450HBW quenched and tempered abrasion resistant low alloy steel structural plate

Description

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

450HBW steel plate is an abrasion-resistant steel with a nominal hardness of 450 HBW. It combines good bendability and weldability. The products can be used in many different components and structures that are subject to wear. 450HBW, 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

450HBW 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 0.7 - 2.1 mm (0.028 - 0.083”). For thicknesses over 80 mm (3.15”) the preferred width is 1650 mm (64.96”).

Mechanical Properties

(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 450HBW 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.

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

Impact Properties

(1) Impact testing is performed on thicknesses ≥ 6 mm. For thicknesses between 6 - 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), %, max

The steel is grain refined.

Thickness

Tolerances 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

For plate, the tolerances conform to EN 10029 and EN 10 131 for cold rolled sheet. Tolerances conform to EN 10051 for sheet, tighter tolerances available on request.

Shape

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

Flatness

Tolerances are according to EN 10029. For sheet, the tolerances are according to EN 10051.

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). 450HBW steel plates are delivered with sheared or thermally cut edges, and thicknesses over 80 mm are delivered with mill edge as standard. 450HBW steel sheets are delivered with an as-rolled surface and milledge as standard. 450HBW steel cold rolled sheets (0.70 - 2.10 mm (0.028 - 0.083”)) are supplied as cold rolled surface.

Fabrication and Other Recommendations

Welding, bending and machining.

450HBW steel and 450HBW Tuf steel 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 °C (482 °F).

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.

Production process