Middle grate bar

A wearing cast part, the middle grate bar sits in the centre of a cross-beam grate. We supply replacements to the grate model and drawing, with material and dimensions customised to customer requirements.

Materials and standard

The grate parts are supplied from our partner factory, which has two Danish DISA casting lines and can supply the full range of grate parts. Common materials include HT200, HT250, RTSi5, RQTSi5, RTCr16, RTCr, RTCr2, RTCr5 and RTCr2Si4Mo, and the products meet the NB/T 47050-2016 technical standard.

Material selection table

Material and grade

The grade of the middle grate bar follows the temperature measured at its mounting position and the fuel burned in the boiler. The partner factory supplies it against the grate model, the drawing and the measured size of the old part. Grades we commonly supply, with advantages, temperature limits and suitable fuels, are compared in grate bar materials and temperature limits. It belongs to the Cross-beam Type Grate Spare Parts range, so the other parts of the same grate can be quoted in one order. For a quotation, send the grate model, the drawing or the measured size of the old part together with the quantity.

The heat resistance in the table is the reference upper limit for each grade; the final choice also depends on the installation position, fuel sulphur content and operating temperature.

Enquiry and supply

Please provide the grate model, drawing or old-part dimensions and the quantity; we check the material and mating dimensions, and the partner factory arranges dispatch. Dimensions can be customised, and grate bars, cross beams, side seals and other parts can be supplied together.