Profiled steel sheet

Figure 7.47 A quantitative GD depth profile of a painted, galvanized steel sheet. This profile shows an initial layer containing Ti, Si, C, H, and O. The paint is white, so titania and silica are probable ingredients and latex paints would certainly contain hydrocarbons. An intermediate layer containing Sr and Cr is seen, then the third layer (with the Zn peak) shows the galvanization and the increasing Fe signal shows where the steel base begins. [Courtesy of Jobin Yvon, Inc., Horiba Group, Edison, NJ (www.jyhoriba.com).]...

Used to cut metaK particularly where the sheet cannot be taken to a guillotine or where profiles have to be cut. Electric or air-operated shears are available capable of cutting steel sheet up to 2 mm thick by means of the scissor-like action of a reciprocating blade, Fig. 2.21(e). 

Fig. 108. Depth-profile through a galvanized steel sheet surface. The Zn coating is 18 pm thick, and the Al concentration in the bulk is 0.049%. The voltage U increases from 510 V in the Zn to 740 V in the bulk steel, (a) Zw (b) Al (c) Fe (Reprinted with permission from Ref. [481].)...

These results confirm the experience obtained with steel sheet pilings in the seawater of Kure Beach in which the corrosion profile shown schematically here in Figure 17 was found after 5 years [55],... 

The advantage of salt spray or immersion tests is that they test rather realistic assemblies that are close to that of an actual structure, for example, profiles or sheet joined with bolts in stainless steel. 

The main structure of seat backs is traditionally made of metal. This is often a tubular steel fi ame, wifli various brackets and reinforcemaits attached by welding or mechanical fasteners. The central section of the fi-ame is normally closed using steel sheet, which may have contours to provide added stiflhess. In some cases, the frame is formed by welding steel profiles around the perimeter of a main steel sheet. Often the seat back can be folded down to allow more space for luggage, forming a load floor surface. The foam is traditionally attached to the steel structure and must form the shape, which intofaces with the occupant, and provide the fore-aft and lateral support and comfort. 

Profiling - Sheet steel may be pressed into the correct shape for crash barriers or the cladding of buildings (known as profiling). 

Some new applications were showcased at the American Composites Manufacturers Association annual conference, Composites Polycon 2007, in Tampa, Florida. These included scaffolding for the construction industry and a new steel-free concrete deck (see Fig. 12.14). Creative Pultrusions Inc. has developed a tough, hght and more corrosion resistant composite sheet piling system (Fig. 12.15) named SuperLoc profiles. These profiles consist of polyester resin matrix with more than 100 fibreglass rovings in the core, plus two phes of continuous strand mat. SuperLoc so far has been utilized in more than 20 shorelines in the United States (Black, 2004). 

Continuously working double-belt presses are most suitable for an industrial, inexpensive and time-saving application of hot-compaction exclusively for continous profiles or flat sheets. These systems fixate the self-reinforced semifinished textile products between two tempered, continuously running steel belts and press them according to the predefined thickness and compaction degree requirements [58]. Conventional, isostatic hydraulic presses are suitable for smaller quantities (see Figure 22.5). 

---