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The Express 27 is an ultralight displacement recreational keelboat, built predominantly of vacuum bag moulding vinylester, S-glass, E-glass, Klegecell foam and a balsa core, with wood trim. It has a fractional sloop or optional masthead sloop rig, a raked stem , a reverse transom , an internally mounted spade-type rudder controlled by a tiller ...
The SAE steel grades system is a standard alloy numbering system (SAE J1086 – Numbering Metals and Alloys) for steel grades maintained by SAE International. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels. These efforts were similar ...
The J/27 is a keelboat built by J/Boats. It is both a weekend cruiser and a One-Design racing class with strict class rules. Designed with a low, heavy keel with a generous sail area, the boat gives good handling in both light and strong winds, but struggles in moderate winds.
In addition to the descriptive steel grade naming system indicated above, within EN 10027-2 is defined a system for creating unique steel grade numbers. While less descriptive and intuitive than the grand names they are easier to tabulate and use in data processing applications.
Two Express 37s on San Francisco Bay Express 27 on San Francisco Bay. The Alsberg brothers founded their company to build the Express 27, one of the first designs to be built using the vacuum bag moulding process. This boat was intended to compete with designs like the Moore 24 and the Olson 30 as an ultralight racer. Earlier designs in this ...
The equivalent carbon content concept is used on ferrous materials, typically steel and cast iron, to determine various properties of the alloy when more than just carbon is used as an alloyant, which is typical. The idea is to convert the percentage of alloying elements other than carbon to the equivalent carbon percentage, because the iron ...
Hiduminium or R.R. alloys (2% copper, iron, nickel): used in aircraft pistons Hydronalium (up to 12% magnesium, 1% manganese): used in shipbuilding, resists seawater corrosion Italma (3.5% magnesium, 0.3% manganese): formerly used to make coinage of the Italian lira
Direct-reduced iron has about the same iron content as pig iron, typically 90–94% total iron (depending on the quality of the raw ore) so it is an excellent feedstock for the electric furnaces used by mini mills, allowing them to use lower grades of scrap for the rest of the charge or to produce higher grades of steel.