Uniaxial creep test data for 13 CrMo 4 4 material at 550 °C and a stress of 98.66 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，针对三种低铬钢牌号开展了蠕变试验（creep test），即1Cr0.5Mo（DIN 13CrMo 4 4）、0.5Cr0.5Mo0.25V（DIN 14MoV 6 3）及2.25Cr1Mo（DIN 10CrMo 9 10）。这些蠕变试验旨在制备一系列具有规定蠕变应变（范围为0.2%至5%）的试样，用于蠕变损伤评估。此外，还测定了这些钢材在新态及服役暴露状态下的基础断裂数据。多个蠕变实验室参与了本试验项目。在FZ Jülich实验室，测试材料包括新态及服役暴露态的1Cr0.5Mo钢、新态的0.5Cr0.5Mo0.25V钢与新态的2.25Cr1Mo钢。该蠕变数据集包含在530℃、550℃、600℃及625℃下测定的试验结果；其中，服役暴露态1Cr0.5Mo钢的最长试验时间为26000小时，新态1Cr0.5Mo钢为14000小时，新态0.5Cr0.5Mo0.25V钢为24000小时。