Carbon Steel 1040 Essay Example | Topics and Well Written Essays - 500 words

Carbon Steel 1040 - Essay Example The delivery times taken by the mills ranges between 10 and 50 weeks after the placement of order depending upon the form and size of steel required. Carbon Steels 1040 is primarily stocked by 12 distributors in Bar Products, though it is also, to some extent, available in tubular products, wire products, fasteners, forging products, and flat rolled products. The principle design feature of Carbon Steels 1040 includes its higher carbon content i.e. 0.4 per cent that lends it more strength as compared to the lower alloys of carbon (â€Å"Carbon Steels 1040†). Carbon Steels 1040 are given heat treatment to make them hard. They are quenched and tempered so that a tensile strength from 150 ksi to 250 ksi can be developed in them (â€Å"Carbon Steels 1040†). It has good machinability since it is rated at 60 per cent machinability given by the 1112 alloy that is employed as 100 per cent rated steel for machining (â€Å"Carbon Steels 1040†). Carbon Steels 1040 forming gets quickly accomplished in the annealed condition. It can be welded using any method of welding. However, its higher content of carbon imparts the need to use pre-heat and post-heat practice at 300 to 500 F and 1100 to 1200 F respectively according to a verified procedure of welding. Carbon Steels 1040 show good response to the hardening at 1550 to 1650 F achieved by heat treatment when the heating is followed by water quench as well as tempering (â€Å"Carbon Steels 1040†). This helps attain the desired level of strength in the steel. One problem with Carbon Steels 1040 is that the higher carbon content makes it very brittle and hard. Increased carbon affects the temperature where the forming of martensite commences (see fig.1.). At lower temperature, steel is less plastic and not very capable of accommodating the changes in volume linked with the changing to martensite. Increased brittleness in the steel subjects it to cracking and distortion. However, increased concentration on the materials that

Latino dropouts Essay Example | Topics and Well Written Essays - 1000 words

Latino dropouts - Essay Example In 2000, about 530,000 Hispanic 16- 19 year olds were classified as dropouts, a percentage of 21.1. However, many of these were recently arrived immigrants who had not been in the US education system. So the actual figure for drop out of the US schools is about 15%. In 2000 the Latino dropout rate was three times greater than for non-Hispanic whites. The percentage of Latinos completing higher education has also consistently lagged behind whites and African Americans. It is also important to consider that the rate of dropouts could change at any time since some students presently enrolled in high schools can drop out at any time, and some drop outs could obtain their GED at any time in the future. Several factors have been suggested to explain the high rate of dropouts. The major factor has been the language, but Adam (2003)2 describes how researcher Saenz breaks down the factors into â€Å"individual factors, family-related factors and the structural level†. The individual factors have to do with the student’s own academic expectations and performance, peer pressure, generational status and acculturation. But one big effect comes from lifestyle where they are forced to become adults too early in life either through early pregnancy or having to help with looking after younger siblings. The strongest family factor seems to be the socioeconomic status of the family since having the resources to navigate the system makes a difference to the success of the students. The economic context in which the students and the school reside can place a strain on the family to keep up. Also the connection between the family, school and culture is important. The language plays a big part in this connection. Other school practices such as tracking, grade retention and unequal treatment of minority students all are common causes of dropout. Jones and Bou-Waked (2007)3 add to the discussion of the part that language plays in the dropout crisis. They noted that about