Murder Mystery: Who Killed Yale Student Suzanne Jovin? Message Board

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Pastimes : Murder Mystery: Who Killed Yale Student Suzanne Jovin?

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To: Janice Shell who wrote (520)	3/5/2000 12:36:00 PM
From: James R. Barrett	Read Replies (1) of 1397

Janice, check out this web site. wrcase.com The term "carbon steel" covers a wide range of steel identification. Low carbon steel such as 1018/20 is soft and bendable. It is used for sheet metal on cars and trucks. High carbon steel such as 1045 can be hardened by heating it to a high temperature and quenching it in water. It is used to make knives, wood chisels and wood saws. Stainless steel is made from carbon steel and nickel. Alloy steel and tool steel are made from high carbon steel with chrome, and molybedeum added to make it harder and tougher. Alloy steels are used to make hacksaws, hammers, screwdrivers, wrenches,razor blades, knives and many other tools. Alloy steel will rust but no where near as much as plain carbon steel. The higher the chrome content the less it tends to rust. I am fairly certain that the knife used to kill SJ had an alloy steel blade. Hardened high carbon steel and alloy steel have extremely high tensile strength and fairly low shear strength. In other words it will snap before it bends. If you hammered a stainless steel knife and an alloy steel knife into a 4 X 4 piece wood and then pushed sideways on the handle the stainless steel blade would bend, the alloy steel blade would break because it is so hard. An ordinary spectrograph test could be done on the knife tip to determine the exact chemistry of the steel. The test results could be compared to knife manufacturer's steel formulas. If they find a match they will then know which company made the knife. If the owner registered the knife for warranty purposes then his name should be on file with the manufacturer. For those unfamiliar with a "spectrograph test" it consists of taking a piece of the knife tip and "burning" it in a vacuum chamber. The resulting color spectrum of the "burning" tip will identify the elements and the proportion of each element in the alloy steel. The "burning" is done with a carbon arc. Jim

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