Design of a novel HSLA steel with a combination of high strength (140–160 ksi) and excellent toughness

2021 ◽  
Vol 112 (10) ◽  
pp. 800-811
Author(s):  
Mehdi Soltan Ali Nezhad ◽  
Sadegh Ghazvinian ◽  
Mahmoud Amirsalehi ◽  
Amir Momeni
Keyword(s):  
Impact Toughness ◽  
Yield Strength ◽  
Hsla Steel ◽  
Charpy Impact ◽  
High Strength ◽  
Controlled Rolling ◽  
The Other ◽  
Grain Structure ◽  
Charpy Impact Toughness ◽  
Fine Grain

Abstract Three steels were designed based on HSLA-100 with additional levels of Mn, Ni, Cr and Cu. The steels were prepared by controlled rolling and tempered at temperatures in range of 550–700°C. The continuous cooling time curves were shifted to longer times and lower temperatures with the increased tendency for the formation of martensite at lower cooling rates. The microstructures revealed that controlled rolling results in austenite with uniform fine grain structure. The steel with the highest amount of Mn showed the greatest strength after tempering at 750 °C. The top strength was attributed to the formation of Cu-rich particles. The steel with 1.03 wt.% Mn, tempered at 650 °C exhibited the best Charpy impact toughness at –85°C. On the other hand, the steel that contained 2.11 wt.% Mn and tempered at 700 °C showed the highest yield strength of 1 097.5 MPa (∼159 ksi) and an impact toughness of 41.6 J at –85°C.

Dual Ferrite-Martensite Treatments of an ASTM A588 HSLA Steel

1981 ◽  
Vol 39 ◽  
pp. 318-319
Author(s):  
L.J. Chen ◽  
J.R. Yang
Keyword(s):  
Yield Strength ◽  
Hsla Steel ◽  
Charpy Impact ◽  
High Strength ◽  
High Yield ◽  
The Past ◽  
Hsla Steels ◽  
Corrosion Resistance Property ◽  
Different Temperatures ◽  
Subsequent Quenching

During the past several years duplex ferrite-martensite (DFM) steels have received increasing attention for improved strength and weight applications, since they contain characteristic microstructural features that combine high strength with good formability. ASTM A588 is one of the most widely used classes of high strength low alloy (HSLA) steels. It possesses the atmospheric corrosion resistance property as well as relatively high yield strength (∼35 kg/mm2) in the normalized condition. DFM treatments has been applied to the A588 steel.The treatments consisted of initial austenitization and quenching to form 100% martensite, followed by annealing in the (α+γ) region at different temperatures and subsequent quenching. The DFM structure samples were also tempered at 200°-600°C for one hour. Phase diagram of a model steel and the schematic of treatments are shown in Figs. 1(a) and 1(b), respectively. Hardness, ultimate tensile strength, yield strength, elongation and Charpy impact values were measured for thermally treated samples.

DOMEX 315 MC

Alloy Digest ◽  
2008 ◽  
Vol 57 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Hsla Steel ◽  
High Strength ◽  
Heat Treating ◽  
Grain Structure ◽  
Bend Strength ◽  
Cold Forming ◽  
Fine Grain ◽  
Thermomechanical Rolling ◽  
Hot Rolled

Abstract Domex 315 MC is a hot-rolled, high-strength low-alloy (HSLA) steel with a fine grain structure produced through thermomechanical rolling. It is used for cold-forming operations. The alloy meets or exceeds the requirements of S315MC in EN 10149-2. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-581. Producer or source: SSAB Swedish Steel Inc.

Research and Development of a Yield Strength 400 MPa Class Structural Steel Plate with Enhanced Weldability

2014 ◽  
Vol 783-786 ◽  
pp. 1046-1052
Author(s):  
Yu Zhang ◽  
Xiao Bao Li ◽  
Xin Pan
Keyword(s):  
Impact Toughness ◽  
Yield Strength ◽  
Structural Steel ◽  
Heat Input ◽  
Steel Plate ◽  
Charpy Impact ◽  
Rolled Plate ◽  
Side Plate ◽  
Butt Weld ◽  
Charpy Impact Toughness

A 400 MPa yield strength structural steel plate with enhanced weldability was produced by using advanced steel making technology and thermo-mechanical controlled processing technique. A microstructure consisting of acicular ferrite (3~8 μm) and polygonal ferrite was observed in the rolled plate, which exhibits a yield strength ≥ 420 MPa, tensile strength ≥ 560 MPa, elongation ≥ 26 % and charpy impact toughness ≥ 300 J at-40 °C. Three-wire flux copper backing submerged arc welding with heat input of 230 kJ/cm was applied to butt weld the 36 mm thick plate, and defect-free joint with satisfactory mechanical properties were produced. The coarse grain heat affected zone (CGHAZ) contains mostly intra-granular nucleated ferrite plus a few grain boundary ferrite and ferrite side plate, and shows charpy impact toughness ≥ 90 J at-40 °C. The enhancement impact toughness of CGHAZ resultant from high heat input welding is due to improvement of intra-granular ferrite formation induced by Ca and Ti containing oxides and sulphides.

High Strength Offshore Steel with Excellent Weldability

2012 ◽  
Vol 482-484 ◽  
pp. 1650-1653
Author(s):  
Yan Tang Chen ◽  
Kai Guang Zhang
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Yield Strength ◽  
Thermal Cycle ◽  
Hsla Steel ◽  
High Strength ◽  
High Impact ◽  
Weld Thermal Cycle ◽  
Offshore Engineering ◽  
Base Steel

A new high strength low alloy (HSLA) steel in 370MPa yield strength grade with low susceptivity to weld cold cracking has been developed for offshore engineering. The microstructure feature of base steel and weld heat affected zone (HAZ) has been investigated. The systematic studies showed that the developed steel exhibited high strength(yield strength≥370MPa)、high impact toughness and excellent weldability. The complex inclusions containing fine oxides in HAZ promoted the acicular ferrite formation in weld thermal cycle and resulted in desired mechanical properties of HAZ.

Evaluation of Charpy impact toughness using side-grooved specimen for hybrid laser-arc welds of ultra-high-strength steel

2016 ◽  
Vol 60 (6) ◽  
pp. 1191-1199 ◽  
Author(s):  
Yasuhito Takashima ◽  
Mitsuru Ohata ◽  
Koutarou Inose ◽  
Hiroto Yamaoka ◽  
Yasumasa Nakanishi ◽  
...  
Keyword(s):  
Impact Toughness ◽  
High Strength Steel ◽  
Charpy Impact ◽  
High Strength ◽  
Charpy Impact Toughness ◽  
Ultra High Strength Steel

scholarly journals Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Wenquan Cao ◽  
Mingda Zhang ◽  
Chongxiang Huang ◽  
Shuyang Xiao ◽  
Han Dong ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Charpy Impact ◽  
High Strength ◽  
Charpy Impact Toughness

RUUKKI RAEX 300

Alloy Digest ◽  
2012 ◽  
Vol 61 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Shear Strength ◽  
Impact Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Structural Components ◽  
Wear Resistant

Abstract RUUKKI RAEX 300 (typical yield strength 900 MPa) is part of the Raex family of high-strength and wear-resistant steels with favorable hardness and impact toughness to extend life and decrease wear in structural components. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: SA-643. Producer or source: Rautaruukki Corporation.

scholarly journals Fuzzy Model-based Charpy Impact Toughness Assessment for Ship Steels

2004 ◽  
Vol 44 (6) ◽  
pp. 1108-1113 ◽  
Author(s):  
M.-Y. Chen ◽  
D. A. Linkens ◽  
D. J. Howarth ◽  
J. H. Beynon
Keyword(s):  
Impact Toughness ◽  
Fuzzy Model ◽  
Charpy Impact ◽  
Charpy Impact Toughness ◽  
Model Based

Local Notch Toughness of Slab Surface Zone in ULC/IF and HSLA Steels

2015 ◽  
Vol 662 ◽  
pp. 209-212
Author(s):  
Margita Longauerová ◽  
Maria Hurakova ◽  
Pavel Bekeč ◽  
Svätoboj Longauer ◽  
Mária Fedorová ◽  
...  
Keyword(s):  
Hsla Steel ◽  
Notch Toughness ◽  
Grain Structure ◽  
Surface Zone ◽  
Slab Surface ◽  
Slab Width ◽  
Fine Grain ◽  
Hsla Steels ◽  
Ferrite Structure ◽  
Ferrite Grain Size

The aim of this work was to analyze changes in local toughness KCV using Charpy V-notch impact tests in the slab surface zone in relation to the microstructure in ULC/ IF steel and TiNb HSLA steel. Marked heterogeneity in KCV values was confirmed in the surface zone across the width of transitional slabs. Distinct local differences in notch toughness across the slab width were found to be linked primarily with changes in ferrite grain size. Low KCV values in the analyzed steels were linked with coarse grain structure, while much finer ferrite structure was identified in tough samples. The heterogeneity of KCV vales in the analyzed steels may be influenced by differences in thickness of the fine-grain slab surface zone, and by the presence of tertial cementite and (in HSLA steel) of pearlite as well.

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