| 摘要 |
The invention pertains to a tube plate made of stainless steel for exhaust heat exchangers, with punched openings to hold the tube ends of a tube bundle, wherein the openings preferably have a rectangular cross section and are arranged grid-like with a web width b. Each of the openings has a shear surface with height h produced by punching, and which is adjoined by a bevel of depth t, that is manufactured before punching, and wherein the height h is roughly the same as or smaller than the web width b.
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