Comparison analysis of new and old national standards for metallic materials tensile test at elevated temperature
WU Wei
��Pangang Group Research Institute Co.�� Ltd.�� State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization�� Panzhihua 617000�� China��
Abstract��Through the comparison analysis of the new and old national standards for metallic material tensile test at elevated temperature (GB/T228.2-2015 andGB/T4338-2006), the technology alteration of the new national standard was obtained. Compared with the old national standard, the new standard modified the standard name and was listed as the second part of the GB/T 228 metallic materials tensile testing. And some vocabularies and terms were revised, the control method of the test rate, the method of the controlled strain rate, the extensometer card method, the permitted deviations and temperature gradient at some temperatures were added. The measurement method of the original cross-sectional area and the rounding rules of the experimental results were changed. Through the comparison analysis of the new and old national standards, it can help the quality inspection and testing departments, and the relating institutes to understand and apply the new standard better, and improve the the effectiveness of the testing results.
�ո�����: 2016-08-11
��������: 2017-04-18
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E-mail: wukun_00@sina.com
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�� ΰ. �������ϸ������������¾ɹ��ұ��Աȷ���[J]. �й������ڿ���, 2017, 35(2): 53-58.
WU Wei. Comparison analysis of new and old national standards for metallic materials tensile test at elevated temperature. Chinese Journal of Iron and Steel, 2017, 35(2): 53-58.
2017, Vol. 35 
