Uniaxial creep test data for 13 CrMo 4 4 material at 550 °C and a stress of 98.38 MPa

The aim of the project was to compare various techniques for the assessment of remaining life for power plant components. In this context, creep tests were performed on three grades of low Cr steel, namely 1Cr0.5Mo (DIN 13CrMo 4 4), 0.5Cr0.5Mo0.25V (DIN 14MoV 6 3), and 2.25Cr1Mo (DIN 10CrMo 9 10). The creep tests were designed to provide a series of test pieces with defined creep strains ranging from 0.2 to 5 % for creep damage assessment. In addition, basic rupture data were determined for the steels in the new and service exposed conditions. Several creep laboratories participated in the test programme. At FZ Jülich the materials tested were new and service exposed 1Cr0.5Mo, new 0.5Cr0.5Mo0.25V and new 2.25Cr1Mo steels. The 1Cr0.5Mo service exposed specimens were taken from a pipe that had been in service at 525 oC for 250 000 h at 110 bar, and the 0.5Cr0.5Mo0.25V from a forging after 116 000 h service exposure at 530 °C, 176 bar. The creep data set contains test results determined at 530, 550, 600 and 625 °C and the longest test times were 26000 h for 1Cr0.5Mo service exposed, 14000 h for 1Cr0.5Mo new and 24000 h for new 0.5Cr0.5Mo0.25V.

本项目旨在比较电厂部件剩余寿命评估的各类技术。在此背景下，针对三种低铬钢（即1Cr0.5Mo（DIN 13CrMo 4 4）、0.5Cr0.5Mo0.25V（DIN 14MoV 6 3）和2.25Cr1Mo（DIN 10CrMo 9 10））开展了蠕变试验。该蠕变试验旨在制备一系列具有0.2%至5%确定蠕变应变的试样，用于蠕变损伤评估。此外，还测定了新制钢与服役后钢的基础断裂数据。多家蠕变实验室参与了本测试计划。在FZ Jülich实验室，测试材料包括新制及服役后的1Cr0.5Mo钢、新制0.5Cr0.5Mo0.25V钢和新制2.25Cr1Mo钢。其中，1Cr0.5Mo服役试样取自525℃、110 bar工况下服役250000小时的管道；0.5Cr0.5Mo0.25V服役试样则取自530℃、176 bar工况下服役116000小时的锻件。蠕变数据集涵盖530℃、550℃、600℃及625℃下的测试结果，最长测试时长分别为：服役后1Cr0.5Mo钢26000小时、新制1Cr0.5Mo钢14000小时、新制0.5Cr0.5Mo0.25V钢24000小时。