 HBW. Hardox® 450 combines good bendability and weldability. The products can be used in many different components and structures that are subject to wear. Hardox® 450, with an extra 50 Brinell hardness over our 400 grade, provides better dent and abrasion resistance as well as longer wear life, so you can achieve even greater savings.

Dimension Range

Hardox® 450 is available in thicknesses of 3.2 - 130 mm (1/8 - 5.12") as plate, as sheet in thicknesses 2.0 - 8.0 mm (0.079 - 0.315") and as CR sheet in thicknesses 0.8 - 2.1 mm (0.031 - 0.083"). For thicknesses over 80 mm (3.15") the preferred width is 1650 mm (64.96"). More detailed information on dimensions is provided in the dimension program.

A matrix showing the available dimensions of Hardox® 450 wear steel.

Mechanical Properties

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    Product Thickness
    Hardness 1)
    Typical yield strength
    (MPaksi), not guaranteed
    Hardox® 450 CR sheet 0.8 - 2.100.031 - 0.083 425 - 475 2) 1250181
    Hardox® 450 sheet 2.0 - 8.00.079 - 0.315 425 - 475 2) 1250181
    Hardox® 450 plate 3.2 - 80.00.126 - 3.150 425 - 475 1250181
    Hardox® 450 plate 80.1 - 103.03.154 - 4.055 410 - 475 1250181
    Hardox® 450 plate 103.1 - 130.04.059 - 5.118 390 - 475 1250181
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      1) Brinell hardness, HBW, according to EN ISO 6506-1, on a milled surface 0.5 – 3 mm below surface. At least one test specimen per heat and 40 tons.

      2) Hardness test is not performed or guaranteed for Hardox® products with thicknesses < 2.5 mm. The tabulated hardness values for thickness < 2.5 mm is a conversion from the tensile strength. For more information please see the datasheet 2067- Hardness conversion of thin Hardox® wear sheet.

      The nominal thickness of supplied plates will not deviate more than +/- 15 mm from the thickness of the test specimen used for hardness testing.

      Hardox® wear plate is through-hardened. Minimum core hardness is 90 % of the guaranteed minimum surface hardness.

      Impact Properties

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        Product Longitudinal test, typical impact energy,
        Charpy V 10x10 mm test specimen
        Transverse test, guaranteed impact energy,
        Charpy V 10x10 mm test specimen 1)
        Hardox® 450 sheet & plate 50 J / -40 °C37 ft-lbs / -40 °F
        Hardox® 450 Tuf 27 J / -20 °C 2)20 ft-lbs / -4 °F 2)
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          1) Impact testing is performed on thicknesses ≥ 6 mm for plate and ≥ 3 mm for sheet. For thicknesses between 3 and 11.9 mm, sub-size Charpy V-specimens are used. The specified minimum value is proportional to the cross-sectional area of the test specimen, compared to a full-size specimen (10 x 10 mm). Impact testing according to ISO EN 148 per heat and thickness group. Average of three tests

          2) Single value minimum 70% of specified average.

          Chemical Composition (heat analysis)

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            Product type C *)
            (max %)
            Si *)
            (max %)
            (max %)
            (max %)
            (max %)
            (max %)
            (max %)
            (max %)
            (max %)
            CR sheet 0.19 0.30 1.50 0.020 0.005 0.10 0.10 0.05 0.004
            Sheet & plate 0.26 0.70 1.60 0.025 0.010 1.40 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 type CR sheet Sheet Plate Plate Plate Plate Plate Plate
                Thickness (mmin) 0.8 - 2.100.031 - 0.083 2.0 - 8.00.79 - 0.315 3.2 - 4.90.126 - 0.193 5.0 - 9.90.197 - 0.390 10.0 - 19.90.394 - 0.783 20.0 - 39.90.787 - 1.571 40.0 - 80.01.575 - 3.150 80.1 - 130.03.154 - 5.118
                Max CET(CEV) 0.36 (0.49) 0.36 (0.49) 0.37 (0.48) 0.38 (0.49) 0.39 (0.52) 0.41 (0.60) 0.43 (0.74) 0.41 (0.67)
                Typ CET(CEV) 0.32 (0.46) 0.33 (0.47) 0.33 (0.46) 0.33 (0.45) 0.36 (0.48) 0.38 (0.56) 0.40 (0.71) 0.39 (0.64)
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                  More details are given in SSAB’s brochure Hardox® Guarantees.


                  Tolerances according to Hardox® Thickness Guarantees. Hardox® Guarantees meet the requirements of EN 10029 Class A for plate. For sheet, the guarantees meet the requirements of 1/2 EN 10051 and EN 10131 for cold rolled sheet products.

                  Length and Width

                  According to SSAB’s dimension program. For plate, the tolerances are according to SSAB´s mill edge standard or tolerances that conform to EN 10029 and EN 10131 for cold rolled sheet. Tolerances conform to EN 10051 for sheet, tighter tolerances available on request.


                  Tolerances according to EN 10029 for plate, EN 10051 for sheet and EN 10131 for cold rolled sheet


                  Tolerances are according to Hardox Flatness® Guarantees Class D for plate, which are more restrictive than EN 10029. For sheet, the tolerances are according to Hardox® Flatness Guarantees Class A, that offer narrower tolerances compared to EN 10051. Cold rolled sheet tolerances are according to Hardox® Flatness Guarantees Class B.

                  Surface Properties

                  According to EN 10163-2 Class A, Subclass 1.

                  Delivery Conditions

                  The delivery condition is Q or QT (Quenched or Quenched and Tempered). Hardox® 450 plates are delivered with sheared or thermally cut edges, and thicknesses over 80 mm are delivered with mill edge as standard. Hardox® 450 sheets are delivered with an as-rolled surface and mill edge as standard. Hardox® 450 cold rolled sheets (0.80 - 2.10 mm (0.031 - 0.083")) are supplied as cold rolled surface. 

                  Delivery requirements can be found in SSAB’s brochure Hardox® Guarantees or www.ssab.com.

                  Fabrication and Other Recommendations

                  Welding, bending and machining

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

                  Bendability for plate are according to Hardox® Bending Guarantees Class F. For sheet, the bendability are according to Hardox® Bending Guarantees Class C for cold rolled sheets, and Class B for sheet.

                  Hardox® 450 and Hardox® 450 Tuf are not intended for further heat treatment. Mechanical properties are achieved by quenching and when necessary, by means of subsequent tempering. The properties of the delivery condition cannot be retained after exposure to temperatures in excess of 250 oC (482 oF).

                  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.