Comparison of Dynamic Tear and Charpy-V-Notch Impact Properties of Plate Steels

1978 ◽  
Vol 100 (2) ◽  
pp. 204-211 ◽  
Author(s):  
A. D. Wilson
Keyword(s):  
Quality Control ◽  
Carbon Steel ◽  
Fracture Resistance ◽  
Impact Test ◽  
Energy Transition ◽  
Steel Plates ◽  
Shelf Energy ◽  
Statistical Correlations ◽  
Fracture Appearance ◽  
Steel Grades

The increasing interest in the Dynamic Tear (DT) test for use in measuring the fracture resistance of steels in both quality control and research testing, invites a comparison to the commonly used Charpy-V-notch (CVN) impact test. The DT and CVN properties of 57 steel plates of various grades are compared in this survey. The investigation covered ASTM carbon steel grades A-36, A516, A537; ASTM alloy steel grades A533-B, AB42, A43; and other steels such as HY-130, ABS-E, and a C-Mn-Cb type. Graphical and statistical correlations were established between various DT and CVN properties including upper shelf energy, fracture appearance and mid-energy transition temperatures. These features were then compared to the nil ductility temperature (NDT). Certain of the correlations appear useful enough to allow casual prediction of DT behavior from CVN testing.

Low Impact Test Results in Carbon Steel Flanges, Fittings and Piping: End User’s View

2020 ◽  
Author(s):  
Mitul Dalal ◽  
Jorge Penso
Keyword(s):  
Carbon Steel ◽  
Impact Test ◽  
Test Results ◽  
Contributing Factors ◽  
Industry Standards ◽  
Start Up ◽  
Testing Data ◽  
Steel Grades ◽  
Toughness Testing ◽  
Test Requirements

Abstract Carbon steel components (Flanges, Fittings and Piping) have been reported with low impact test results. Some have failed during hydrotest and start-up as well as in-service. Steel grades that have shown problems complying with impact test requirements are ASTM/ASME A105, ASTM/ASME A234 Gr. WPB and ASTM/ASME A106. ASTM A350 LF2. These components according to some design-fabrication industry standards are not suitable for use even though they complied with applicable ASTM/ASME materials standards meeting the mechanical properties and chemical composition. Some analyses have led to identify key contributing factors to this low impact test results including Chemistry/Micro-alloying, fabrication approach and use of 100% re-cycle steels. This paper presents summarize findings from numerous reports of failure, testing data and selected approach when screening these materials prior to installation. Based on literature review the need for improvement in the approach for mechanical testing including fracture toughness testing for modern materials was identified.

scholarly journals Impact resistance of steel materials to ballistic ejecta and shelter development using steel deck plates

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Hiroyuki Yamada ◽  
Kohei Tateyama ◽  
Shino Naruke ◽  
Hisashi Sasaki ◽  
Shinichi Torigata ◽  
...  
Keyword(s):  
Impact Energy ◽  
Impact Test ◽  
Impact Resistance ◽  
Protective Layer ◽  
High Strength ◽  
Steel Plates ◽  
Corrugated Plates ◽  
Shelter Construction ◽  
The Impact ◽  
Ballistic Ejecta

AbstractThe destruction caused by ballistic ejecta from the phreatic eruptions of Mt. Ontake in 2014 and Mt. Kusatsu-Shirane (Mt. Moto-Shirane) in 2018 in Japan, which resulted in numerous casualties, highlighted the need for better evacuation facilities. In response, some mountain huts were reinforced with aramid fabric to convert them into shelters. However, a number of decisions must be made when working to increase the number of shelters, which depend on the location where they are to be built. In this study, we propose a method of using high-strength steel to reinforce wooden buildings for use as shelters. More specifically, assuming that ballistic ejecta has an impact energy of 9 kJ or more, as in previous studies, we developed a method that utilizes SUS304 and SS400 unprocessed steel plates based on existing impact test data. We found that SUS304 is particularly suitable for use as a reinforcing material because it has excellent impact energy absorption characteristics due to its high ductility as well as excellent corrosion resistance. With the aim of increasing the structural strength of steel shelters, we also conducted an impact test on a shelter fabricated from SS400 deck plates (i.e., steel with improved flexural strength provided by work-hardened trapezoidal corrugated plates). The results show that the shelter could withstand impact with an energy of 13.5 kJ (2.66 kg of simulated ballistic ejecta at 101 m/s on impact). In addition, from the result of the impact test using the roof-simulating structure, it was confirmed the impact absorption energy is further increased when artificial pumice as an additional protective layer is installed on this structure. Observations of the shelter after the impact test show that there is still some allowance for deformation caused by projectile impact, which means that the proposed steel shelter holds promise, not only structurally, but also from the aspects of transportation and assembly. Hence, the usefulness of shelters that use steel was shown experimentally. However, shelter construction should be suitable for the target environment.

Evaluation Method for Time-Dependent Corrosion Behavior of Carbon Steel Plate Using Atmospheric Corrosion Monitoring Sensor

2009 ◽  
Vol 417-418 ◽  
pp. 417-420 ◽  
Author(s):  
Shigenobu Kainuma ◽  
Kunihiro Sugitani ◽  
Yoshihiro Ito ◽  
In Tae Kim
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Evaluation Method ◽  
Steel Plates ◽  
Time Dependent ◽  
Corrosion Monitoring ◽  
Corrosion Sensor ◽  
Atmospheric Exposure ◽  
Corrosive Environments

The purpose of this research is to propose a method for evaluating the time-dependent corrosion behavior of carbon steel plates using an atmospheric corrosion monitor (ACM) corrosion sensor consisting of a Fe/Ag-galvanic couple. Atmospheric exposure tests were carried out on steel　plates for periods of 6, 12, and 24-months on the island of Okinawa in Japan. The Specimens were mounted on racks at angles of 0, 45 and 90 to the horizontal to obtain corrosion data in various corrosive environments. In addition, the environments of the skyward- and groundward-facing surfaces of the specimens were monitored using ACM sensors. The sensor outputs were recorded during the exposure tests.

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