《新京报》03月03日报道，在库存高企、需求不振和“压钢治霾”等多重不利因素影响下，春节后国内钢市依旧惨淡，迟迟不见好转。最新数据显示，2月份国内钢铁行业PMI指数为39.9%，较上月回落0.8个百分点。这一指数已连续3个月下降。在钢材产量和价格持续回落之外，需求低迷的态势也没有改观。2月份，钢铁业新订单指数为32.4%，环比回落1.1个百分点，连续6个月处于50%以下的收缩区间。

This thesis utilized the diffusion couple approach to evaluate the addition of molybdenum, niobium, tantalum, and tungsten to 316 stainless (316SS) and alloy HT9 steels. Refractory elements have been previously studied as alloying candidates to mitigate problems such as radiation-induced segregation, void swelling, and irradiation creep in reactor steels. Diffusion couples were characterized via energy dispersive x-ray spectroscopy (EDS) and nanoindentation to examine refractory element solubility, diffusivity, and the effects these elements have on hardness and elastic modulus in 316SS and alloy HT9.

The Center for Nondestructive Evaluation at Iowa State University has experience in development of measurement techniques and new sensors using a variety of interrogating energies. This research evaluated feasibility of three technologies—x-ray radiation, groundpenetrating radar (GPR), and magnetic flux leakage (MFL)—for detection and quantification of corrosion of embedded reinforcing steel.The methods provide useful and complementary information. GPR provides a rapid approach to identify reinforcing steel that has anomalous responses. MFL provides similar detection responses but could be optimized to provide more quantitative correlation to actual condition. Full implementation could use either GPR or MFL methods to identify areas of concern, followed by radiography to give a visual image of the actual condition, providing the final guidance for maintenance actions.

This program was undertaken to develop a microalloy-modified grade of standard carburizing steel that can successfully exploit the high temperature carburizing capabilities of current commercial low pressure (i.e. 'vacuum') carburizing systems.

This Manual covers the relevant issues related to orthotropic steel deck bridge engineering, including analysis, design, detailing, fabrication, testing, inspection, evaluation, and repair.

This project consisted of determining how to manufacture burst disks out of stainless steel shim stock, devising a fixture to reliably laser etch the surface of the SSBDs, determining parameters for the laser etching, test the SSBDs for reliability and calibrating them for burst pressure, implementing the SSBDs into the 17-cal launcher, modifying existing launcher components, and finally evaluating SSBD’s effect on launcher performance.

The reliability of structure components, particularly resistance to damage and failure in the intended service environment, is highly dependent on the selected materials. An effective surveillance program is also necessary to monitor the material degradation during the course of service. Steels have been proven to be desirable for hydrogen infrastructure. However, hydrogen embrittlement is an important factor that limits steel performance under high-pressure hydrogen conditions.In order to reach the above goal, we have proposed an innovative technology, based on spiral notch torsion test (SNTT) methodology, to effectively investigate the material performance of X52 pipeline steel.

The primary objective of this effort is to demonstrate and validate citric acid as an alternative to nitric acid for the passivation of stainless steels.The primary objective of this effort is to demonstrate and validate citric acid as an alternative to nitric acid for the passivation of stainless steels.This project will use the results from that testing to determine what process parameters will be used in the preparation of test coupons. This Test Protocol contains the critical requirements and tests necessary to qualify citric acid as an alternative to nitric acid for use at KSC.

This report contains the analysis and retrofit of a steel truss bridge on KY 974 over Howard Creek in Clark County, Kentucky. The bridge had major corrosion and damage to the steel stringers, along with cracking and leaching occurring in the concrete bridge deck.