B-HARD 400/450/500

Introduction of Main Products

A Variety of Available Grades

A total of 9 grades are available: the basic series with 2 grades of hardness, and the alloy series with 4 grades, and the easy welding series with 3 grades, providing a complete product line that can meet a wide range of applications.

Basic Series

This series consists of grades produced with the main emphasis on their hardness levels, the chemical composition being basically simple while the addition of other alloying elements is restrained.

Alloy Series

This series contains alloying elements in greater quantities than the basic series. Both the prescribed hardness and low-temperature toughness are guaranteed.

Easy Welding Series

This series contains restrained contents of carbon and alloying elements. The value of CEV is lower than the standard series and the alloy series, which is good to welding

Grade and Specifications

Chemical Composition

Mechanical Properties

Wear-Resisting Property

Processing Method

Cutting methods

B-HARD can very well be cut using both cold and thermal cutting methods. The cold methods are abrasive water jet cutting, shearing, sawing or abrasive grinding, while thermal methods are oxy-fuel, plasma and laser cutting.

Shearing

Note that our setting suggestions are only general recommendations. In practice, the choice is dictated by the machine stability and the condition of the blades.

Blades: The blades should be hard and sharp, with slightly rounded edges.

Clearance: This is the most important parameter for achieving good results. The clearance between the moving and stationary blades should be increased with increasing tensile strength. Incorrect clearance will result in poor sheared surfaces and may give rise to cracking when the plate is subsequently welded or bent.

Rake angle: The larger the rake angle, the lower the shearing force, although the risk will be greater of the plate sliding sideways or the piece of plate that has been sheared off deforming (twisting). As a general rule, the rake angle should be increased when shearing high strength plate.

Shearing force: For a given rake angle, the shearing force increases linearly with increasing strength of the plate.

Oxy-fuel cutting

Preheating

Preheating prior to cutting is the best way of eliminating the risk of cut edge cracking. Preheating is most commonly applied prior to oxy-fuel cutting. The preheating temperature depends on the steel grade and the plate thickness.

Plasma cutting

Bending

The bending results are dependent on a number of factors which we have grouped here under three headings: the plate, the tools and the procedure.

Welding

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