On the basis of the record developed in the subject investigations, the UnitedStates International Trade Commission determines, pursuant to section 735(b) of the Tariff Act of 1930 (19 U.S.C. Section 1673d(b)) (the Act), that an industry in the United States is materially injured by reason of imports from Japan and South Africa of certain small diameter seamless carbon and alloy steel standard, line, and pressure pipe (small diameter pipe), provided for in subheadings 7304.10.10, 7304.10.50, 7304.31.30, 7304.31.60, 7304.39.00, 7304.51.50, 7304.59.60, and 7304.59.80 of the Harmonized Tariff Schedule of the United States, that have been found by the Department of Commerce to be sold in the United States at less than fair value (LTFV). The Commission made negative determinations concerning critical circumstances. The Commission also determines that an industry in the United States is materially injured by reason of imports from Japan of certain large diameter seamless carbon and alloy steel standard, line, and pressure pipe (large diameter pipe), provided for in subheadings 7304.10.10, 7304.10.50, 7304.31.60, 7304.39.00, 7304.51.50, 7304.59.60, and 7304.59.80 of the Harmonized Tariff Schedule of the United States, that have been found by the Department of Commerce to be sold in the United States at LTFV.

关键词：钢铁；管道；进口；南非

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The primary objective of the research project was to investigate alternatives to open grid steel decks. Three alternative deck systems, including aluminum deck, ultra-high performance concrete (UHPC) high-strength steel (HSS) deck, and UHPC-fiber reinforced polymer (FRP) tube deck, were developed and studied in the first phase of the research project. The UHPC-HSS deck showed a great potential to serve as a viable alternative. However, more studies were needed on its components and system design before it was deemed ready to be implemented. Accordingly, this phase of the project covered all the studies needed for the design and implementation of the UHPC-HSS deck system. Also, suitability of an FRP bridge deck system as an alternative to open grid steel decks was evaluated. The UHPC-HSS deck was experimentally investigated at both the component and system levels. Studies included the deck-to-girder connection test for shear and uplift forces, deck-to-deck connection test, multi-unit specimen tests to determine the lateral distribution of live loads, full-scale test for fatigue loading and residual strength, and pullout and beam tests to evaluate the development length. The deck-to-girder and the deck-to-deck connections both proved to be adequate for the loading conditions expected from the HS20 truck and wind forces. Tests for the live load distribution showed that most of the load is taken by the ribs under or immediately next to the load. The deck panels and connections successfully endured two million cycles of repeated loading and had a residual strength beyond their target design load. It was shown that the development length of HSS rebars in UHPC can be reasonably predicted by ACI 408R-03. The dowel action of longitudinal steel reinforcement in UHPC and the uniaxial fatigue behavior of UHPC specimens were also evaluated through both experimental and analytical studies. It was shown that the dowel action would contribute considerably to the shear resistance in reinforced UHPC structures. In another part of the research, an FRP deck system was tested under static and fatigue loading. The FRP deck withstood two million cycles of AASHTO-specified repeated loading with no sign of damage or failure, while its deflection under service load significantly exceeded the deflection limit suggested by AASHTO LRFD.

关键词：钢铁；钢格甲板；可移动的桥梁；轻型甲板；电梯桥梁

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Among underground coal miners, hearing loss remains one of the most common occupational illnesses. To address this problem, the U.S. National Institute for Occupational Safety and Health Office of Mine Safety and Health Research (NIOSH OMSHR) conducts research to reduce the noise emission of underground coal mining equipment, an example of which is the roof bolting machine. Field studies show that, on average, drilling noise is the loudest noise that roof bolting machine operators would be exposed to, and it contributes significantly to the operators noise exposure. OMSHR has determined that the drill steel and chuck radiate a significant amount of noise during drilling. OMSHR and the Corry Rubber Corporation (CRC) have developed a bit isolator that breaks the steel-to-steel link between the drill bit and drill steel and a chuck isolator that breaks the mechanical connection between the drill steel and the chuck. This effectively reduces the noise radiated by the drill steel and chuck and in turn reduces the noise exposure of roof bolter operators. This paper documents the evolution of the bit isolator and chuck isolator. Laboratory testing confirms that production bit and chuck isolators reduce the A-weighted sound level generated during drilling by 3.7 to 6.6 dB.

关键词：钢铁;煤炭开采;听力损失;演习;屋顶螺栓

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Laser etched 300 series Stainless Steel Burst Disks (SSBD) ranging between 0.178 mm (0.007-in.) and 0.508mm (0.020-in.) thick were designed for use in a 17-caliber two-stage light gas launcher. First, a disk manufacturing method was selected using a combination of wire electrical discharge machining (EDM) to form the blank disks and laser etching to define the pedaling fracture pattern. Second, a replaceable insert was designed to go between the SSDB and the barrel. This insert reduced the stress concentration between the SSBD and the barrel, providing a place for the petals of the SSDB to open, and protecting the rifling on the inside of the barrel. Thereafter, a design of experiments was implemented to test and characterize the burst characteristics of SSBDs. Extensive hydrostatic burst testing of the SSBDs was performed to complete the design of experiments study with one-hundred and seven burst tests. The experiment simultaneously tested the effects of the following: two SSBD material states (full hard, annealed); five SSBD thicknesses 0.178, 0.254, 0.305, 0.381 mm (0.007, 0.010, 0.012, 0.015, 0.020-in.); two grain directions relative; number of times the laser etch pattern was repeated (varies between 5-200 times); two heat sink configurations (with and without heat sink); and, two barrel configurations (with and without insert). These tests resulted in the quantification of the relationship between SSBD thickness, laser etch parameters, and desired burst pressure. Of the factors investigated only thickness and number of laser etches were needed to develop a mathematical relationship predicting hydrostatic burst pressure of disks using the same barrel configuration. The fracture surfaces of two representative SSBD bursts were then investigated with a scanning electron microscope, one burst hydrostatically in a fixture and another dynamically in the launcher. The fracture analysis verified that both burst conditions resulted in a ductile overload failure indicated by transgranular microvoid coalescence, non-fragmenting rupture and mixed tensile and shear failure modes, regardless of the material states tested. More testing is underway to determine the relationship between SSBD burst pressure and projectile velocity.

关键词：钢铁;爆破试验;腐蚀;实验设计;激光;不锈钢

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关键词：钢铁；金属加工；海军舰艇；磨具；合金

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Accordingly, effective March 1, 2012, the Commission instituted countervailing duty investigation No. 701-TA-489 and antidumping duty investigation No. 731-TA-1201 (Preliminary). Notice of the institution of the Commissions investigations and of a public conference to be held in connection therewith was given by posting copies of the notice in the Office of the Secretary, U.S. International Trade Commission, Washington, DC, and by publishing the notice in the Federal Register of March 7, 2012 (77 FR 13631). The conference was held in Washington, DC, on March 22, 2012, and all persons who requested the opportunity were permitted to appear in person or by counsel.

关键词：钢铁；不锈钢；国际贸易；冲压不锈钢水槽

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The Savannah River Site (SRS) is storing plutonium (Pu) materials in the K-Area Materials Storage (KAMS) facility. The Pu materials were packaged according to the DOE-STD-3013 standard and shipped to the SRS in Type B 9975 packages. The robust 9975 shipping package was not designed for long-term product storage, but it is a specified part of the storage configuration and the KAMS facility safety basis credits the 9975 design with containment. Within the 9975 package, nested stainless steel containment vessels are closed with dual O-ring seals based on Viton GLT or GLT-S fluoroelastomer. The aging behavior of the O-ring compounds is being studied to provide the facility with advanced notice of nonconformance and to develop life prediction models. A combination of field surveillance, leak testing of surrogate fixtures aged at bounding service temperatures, and accelerated-aging methodologies based on compression stress-relaxation and oxygen consumption analysis is being used to evaluate seal performance. A summary of the surveillance program relative to seal aging behavior is presented.

关键词：氟橡胶；O型圈；密封件（塞子）；放射性物质

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In 1997, the first two United States Department of Energy (US DOE) high level waste tanks (Tanks 17-F and 20-F: Type IV, single shell tanks) were taken out of service (permanently closed) at the Savannah River Site (SRS). In 2012, the DOE plans to remove from service two additional Savannah River Site (SRS) Type IV high-level waste tanks, Tanks 18-F and 19-F. These tanks were constructed in the late 1950s and received low-heat waste and do not contain cooling coils. Operational closure of Tanks 18-F and 19-F is intended to be consistent with the applicable requirements of the Resource Conservation and Recovery Act (RCRA) and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and will be performed in accordance with South Carolina Department of Health and Environmental Control (SCDHEC). The closure will physically stabilize two 4.92E+04 cubic meter (1.3 E+06 gallon) carbon steel tanks and isolate and stabilize any residual contaminants left in the tanks. The closure will also fill, physically stabilize and isolate ancillary equipment abandoned in the tanks. A Performance Assessment (PA) has been developed to assess the long-term fate and transport of residual contamination in the environment resulting from the operational closure of the F-Area Tank Farm (FTF) waste tanks.

关键词：钢铁；放射性废物贮存罐；水泥；灌浆

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Pyrotechnic smoke compositions for visual obscuration containing boron carbide, potassium nitrate, potassium chloride, and various lubricants are described. Only the waxy lubricants stearic acid and calcium stearate slowed the burning rate into a range suitable for end-burning smoke grenades. For compositions pressed into steel cans, the addition of just 2 wt percent calcium stearate was shown to reduce the burning rate from 0.50 cm/s to 0.09 cm/s. In this system, potassium chloride serves as a diluent that reduces incandesence but also increases slag formation. Compositions containing potassium chloride in the 25-30 wt percent range exhibited both acceptably low incandescense and slag formation upon burning, while also producing copious amounts of white smoke. These experimental compositions were loaded into full-size grenade cans; field and smoke chamber testing revealed that they outperform the US Army s in- service M83 TA grenade both qualitatively and quantitatively. The photopic mass- based figures of merit for experimental grenades KCl-25, KCl-30, and a production-run M83 TA grenade were 2.51, 2.19, and 1.44 m2/g, respectively.

关键词：钢铁;碳化硼;氯化钾;烟雾弹药

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The paper presents experimental data generated for calibrating finite element models to predict the performance of reinforced concrete panels with a wide range of construction details under blast loading. The specimens were 1.2 m square panels constructed using Normal Weight Concrete (NWC) or Fiber Reinforced Concrete (FRC). FRC consisted of macro-synthetic fibers dispersed in NWC. Five types of panels were tested: NWC panels with steel bars; FRC panels without additional reinforcement; FRC panels with steel bars; NWC panels with glass fiber reinforced polymer (GFRP) bars; and NWC panels reinforced with steel bars and external GFRP laminates on both faces. Each panel type was constructed with three thicknesses: 152 mm, 254 mm, and 356 mm. FRC panels with steel bars had the best performance for new construction. NWC panels reinforced with steel bars and external GFRP laminates on both faces had the best performance for strengthening or rehabilitation of existing structures. The performance of NWC panels with GFRP bars was strongly influenced by the bar spacing. The behavior of the panels is classified in terms of damage using immediate occupancy, life safety, and near collapse performance levels. Preliminary dynamic simulations are compared to the experimental results.

关键词：钢铁；混凝土；纤维；玻璃纤维；性能

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