FIELD: heat-power engineering. SUBSTANCE: stack 1 consists of many stacked plates 2 forming passages 4. At least part of plates is profiled, for example by stamping; they are provided with coats made in form of layer of enamel, for example, to protect their surfaces. Proposed stack 1 has such profiles 3 of plates 2 at which edges of plates 2 are at minimum distance 8 from each other or they are positioned with no contact. Edges of plates 2 are protected against cracking by accumulation of material of coat on them in course of manufacture. EFFECT: enhanced reliability. 13 cl, 10 dwg
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