ATI 2003

ATI 2003 (UNS S32003) is a molybdenum-enhanced lean duplex stainless steel (LDSS) that was developed to fill the performance gap between type 316L (UNS S31603) and 2205 duplex (UNS S32205) stainless steels. ATI 2003 has reduced alloy content, which makes it less costly than 2205 duplex, yet ATI 2003 retains the high strength level characteristic of duplex grades. Compared to type 316L, ATI 2003 has increased strength, better corrosion resistance, and greater cost stability. These and other factors make ATI 2003 an attractive alternative for a variety of applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1335. Producer or source: ATI.

Anaerobic/aerobic integration via UASB/enhanced aeration for greywater treatment and unrestricted reuse

The aim of the present study is to achieve an efficient treatment of greywater for reuse in food crops' irrigation. For this purpose, anaerobic followed by enhanced aerobic treatment system was examined via both bench scale and pilot plant. The greywater was separated and collected from the source. The examined systems consisted of Up flow Anaerobic Sludge Blanket (UASB) followed by anaerobic aeration enhanced by Effective Microorganism (EM). The characteristics of the raw greywater were within a high strength level due to the presence of detergents, phosphates, oil and grease. The BOD5/COD was 0.75, showing that biological treatment to this greywater could be achieved. Treatment with UASB showed high elimination of oil & grease, BOD5, COD, total phosphates, and TKN in the range of 60 to 84%. However, TSS and ammonia were poorly removed. UASB effluent was further aerobically treated in a continuous aerated system where the predetermined optimum EM dose was added. Both aeration time and EM dose were previously examined to reach the optimum. Anaerobic/aerobic pilot plant in the continuing treatment was evaluated, where the final treated effluent successfully reached the permissible limits for unrestricted reuse according to the international regulation, namely FAO, WHO, US EPA and Egypt.

Hydrogen Assisted Tempered Martensite Embrittlement of Ultra High Strength Martensitic Steel

The demand for new materials that provide excellent structural performance while reducing weight and being cost-effectively manufactured is increasing. For applications with high strength requirements, ultra-high strength steels (UHSS) have been widely used. However, with such a high strength level, UHSS are very sensitive to the hydrogen that could be ease by the tempering process. In this research, the correlation of hydrogen and tempering process on commercial UHSS 15B30 has been studied. Results show that the tensile strength (TS) of as-quenched 15B30 is about 1900MPa. After tempering treatment of the quenched 15B30, the TS decreases from 1600MPa to 1200MPa with tempering temperature increased from 200°C to 400°C. The 15B30 specimens, being subjected to hydrogen charge, exhibit the dramatic reduction of mechanical strengths.

Welding of Ultra High Strength Steels

The ongoing need to reduce the weight of products while increasing strength has resulted in new generation steel manufacturing using special heat treatments to produce High Strength Steels (HSS) and Ultra High Strength Steels (UHSS) with up to 1700 MPa tensile strength. The high strength level of these steels makes it possible to produce structures with a considerable weight and cost reduction, and such steels have been adopted in the automotive industry and for mobile heavy equipment. Welding of UHSS is, however, not without its complications and welding processes for these steels need careful attention. For instance, their high susceptibility to cracking and Heat Affected Zone (HAZ) softening are risks that need to be borne in mind when choosing welding parameters. This research work discusses the difficulties and challenges of successful welding of UHSS. Common welding methods used in welding of UHSS are briefly reviewed to gain a better understanding of the effects of different welding parameters and methods. The paper finds that UHSS can be satisfactorily welded with laser welding, electron beam welding, resistance welding, and conventional arc welding methods, but the quality of the weld is dependent on appropriate control of several parameters and variables of the welding processes.

Study on Drying Shrinkage Properties of Concrete Using Blast Furnace Slag as Fine Aggregate

In this paper, the experiment about drying shrinkage of concrete using blast furnace slag as fine aggregate was introduced. In this experiment, blast furnace slag fine aggregates that were produced by two different steel factory and natural river sands that came from two different producing area were been used, and compressive strength of concrete for testing were four levels from ordinary strength level to high strength level. As results, the drying shrinkage of concrete that used blast furnace slag as fine aggregate is less than concrete that used natural river sand as fine aggregate when the mix proportion condition of concrete was identical. The relationship between drying shrinkage and age of drying of concrete that used blast furnace slag as fine aggregate could be described by same approximated curve equation that was used for the concrete using natural river sand as fine aggregate. As same as concrete using natural river sand, the drying shrinkage of concrete that used blast furnace slag as fine aggregate would decrease with decreasing of water cement ratio.

Microstructure and Mechanical Properties of Cold-Rolled TRIP Steel Sheets

Transformation induced plasticity (TRIP) steels have complex multiphase microstructure composed of ferrite, bainite and retained austenite [1]. These metastable retained austenite can transforms into martensite during plastic deformation, which generates a TRIP effect resulting in excellent combination of high strength and ductility even at high strength level [2-5]. For this reason, the TRIP-aided steel sheets are suitable to fabricate automobile parts, as they can offer excellent formability without sacrifice the strength and safety requirement of the steel sheets. As a result, the development of TRIP-aided steels has been a very important issue in the automobile field.

ARMCO FORMABLE 70 HR

ARMCO FORMABLE 70 HR is a hot-rolled steel with excellent ductility, weldability and edge-tear resistance at a minimum yield strength of 70,000 psi (483 MPa). For this relatively high strength level, it has unusually good fabricating properties that are the result of closely controlled processing of a fully killed, low-carbon, vacuum-degassed, columbium-alloyed steel. This special composition and processing practice minimize harmful nonmetallic inclusions that hamper formability. Typical applications include automotive reinforcements, truck parts and construction components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-359. Producer or source: Armco Inc., Eastern Steel Division.

USS STRUX

USS STRUX is an alloy steel designed for use in the heat treated condition at a minimum tensile strength of 280,000 psi. At this very high strength level the steel has adequate ductility and notch toughness for critical applications. This datasheet provides information on composition and tensile properties. Filing Code: SA-100. Producer or source: United States Steel Corporation.

ELEKTRON AZM

ELEKTRON AZM is a magnesium extrusion alloy having a high strength level. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Mg-45. Producer or source: Magnesium Elektron Ltd.