Weldability of Controlled Rolled Micro Alloyed Thick HSLA Steel Plates for Fabrication of Penstock Liners

2005 ◽  
Vol 38 (1) ◽  
pp. 56
Author(s):  
P. K. Ghosh ◽  
A. K. Saxena ◽  
K. Devakumaran
Keyword(s):  
Hsla Steel ◽  
Steel Plates

Comparison between Modelled Influence of GMAW Parameters and Corresponding Mechanical Properties of Group 1 and 2 According to ISO/TR 15608 Steel T Joints

2021 ◽  
Vol 890 ◽  
pp. 17-24
Author(s):  
Aurel Valentin Bîrdeanu ◽  
Alin Constantin Murariu ◽  
Horia Florin Daşcău ◽  
Iuliana Duma
Keyword(s):  
Process Parameters ◽  
High Performance ◽  
Hsla Steel ◽  
Welding Process ◽  
High Strength ◽  
Industrial Applications ◽  
Steel Plates ◽  
Experimental Program ◽  
Welding Parameters ◽  
T Joints

Reproducibility in respect to welded structures realization is one of the main requirements for a wide variety of industrial applications. One of the international tendencies regarding the use of the steel is the replacing, in critical areas, of structural steels with high performance steel, e.g. with HSLA steels. The paper presents the results of a factorial designed experimental program focused on determining mathematical correlations between the GMAW process parameters for T joints of 4mm thick steel plates of structural (S235JR+AR according to SR EN 10025-2) and hot-rolled, high-strength low-alloy (HSLA) steel plates (S420MC according to EN 10025-4), respectively. A comparison between the obtained mathematical correlations that connect the welding parameters and the main mechanical characteristics is presented. The correlations can be used for applying the optimal combination of welding process parameters for realizing the T-joints of welded products.

On the Microstructure of Plate Steels for API-5L X120 Applications

2012 ◽  
Vol 706-709 ◽  
pp. 17-23 ◽  
Author(s):  
C. Isaac Garcia ◽  
Ming Jian Hua ◽  
X. Liang ◽  
P. Suikannen ◽  
Anthony J. DeArdo
Keyword(s):  
Hsla Steel ◽  
High Strength ◽  
Steel Plates ◽  
Low Carbon ◽  
Austenite Grain Size ◽  
Direct Quenching ◽  
Prior Austenite Grain Size ◽  
Optical Examination ◽  
Very High

The very high strength now achievable in low carbon HSLA steel plates is caused by the formation of bainite or martensite during the post-hot rolling cooling in interrupted direct quenching. Modern electron optical examination, especially FEG-SEM, has allowed the microstructural features such as packet, block and lath dimensions and crystallography to be quantitatively determined. Several recent studies have attempted to relate the strength and toughness to these features, with limited success. However, one observation is clear, these microstructural features scale with the prior-austenite grain size and state of recrystallization. The role of microalloying, beyond grain refinement, remains inconclusive. This paper will discuss these microstructures and suggest possible ways of further refining them.

Precipitates in two Zr-bearing HSLA steel plates

2010 ◽  
Vol 64 (2) ◽  
pp. 219-222 ◽  
Author(s):  
H.R. Wang ◽  
W. Wang ◽  
J.Q. Gao
Keyword(s):  
Hsla Steel ◽  
Steel Plates

As-Rolled High-Strength Plate Grades for Navy Shipbuilding Applications

1989 ◽  
Vol 5 (03) ◽  
pp. 200-205
Author(s):  
J. G. Speer ◽  
S. S. Hansen
Keyword(s):  
Microalloyed Steel ◽  
Hsla Steel ◽  
High Strength ◽  
Steel Plates ◽  
Low Carbon ◽  
Heat Treated

As-rolled high-strength, low-alloy (HSLA) steel plates offer a number of benefits compared with heat-treated plates, and this paper discusses laboratory and production experiments which have been conducted to develop as-rolled grades for high-strength Navy shipbuilding applications (for example, HSLA-65 and HSLA-80). A low-carbon niobium/vanadium microalloyed steel is shown to offer favorable combinations of strength, toughness, and weldability. The results indicate that an as-rolled grade which meets the current HSLA-80 strength and impact requirements can be produced in thicknesses up to approximately 19 mm (3/1 in.); HSLA-65 plates can be produced up to about 51 mm (2 in.) thick. This grade is generally weldable without preheat using HY-80 consumables.

scholarly journals Metallurgical Investigation of HSLA Steel Subjected to Underwater Explosion

1994 ◽  
Vol 1 (4) ◽  
pp. 385-394
Author(s):  
V. Bhujanga Rao ◽  
R. Rajendran ◽  
A.V. Jaykumar ◽  
K.H.B.S. Satyanarayana
Keyword(s):  
Hsla Steel ◽  
Underwater Explosion ◽  
Underwater Vehicles ◽  
Steel Plates ◽  
Ductile Deformation ◽  
Metallurgical Investigation ◽  
Adiabatic Shearing ◽  
Structural Applications ◽  
Mode Of Failure ◽  
Fractographic Examination

The metallurgical behaviour of HSLA steel subjected to underwater explosion is of prime importance because of its structural applications in underwater vehicles. HSLA steel plates 300 × 250 × 4 mm were subjected to single and repetitive shock loadings and the point of rupture was identified. Test plates exhibited mode-I (large ductile deformation) and mode-II (tensile tearing) macroscopic failures. Electron micrographic and fractographic examination showed that the initiation of fracture was due to adiabatic shearing and the microscopic mode of failure was ductile. Plates subjected to single shock showed an increase in residual hardness and at the point of rupture it was approximately one-third higher than the initial residual hardness.

scholarly journals Underwater Shock Response of Circular HSLA Steel Plates

2000 ◽  
Vol 7 (4) ◽  
pp. 251-262 ◽  
Author(s):  
R. Rajendran ◽  
K. Narasimhan
Keyword(s):  
Hsla Steel ◽  
Underwater Explosion ◽  
High Strength ◽  
Steel Plates ◽  
Analytical Models ◽  
Second Phase ◽  
Electron Microscopic ◽  
Shock Response ◽  
Slant Fracture ◽  
Two Phases

Studies on shock response of circular plates subjected to underwater explosion is of interest to ship designers. Non-contact underwater explosion experiments were carried out on air backed circular High Strength Low Alloy (HSLA) steel plates of 4 mm thickness and 290 mm diameter. The experiments were carried out in two phases. In the first phase, strain gauges were fixed at intervals of 30 mm from the centre of the plate and strains were recorded for the shock intensity gradually increasing to yielding. Semi-analytical models were derived for the elastic strain prediction which showed good agreement with the experiments. Dynamic yield stress and the shock factor for yielding were established. In the second phase, individual plates were subjected to increasing shock severity until fracture and the apex bulge depth and the thickness strains were measured. Empirical models were derived to predict the plastic deformation which were validated through a fresh set of experiments. Analysis of the fractured surface by visual examination showed that there was slant fracture indicating ductile mode of failure and the same was corroborated by Scanning Electron Microscopic (SEM) examination.

scholarly journals Tensile Deformation and Fracture Behavior of API-5L X70 Line Pipe Steel

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 501
Author(s):  
Mikhail L. Lobanov ◽  
Vladislav A. Khotinov ◽  
Vladimir N. Urtsev ◽  
Sergey V. Danilov ◽  
Nikolay V. Urtsev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Deformation ◽  
Electron Backscatter Diffraction ◽  
Hsla Steel ◽  
Rolling Direction ◽  
Rolling Plane ◽  
Steel Plates ◽  
Line Pipe ◽  
Pipeline Steels ◽  
Oil Pipeline

Thermo-mechanical controlled processing (TMCP) is employed to obtain the required level of mechanical properties of contemporary HSLA steel plates utilized for gas and oil pipeline production. The strength and crack resistance of pipeline steels are mainly determined by its microstructure and crystallographic texture. In this study, the influence of the structural and textural states of industrially produced API-5L X70-X80 pipeline steels on tensile mechanical properties was analyzed. TMCP routes with different hot rolling temperatures and cooling rates were employed. The texture of steel was assessed using the Taylor factor, which was calculated based on electron backscatter diffraction (EBSD). The decrease in rolling temperature resulted in the sharper texture characterized by {001} planes banding (cleavage planes in the bcc lattice) parallel to rolling direction. The tensile deformation behavior at the stage of necking was determined by the crystallographic and morphological texture of the material and demonstrated significant anisotropy. Rupture of all investigated samples was accompanied by the development of splitting on the fracture surface. The splitting was localized in the rolling plane similar to the splitting in standard Charpy tests of pipeline steels.

Correlation between GMAW Parameters and Mechanical Properties of Hot-Rolled, High-Strength Low-Alloy (HSLA) Steel Butt Joints

2021 ◽  
Vol 890 ◽  
pp. 25-32
Author(s):  
Alin Constantin Murariu ◽  
Aurel Valentin Bîrdeanu
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
Hsla Steel ◽  
Gas Metal Arc Welding ◽  
High Strength ◽  
Steel Plates ◽  
Experimental Program ◽  
Welding Parameters ◽  
Main Process ◽  
Hot Rolled

In all industrial fields, the product requirements are more and more demanding. HSLA steels are designed to provide higher atmospheric corrosion resistance and improved mechanical properties than structural steels. The paper presents the results of an experimental program based on factorial design, applied to predict the mechanical properties of butt-welded joints of S420MC and S460MC hot-rolled, high-strength low-alloy (HSLA) steel plates with 2mm, 4mm and 8mm thickness. Gas Metal Arc Welding (GMAW) was used and correlations between the main process parameters and the related mechanical properties of the welded joints were found. Obtained mathematical correlations can be exploited to provide optimal combination of welding parameters to fit the quality requirements of the end-users for envisaged welded product.

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