New World’s Record for Longest Creep Test Data is Expected!

Collection of Creep Deformation Data for 14,853 Days

2011.02.24

National Institute for Materials Science

The NIMS is engaged in a long-term creep data sheet project as part of efforts to improve the knowledge infrastructure under its Mid-Term Program. On February 27, 2011, the creep test1) which began on June 19, 1969 is expected to reach a total of 14,853 test days from its start, setting a new world’s record for the longest creep test data.

Abstract

  1. The National Institute for Materials Science (President: Sukekatsu Ushioda) is engaged in a long-term creep data sheet project as part of efforts to improve the knowledge infrastructure under its Mid-Term Program. On February 27, 2011, the creep test1) which began on June 19, 1969 is expected to reach a total of 14,853 test days from its start, setting a new world’s record for the longest creep test data.
  2. Until now, a creep test by the German company Siemens, which was discontinued in 2000, was the longest creep test data reported anywhere in the world. The test time was 356,463 hours, which is equivalent to 14,852 days and 15 hours. Thus, the creep data covering 14,853 day collected by NIMS will set a new world’s record for the longest long-term creep deformation data. Although 3 other long-term creep deformation data exceeding 300,000 hours have been reported in Germany, NIMS has already obtained 4 sets of creep fracture data exceeding 300,000 hours, and is currently continuing 8 other creep tests now exceeding 300,000 hours.
  3. The test piece used in this test is 0.3% carbon steel, which was sampled from a carbon steel plate for boiler and pressure vessels (JIS G3103, SB840). The creep test conditions are temperature: 400°C and stress: 294MPa.