Hardox 450 steel working hard in an excavator bucket that is digging up abrasive rocks.

Hardox® 450

Hardox® 450 is probably the world’s most recognized wear-resistant steel, with tight tolerances and excellent structural properties, only from SSAB. With a nominal hardness of 450 HBW, Hardox® 450 combines good bendability and excellent weldability. The extra 50 HBW hardness over our Hardox® 400 grade provides better dent and abrasion resistance as well as longer wear life. Or you can use the additional hardness to reduce plate thickness and get lighter equipment.

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What is Hardox® 450?

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Hardox® 450 leaves S235 and S355 steel behind

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

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Hardox® 450 is more than a number

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Ready to step up a grade from AR450?

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

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Find your closest Hardox® 450 steel supplier

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Dimension Range

Mechanical Properties

Product
Product
Hardox® 450 CR sheet
Thickness
(mminches)
0.8 - 2.100.031 - 0.083
Hardness 1)
(HBW)
425 - 475 2)
Typical yield strength
(MPaksi), not guaranteed
1250181
Product
Product
Hardox® 450 sheet
Thickness
(mminches)
2.0 - 8.00.079 - 0.315
Hardness 1)
(HBW)
425 - 475
Typical yield strength
(MPaksi), not guaranteed
1250181
Product
Product
Hardox® 450 plate
Thickness
(mminches)
3.2 - 80.00.126 - 3.150
Hardness 1)
(HBW)
425 - 475
Typical yield strength
(MPaksi), not guaranteed
1250181
Product
Product
Hardox® 450 plate
Thickness
(mminches)
80.1 - 103.03.154 - 4.055
Hardness 1)
(HBW)
410 - 475
Typical yield strength
(MPaksi), not guaranteed
1250181
Product
Product
Hardox® 450 plate
Thickness
(mminches)
103.1 - 130.04.059 - 5.118
Hardness 1)
(HBW)
390 - 475
Typical yield strength
(MPaksi), not guaranteed
1250181

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® 450 cold rolled material. The hardness interval is a conversion from the tensile strength.

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

Impact Properties

Product
Product
Hardox® 450 sheet & plate
Longitudinal test, typical impact energy,
Charpy V 10x10 mm test specimen
50 J / -40 °C37 ft-lbs / -40 °F
Min impact energy for transversal testing,
Charpy V 10x10 mm test specimen 1)
Product
Product
Hardox® 450 Tuf
Longitudinal test, typical impact energy,
Charpy V 10x10 mm test specimen
Min impact energy for transversal testing,
Charpy V 10x10 mm test specimen 1)
27 J / -20 °C 2)20 ft-lbs / -4 °F 2)

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)

Product type
Product type
CR sheet
C *)
(max %)
0.19
Si *)
(max %)
0.30
Mn*)
(max %)
1.50
P
(max %)
0.020
S
(max %)
0.005
Cr*)
(max %)
0.10
Ni*)
(max %)
0.10
Mo*)
(max %)
0.05
B*)
(max %)
0.004
Product type
Product type
Sheet & plate
C *)
(max %)
0.26
Si *)
(max %)
0.70
Mn*)
(max %)
1.60
P
(max %)
0.025
S
(max %)
0.010
Cr*)
(max %)
1.40
Ni*)
(max %)
1.50
Mo*)
(max %)
0.60
B*)
(max %)
0.005

The steel is grain refined. *) Intentional alloying elements.

 

Carbon Equivalent CET(CEV)

Product type
Product type
Thickness (mminches)
CR sheet
0.8 - 2.100.031 - 0.083
Sheet
2.0 - 8.00.79 - 0.315
Plate
3.2 - 4.90.126 - 0.193
Plate
5.0 - 9.90.197 - 0.390
Plate
10.0 - 19.90.394 - 0.783
Plate
20.0 - 39.90.787 - 1.571
Plate
40.0 - 80.01.575 - 3.150
Plate
80.1 - 130.03.154 - 5.118
Product type
Product type
Max CET(CEV)
CR sheet
0.36 (0.49)
Sheet
0.35 (0.48)
Plate
0.37 (0.48)
Plate
0.38 (0.49)
Plate
0.39 (0.52)
Plate
0.41 (0.60)
Plate
0.43 (0.74)
Plate
0.41 (0.67)
Product type
Product type
Typ CET(CEV)
CR sheet
0.32 (0.41)
Sheet
0.26 (0.39)
Plate
0.29 (0.39)
Plate
0.33 (0.45)
Plate
0.36 (0.48)
Plate
0.38 (0.56)
Plate
0.38 (0.61)
Plate
0.39 (0.64)
CET and CEV formula

Thickness

Tolerances according to Hardox® Thickness Guarantees. Hardox® Guarantees meet the requirements of EN 10 029 Class A for plate. For sheet, the guarantees meet the requirements of 1/2 EN 10 051 and EN 10 131 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 10 029 and EN 10 131 for cold rolled sheet. Tolerances conform to EN 10 051 for sheet, tighter tolerances available on request.

 

Shape

Tolerances according to EN 10 029 for plate, EN 10 051 for sheet and EN 10 131 for cold rolled sheet

 

Flatness

Tolerances are according to Hardox Flatness® Guarantees Class D for plate, which are more restrictive than EN 10 029. For sheet, the tolerances are according to Hardox® Flatness Guarantees Class A, that offer narrower tolerances compared to EN 10 051. 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

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, [email protected].