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XAR-300

Scope

This material specification applies to normalised or normalised rolled plates in thicknesses up to 50mm made of the wear resistant special structural steel XAR®300.

Application

The steel may be used at the discretion of the purchaser for wear-exposed structures, e.g. excavating, mining and earth-moving machinery, truck dump bodies, conveying, crushing and pulverizing equipment, scrap presses and other machinery.

The processing and application techniques as a whole are of fundamental importance for the successful use of the products fabricated of this steel.  The processor/fabricator must assure himself, that his design and work methods are appropriate for the material, are state-of-the-art and are suitable for the envisaged purpose.

The selection of the material is left up to the purchaser.



Chemical Composition (heat analysis, %)

Steel grade

C

Si

Mn

P

S

Cr

Mo

B

 

XAR®300

max.

0.21

max.

0.65

max.

1.50

max.

0.025

max.

0.025

max.

1.20

max.

0.30

max.

0.005

The steel has a fine-grained microstructure.  Nitrogen is absorbed to form nitrides.

Delivery Condition: N (normalised)

Hardness: at room temperature in the delivery condition: 270 - 340HB.

The Brinell hardness shall be determined in accordance with ISO 6506.

Number of Tests

Unless otherwise agreed upon in the order, the Brinell hardness shall be determined from each heat.  The hardness shall be measured roughly 1mm below the surface.

General Processing Information

Prior to any processing, it is advisable to make use of the information available from the steel producer in order to draw on that experience for the processing.  The following information can deal with only a few essential points.  The recommendations given in STAHL-EISEN-Werkstoffblatt 088 (Weldable fine-grained structural steels, guidelines for processing, in particular for welding) correspondingly apply to this steel as well.

Recommendations for welding are also given in EN 1011 part 1 and part 2 – Welding, Recommendation for welding of metallic materials-.

It is left to the discretion of the processor/fabricator to decide which of the familiar precautions must be adopted to avoid cracking during thermal cutting and welding under the prevailing construction and fabrication conditions.

Cold Forming

The products made of this steel are suitable for cold bending provided, that consideration is given to the high hardness.  The formability of steel decreases with increasing hardness.  This has to be kept in mind when forming.  The forming must take place at a slow and steady rate, the cut edges must be deburred and the plates heated, if necessary, prior to forming

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