Feb 18, 2020 · Many attempts have been made to analyse the microstructure of API X70 steel welded joints. However, there is a lack of a more systematic metallographic investigations comprising the base material, HAZ as well as weld metal with relation to mechanical properties [10,11,12,13,14,15,16,17,18,19,20].Ghomashchi and co-workers  revealed that the microstructure of
API 5L X70 - BEBON steelX70 steel plate/pipes is one mainly of Steel for large diameter pipes,API-X70 steel with the demands in mechanical properties of the pipes followed the API specification for grade X70 (YS is 485MPa, TS is from 600-750 MPa).It is well known that a low carbon bainitic microstructure offers an excellent combination of strength and toughness.
microstructure alterations and mechanical properties in the heat affected zone of a microalloyed steel by varying the feed rate of the cold wire. in a bid to enhance the microstructure as well as the mechanical properties of the heat affected zone of an X70 microalloyed steel (pipeline steel with a yield strength of 70 ksi or 480 MPa) weld
Correlation of microstructure and fracture properties of EXPERIMENTAL finished at two temperatures, 830 °C to 860 °C and 720 °C to 750 °C, which were the temperature in the austenite Three kinds of X70 grade pipeline steels having yield single-phase region over Ar3 and the temperature in the strengths above 483 MPa (70 ksi) were used in this study, (austenite ferrite) two-phase region below Ar3, respectively. and their chemical compositions are shown in Table I.
Correlation of microstructure and fracture properties of Effects of microstructure on fracture toughness and transition temperature of high-toughness X70 pipeline steels were investigated in this study. Three types of steels were fabricated by varying alloying elements such as C, Cu, and Mo, and their microstructures were varied by rolling conditions such as finish rolling temperature and finish cooling temperature.
In order to improve the mechanical properties of API X70 pipeline steel, a rolling schedule in the recrystallization temperature region associated with a post heat treatment was proposed. Optical and scanning electron microscopy, electron backscattered diffraction, hardness, and tensile tests were carried out to show the effects of microstructure and crystallographic orientation on the final
Effect of Rolling in the Recrystallization Temperature In order to improve the mechanical properties of API X70 pipeline steel, a rolling schedule in the recrystallization temperature region associated with a post heat treatment was proposed. Optical and scanning electron microscopy, electron backscattered diffraction, hardness, and tensile tests were carried out to show the effects of microstructure and crystallographic orientation on the final mechanical
Mechanical Properties of High-Nb X80 Steel Weld Pipes for The mechanical properties of steel pipe have great effects on the integrality and operation safety of gas transmission pipeline. In order to reduce the cost of the steel pipe, the high-Nb X80 pipeline steels with the different alloying systems have been used in the Second West-to-East Gas Transmission Pipeline Project. Nevertheless, an investigation into the effects of chemical composition on
5 Y. Liu, Y. Feng, Q. Ma, X. Song:Dynamic fracture toughness of X70 pipeline steel and its relationship with arrest toughness and CVN, Materials and Design 23 (2002), pp. 693699 10.1016/S0261-3069(02)00077-8 Crossref Google Scholar
Mechanical properties, microstructure and toughness Mechanical properties, microstructure and toughness assessment of a X70 pipeline steel Muneer Baig 1 , Ehab El-Danaf 1 * , Mahmoud Soliman 1 , Abdulhakim Almajid 1 ,
Microstructure and Mechanical Properties of Two Api commercial microalloyed API pipeline steels manufactured by Brazilian steel plants. The API 5L X60 and X70 grade steels were analyzed and compared in terms of microstructure and mechanical properties. The objective of this study was to verify the safely replacement of an old steel (X60) by a modern steel (X70) in a recently designed
Anti-H2S X70 pipeline steel was developed. The microstructure of X70 pipeline steel was studied by the analysis of OM, SEM and TEM. The precipitation behavior was discussed. The comprehensive mechanical properties, HIC and SCC performance were systematically studied. The results indicated that the microstructure of the experimental steel was mainly acicular ferrite and granular bainite.
Pipeline steel > Hot strip > Products > thyssenkrupp Steel Pipeline steel Hot strip Products thyssenkrupp Steel Europe. Skip Navigation. powercore ® grades with special physical properties Insulation types Strip shape Width deviations Geometric properties Comparison chart Packing L485 or X70 :3.00 23.00 :1,000 1,800 :L555 or X80 :L555 or X80 :Pipeline steel PSL 2
Study on corrosion and delamination behavior of X70 X70 steel pipeline was chosen for the experiment. Its chemical composition (wt%) was C (0.061), Si (0.24), Mn (1.53), P (0.011), S (0.0009), and Fe. The yield stress of X70 steel was 520 MPa. The samples were cut along the axis of the pipe using a wire cutting machine, the sample size of
The fracture toughness of two acicular ferrite, high strength low alloy (HSLA) pipeline steels was investigated utilizing a linear elastic fracture mechanics analysis (KIC testing according to ASTM E399-74) as well as an elastic plastic fracture mechanics analysis (J-Integral and crack opening displacement COD methods). The tests were conducted at a strain rate of 10-4/s, K= 10 Ksiin/s (11
Tube & pipeline steel - thyssenkruppHere you can find the thyssenkrupp product range for tube and pipeline steel according to API 5L/DIN EN ISO 3183, DIN EN 10 208-2. Skip Navigation. powercore ® grades with special physical properties Insulation types Strip shape Width deviations Geometric properties L485 or X70 :L485 or X70 - - 1 Not all thickness and width API 5L X 70 steel plate/ pipes for large diameter pipesX70 steel plate/ pipes is one mainly of Steel for large diameter pipes ,API-X 70 steel with the demands in mechanical properties of the pipes followed the API specification for grade X70 (YS is 485MPa, TS is from 600-750 MPa ).It is well known that a low carbon bainitic microstructure offers an excellent combination of strength and toughness .