Grate bar for a pelletizing or sintering machine

A grate bar for mounting in arrays of adjacent grate bars in a pallet car of a sintering or pelletizing machine, said grate bar comprising:

• an elongate crossbeam extending in a longitudinal direction of a horizontal plane, with a middle section between two opposite end sections,
• wherein said crossbeam has a generally rectangular cross-section with an upper surface for receiving bulk material, an opposite lower surface, and first and second peripheral surfaces for facing adjacent grate bars;
• wherein said crossbeam comprises two legs to vertically secure said grate bar to said pallet car;
• and
• wherein said end sections of said crossbeam comprise first interlocking means, said first interlocking means being shaped and arranged such that they cooperate with first interlocking means of grate bars of a neighbouring row of grate bars;
• thereby limiting relative translations of two neighbouring grate bars in at least a vertical orientation and a horizontal orientation,
• wherein said first interlocking means have a triangular cross-section in a horizontal plane.