scholarly journals STUB COLUMN TEST OF HIGH-STRENGTH CRS STEEL COLUMN WITH SMALL DIAMETER-TO-THICKNESS RATIO

1998 ◽  
Vol 63 (507) ◽  
pp. 123-129 ◽  
Author(s):  
Teruyasu KAMBA
Keyword(s):  
Small Diameter ◽  
High Strength ◽  
Thickness Ratio ◽  
Column Test ◽  
Steel Column ◽  
Stub Column

CARPENTER CUSTOM 475

Alloy Digest ◽  
2006 ◽  
Vol 55 (9) ◽  
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Small Diameter ◽  
High Strength ◽  
Heat Treating ◽  
Good Corrosion Resistance ◽  
Technology Corporation ◽  
Peak Aged ◽  
Carpenter Technology Corporation

Abstract Custom 475 stainless is a premium melted, high-strength, martensitic, precipitation-hardenable stainless steel. It provides good corrosion resistance and was designed to achieve a tensile strength up to 2000 MPa (290 ksi), combined with good toughness and ductility when in the H975 condition, peak aged at 525 deg C (975 deg F). Other combinations of strength are possible by applying aging temperatures up to 595 deg C (1100 deg F). The alloy is available in strip, wire, and small diameter bar. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-974. Producer or source: Carpenter Technology Corporation.

scholarly journals STRUCTURAL BEHAVIORS OF CONCRETE FILLED SQUARE TUBULAR HIGH STRENGTH STEEL COLUMN TO H-BEAM CONNECTIONS

1993 ◽  
Vol 446 (0) ◽  
pp. 127-136 ◽  
Author(s):  
Koji MORITA ◽  
Masaru TERAOKA ◽  
Takahiko SUZUKI ◽  
Toshio FUJIWARA ◽  
Hisaaki YABUSAME
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Steel Column ◽  
H Beam ◽  
Structural Behaviors

Design of a Large Diameter Steel Reinforced Plastic Pipe

2011 ◽  
Author(s):  
Jun Shi ◽  
Jing Rao ◽  
Jianfeng Shi ◽  
Ping Xu ◽  
Taiqing Shao ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Steel Wire ◽  
Large Diameter ◽  
Small Diameter ◽  
High Strength ◽  
External Pressure ◽  
Wire Mesh ◽  
Plastic Pipe ◽  
Reinforced Plastic ◽  
Steel Wire Mesh

A steel reinforced plastic pipe (PSP), which is composed of two layers of high density polyethylene (HDPE) matrix and a high strength steel wire mesh skeleton, has wide applications in many industrial areas, such as gas and petroleum transportation, etc. In order to achieve higher efficency and lower costs, a large diameter PSP has been developed. However, requirements of the large diameter PSP in safety and economy are much higher, compared with those small diameter PSPs, and some potential problems should be taken into account. In this paper, relevant structural parameters of the large diameter PSP are determined, based on a previously proposed model, and a short-term burst test is carried out. The experiment results agree with the theoretical results quite well. Subsequently, the resistance of vertical pressure and uniform external pressure are evaluated by using experiment investigation and finite element method, respectively. And corresponding results indicate the large diameter PSP with determined structural parameters is qualified to use.

Compressive Testing of H-Shaped Steel Stub Columns Fabricated with Grade 800MPa High Performance Steel

2013 ◽  
Vol 671-674 ◽  
pp. 646-649
Author(s):  
Kang Min Lee ◽  
Myung Jae Lee ◽  
Young Suk Oh ◽  
T.S. Kim ◽  
Do Hwan Kim
Keyword(s):  
High Performance ◽  
High Strength ◽  
Structural Members ◽  
Basic Study ◽  
High Rise ◽  
Long Span ◽  
Compressive Testing ◽  
High Performance Steel ◽  
Stub Column ◽  
Structural Behaviors

With the increased demand for high-rise and long-span structures, high strength with high performance steels have been utilized for these kind of structures. For the grade 800MPa high performance steel, although it was included in Korean Standard as high strength steel(HSA 800), however the HSA 800 steel was excluded in Korean Building Code-Structures due to the rack of research results for the structural behaviors of members fabricated with HSA 800 steel. Therefore, this paper describes basic study for the design specification of structural members using HSA 800 high performance steel. For this purpose, welded H-shaped stub column specimens with various width-to-thickness ratios were designed and tested in order to investigate the buckling behaviors and ultimate compressive strength.

Expanded, and Welded-and-Expanded Tube-to-Tubesheet Joints

1992 ◽  
Vol 114 (2) ◽  
pp. 157-165 ◽  
Author(s):  
S. Yokell
Keyword(s):  
Pressure Vessel ◽  
Joint Strength ◽  
Small Diameter ◽  
High Strength ◽  
Interfacial Stress ◽  
Uniform Pressure ◽  
Plastic Tube ◽  
Before And After ◽  
Section Viii ◽  
Rolling Torque

This paper discusses some practical aspects of expanded and welded-and-expanded tube-to-tubesheet joints. It reviews elastic-plastic tube expanding theory, which it uses as the basis for setting pressures for uniform-pressure expanding and for estimating residual interfacial stress at the tube-hole interface. It addresses uniform-pressure-expanded tube joint strength and the problem of correlating of roller-expanded joint strength with wall reduction and rolling torque. It advocates two-stage expanding: 1) applying just sufficient pressure or torque to create firm tube-hole contact over substantially the tubesheet thickness; and 2) re-expanding at full pressure or torque. It points out the advantages of segregating heats of tubing and mapping the tube-heat locations. It recommends non-TEMA Standard (and non-HEI Power Plant Standard) grooves for grooved-hole joints made by roller-expanding, when the tubes are thin-walled, high-strength, low-elastic-modulus, and for joints made by uniform-pressure expanding [1, 2]. It states what to examine when considering grooves for small-diameter tubes. It reviews tube-to-tubesheet welding requirements and discusses welding before and after expanding. It suggests TEMA revise its standards to define strength and seal welds and urges the ASME Boiler and Pressure Vessel Code Committee (the Code Committee) to incorporate the TEMA definition in Section VIII of the ASME Boiler and Pressure Vessel Code (the Code) [3]. It makes recommendations for pressure and leak-testing. The work shows why welded-and-expanded joints should be full-strength expanded and why expansion length should equal the tubesheet thickness minus 1/8 in. (approximately 3 mm) rather than the lengths the TEMA and HEI Standards permit.

High-Strength Nb3Sn Wire Development for Compact Superconducting Magnets

2007 ◽  
Vol 546-549 ◽  
pp. 1841-1848 ◽  
Author(s):  
K. Watanabe ◽  
Satoshi Awaji ◽  
Gen Nishijima
Keyword(s):  
High Field ◽  
Magnetic Energy ◽  
Superconducting Magnets ◽  
Small Diameter ◽  
High Strength ◽  
Superconducting Magnet ◽  
Hybrid Magnet ◽  
Superconducting Wires ◽  
External Reinforcement ◽  
Nb3sn Strand

A superconducting magnet with a magnetic energy of E = B2/2μo [J/m3] has to overcome a magnetic force of P = B2/2μo [Pa] in the same expression. This means that a high-field 20 T superconducting magnet produces an electromagnetic force of 160 MPa. In order to stand such a large force, Nb3Sn superconducting wires are usually reinforced by the hard-copper housing as an external reinforcement method or the stainless steel winding as a mechanical backup of an outermost Nb3Sn coil. If we focus on a compact superconducting magnet like a cryocooled superconducting magnet, a high-strength superconducting wire with a small diameter size of 1- 2 mm is required. The High-Field Laboratory for Superconducting Materials, IMR, Tohoku University has developed Nb3Sn wires internally reinforced with CuNb or CuNbTi composite. These high-strength Nb3Sn wires were successfully employed to construct the unique compact cryocooled 28 T hybrid magnet and the cryocooled 18 T high-temperature superconducting magnet. In addition, we found that the prebending effect for high-strength Nb3Sn wires outstandingly improves the Tc, Bc2 and Ic properties. As a next step, we intend to develop new Nb3Sn strand cables with the strong mechanical property of 500 MPa, applying the prebending effect for a future 22 T-φ400 mm room temperature bore superconducting magnet of a 50 T-class hybrid magnet.

Failure of X52 Wrinkled Pipelines Subjected to Monotonic Axial Deformation

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Y. Zhang ◽  
S. Das
Keyword(s):  
Parametric Study ◽  
Numerical Study ◽  
Numerical Technique ◽  
Small Diameter ◽  
Full Scale ◽  
Thickness Ratio ◽  
Axial Deformation ◽  
Cross Sectional ◽  
Full Scale Tests ◽  
Internal Pressures

This study was undertaken to investigate and understand the behavior of a wrinkled energy pipeline when subjected to sustained monotonic axial compressive deformation. This study involved both experimental and numerical investigations. Two full-scale laboratory tests with moderate and high internal pressures on X52 grade steel pipes with a diameter-to-thickness ratio of 45 show that this pipeline is extremely ductile and did not rupture under axisymmetric compressive axial deformation. However, they fail due to the excessive cross-sectional deformation and the final deformed shape looks like an accordion due to the formation of multiple wrinkles. Subsequently, a detailed parametric study using a numerical technique was undertaken to determine the failure condition and failure mode of this pipeline for various realistic internal pressures and diameter-to-thickness ratios. A nonlinear finite element method was used for the numerical study. The numerical model was validated with the data obtained from the two full-scale tests. The parametric study shows that the X52 linepipe loses its integrity due to the rupture in the pipe wall if the internal pressure is low and/or if the pipe has a small diameter-to-thickness ratio. This paper presents and discusses the results obtained both from the experimental and numerical parametric studies.

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