Creep and Stress-Rupture Behavior of Internally Pressurized Tubes Made from Austenitic Stainless Steel X10 NiCrMoTiB 15 15 (Material No. 1.4970, Melt 8-22075).

摘要

Creep and stress-rupture tests have been performed at 600, 650, 700, and 750 exp 0 C on tubes with two different thermal-mechanical treatments made from the austenitic stainless steel X10 NiCrMoTiB 15 15 (Material-No. 1.4970, Chg. 8-22075). The tubes with the SNR 300, MK-II dimensions were loaded by internal pressure, and the creep strain was measured continuously. The results are presented in form of creep curves, stress-time-to-rupture curves, and curves for a creep limit. The average and minimum creep rates as a function of the applied stress have been evaluated and are described with a creep law analogous to Norton's creep law. (ERA citation 05:030642)