Optimization of Metallurgical Factors for Production of High Strength, High Toughness Steel Plate by Controlled Rolling

Offshore structure steel with high strength of YS550MPa has been investigated. As for offshore structure steel, high toughness in welded joints is required in addition to that in base metal. TMCP type steel of up to YS420MPa grade is used widely, and up to YS500MPa grade is reported in some papers. However, steel of higher strength grade with good toughness and weldability will be beneficial to structures in strict conditions. To reach the YS550MPa requirement, hardening effect by Cu precipitation was utilized. Steel plates were designed with micro-alloyed low C-Mn-Cu-Ni-Cr-Mo system. The combination of the copper precipitation and TMCP technology can increase strength without deteriorating toughness and weldability. Heat treatment for Cu precipitation was carried out to optimize the balance of strength and toughness of the base metal. The developed steel also shows good HAZ CTOD toughness up to 76.2mm thickness in several welding conditions including after PWHT. The newly developed steel has the possibility to increase the flexibility to design large-sized structures.

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Microstructure and Performance Control of High strength and High Toughness Ti-Nb Microalloyed Marine Steel Plate

Journal of Physics Conference Series ◽

10.1088/1742-6596/1676/1/012040 ◽

2020 ◽

Vol 1676 ◽

pp. 012040

Author(s):

Jixiang Gao ◽

Daobiao Liao ◽

Liejun Li ◽

Feng Zhou

Keyword(s):

Steel Plate ◽

High Strength ◽

Performance Control ◽

High Toughness ◽

And Performance ◽

Microstructure And Performance

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ASTM A710

Alloy Digest ◽

10.31399/asm.ad.sa0446 ◽

1990 ◽

Vol 39 (4) ◽

Keyword(s):

Fracture Toughness ◽

Tensile Properties ◽

Precipitation Hardening ◽

Steel Plate ◽

High Strength ◽

Heat Treating ◽

Low Carbon ◽

Bethlehem Steel Corporation ◽

Strength Alloy ◽

Carbon Precipitation

Abstract ASTM A710 is a low-carbon, precipitation hardening high-strength alloy steel plate. It is well suited to critical applications. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on heat treating and joining. Filing Code: SA-446. Producer or source: Bethlehem Steel Corporation.

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DILLIMAX 500

Alloy Digest ◽

10.31399/asm.ad.sa0645 ◽

2012 ◽

Vol 61 (3) ◽

Keyword(s):

Fracture Toughness ◽

Yield Strength ◽

Physical Properties ◽

Structural Steel ◽

Tensile Properties ◽

High Strength ◽

Heat Treating ◽

Fine Grained ◽

High Toughness ◽

Minimum Yield

Abstract Dillimax 500 is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of 500 MPa (72 ksi). Plate is delivered in three qualities: basic, high toughness, and extra tough. This datasheet provides information on composition, physical properties, and tensile properties as well as fracture toughness. It also includes information on surface qualities as well as forming, heat treating, and joining. Filing Code: SA-645. Producer or source: Dillinger Hütte GTS.

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BETHSTAR 60

Alloy Digest ◽

10.31399/asm.ad.sa0421 ◽

1986 ◽

Vol 35 (8) ◽

Keyword(s):

Fracture Toughness ◽

Yield Strength ◽

Steel Plate ◽

High Stress ◽

High Strength ◽

Heat Treating ◽

Low Carbon ◽

Bethlehem Steel Corporation ◽

Low Sulfur ◽

Minimum Yield

Abstract BethStar 60 steel plate is a high-strength product with a 60,000 psi minimum yield strength. It contains low carbon and low sulfur and has outstanding toughness, weldability and formability. It provides the design engineer with a an economical high-strength low-alloy (HSLA) grade that can be fabricated readily. Applications include weight-sensitive components subject to high stress such as frames for large off-highway haulers. This datasheet provides information on composition, physical properties, microstructure, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-421. Producer or source: Bethlehem Steel Corporation.

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SPARTAN II

Alloy Digest ◽

10.31399/asm.ad.sa0738 ◽

2016 ◽

Vol 65 (1) ◽

Keyword(s):

Yield Strength ◽

Physical Properties ◽

Tensile Properties ◽

High Strength ◽

Low Carbon ◽

Copper Precipitation ◽

High Toughness ◽

The Family ◽

Alloy Steels ◽

Minimum Yield

Abstract SPARTAN II (HSLA-100) is one of the family of Spartan high strength (>690 MPa, or >100 ksi, minimum yield strength), high toughness, improved weldability steels, which are alternatives to traditional quenched and tempered alloy steels. The Spartan family of steels are low carbon, copper precipitation hardened steels. Spartan II has improved yield strength compared to Spartan I. This datasheet provides information on composition, physical properties, microstructure, tensile properties. It also includes information on forming and joining. Filing Code: SA-738. Producer or source: ArcelorMittal USA.

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TLS S1

Alloy Digest ◽

10.31399/asm.ad.ts0655 ◽

2007 ◽

Vol 56 (9) ◽

Keyword(s):

Fracture Toughness ◽

Wear Resistance ◽

Physical Properties ◽

Carbon Content ◽

High Strength ◽

Heat Treating ◽

High Toughness

Abstract The carbon content in TLS S1, about 0.5%, produces a combination of high strength and high toughness with medium wear resistance. Chisels and rivet sets are typical applications. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on wear resistance as well as heat treating and machining. Filing Code: TS-655. Producer or source: Timken Latrobe Steel.

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