Uniaxial creep test data for 13 CrMo 4 4 se material at 550 °C and a stress of 100 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.

本项目旨在对比评估电站部件剩余寿命的各类技术手段。为此，研究人员针对三种低铬钢开展了蠕变试验，分别为1Cr0.5Mo（DIN 13CrMo 4 4）、0.5Cr0.5Mo0.25V（DIN 14MoV 6 3）以及2.25Cr1Mo（DIN 10CrMo 9 10）。本次蠕变试验制备了一系列预设蠕变应变范围为0.2%至5%的试样，用于蠕变损伤评估。此外，还测定了新态及服役后态钢材的基本断裂数据。多家蠕变实验室参与了本试验项目。在于利希研究中心（FZ Jülich）中，受试材料包括新态与服役后态1Cr0.5Mo钢、新态0.5Cr0.5Mo0.25V钢以及新态2.25Cr1Mo钢。其中，1Cr0.5Mo服役后态试样取自一台在525℃、110bar工况下服役250000小时的管道，0.5Cr0.5Mo0.25V服役后态试样则取自一台在530℃、176bar工况下服役116000小时的锻件。本蠕变数据集包含了在530℃、550℃、600℃及625℃下测得的试验结果，最长试验时长分别为：1Cr0.5Mo服役后态试样26000小时、1Cr0.5Mo新态试样14000小时，以及0.5Cr0.5Mo0.25V新态试样24000小时。