Uniaxial creep test data for 13 CrMo 4 4 material at 625 °C and a stress of 75 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厂部件剩余寿命的各类技术方法。在此背景下，研究团队针对三类低铬钢牌号开展了蠕变试验（creep test），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）。本次蠕变试验的设计目标为制备一系列蠕变应变范围处于0.2%至5%的试样，用于蠕变损伤评估。此外，研究还测定了全新钢料与服役态钢料的基本断裂数据。多家蠕变试验实验室参与了本次试验项目。在FZ Jülich，本次测试的材料涵盖全新与服役态1Cr0.5Mo钢、全新0.5Cr0.5Mo0.25V钢以及全新2.25Cr1Mo钢。其中，服役态1Cr0.5Mo钢试样取自一根在525℃、110bar工况下服役250000小时的管道；0.5Cr0.5Mo0.25V钢试样则取自一个在530℃、176bar工况下服役116000小时的锻件。本蠕变数据集包含在530℃、550℃、600℃及625℃下测得的试验结果，其中最长试验时长分别为：服役态1Cr0.5Mo钢26000小时、全新态1Cr0.5Mo钢14000小时，以及全新态0.5Cr0.5Mo0.25V钢24000小时。