Cross beam

The cross beam is the load-bearing frame of a cross-beam grate surface: grate bars are mounted on it one by one, and both the weight of the combustion layer and the mechanical thrust pass through the beam to the chains on either side. We supply this part matched to the original drawings or a physical sample, cast and machined at the partner factory before dispatch.

Its load-bearing role on the grate surface

In a cross-beam grate, the cross beams form the load-bearing beams of the grate surface and the grate bars sit on them as replaceable parts; together they create a continuous combustion surface. The beams have to take high thermal load and heavy mechanical stress, and once one bends out of shape, both the seating of the grate bars and the travel of the grate suffer. When checking spares, the cross beam is usually confirmed together with connecting pins, wear plates and support parts.

Materials and heat resistance

Cross beams and grate bars usually use Cr25Ni20 (310S) cast alloy steel, medium-temperature zones can take Cr26Ni12, and structural support parts use standard carbon steel. Examples of the casting materials and heat resistance available from the partner factory are listed below:

Casting and fit accuracy

Cross beams, grate bars and all support parts go through precision casting and machining to guarantee correct fit and alignment. The product meets technical standard NB/T 47050-2016, and every item goes through material composition analysis, dimensional verification and performance testing before delivery.

Selection and spare-part matching

We can supply a complete set of cross beams, grate bars, support parts, connecting pins and wear plates, with materials and dimensions customised to customer requirements. During project execution we provide complete technical drawings, installation guidance and commissioning support.