Turbine casing comprising a low-stress connection flange, and exhaust-gas turbine having such a turbine casing

A turbine casing for an exhaust-gas turbine, the turbine casing having a connection flange for bearing-casing-side attachment to a bearing casing, wherein the connection flange defines casing-connection bores that are mutually spaced in a circumferential direction wherein the connection flange further comprises:

• a clamping edge including a depression bottom, the depression bottom extending in the circumferential direction over an entire circumference of the connection flange and positioned in a radially inner edge region of the clamping edge, the depression bottom defining an annular depression and material recesses, wherein the material recesses have a depth into the depression bottom greater than a depth of the annular depression, and wherein the material recesses are positioned between mutually adjacent casing-connection bores, the material recesses oriented radially inward toward a central longitudinal axis of the turbine casing and oriented radially inward from a main body of the turbine casing.