What is the magnetic permeability of iron?

✍ Scribed by T.D. Yensen

• Publisher: Elsevier Science
• Year: 1928
• Tongue: English
• Weight: 312 KB
• Volume: 206
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(28)90558-x

✦ Synopsis

This paper is a review of the changes brought about in the magnetic properties of "iron" during the period I87o to I928 and shows the absurdity of using "iron" as a standard for comparison. The latest (I928) value for the initial permeability (~0) of "iron" is given as I i5o , its maximum permeability (~max) as 6I,ooo, and its hysteresis loss (Wh) as 3o0 ergs per cubic centimeter per cycle for B = IO,OOO gausses. The corresponding values prior to 19oo were: ~0 = 250 /Zmax = 2600, Wh = 3,000. * Armco Ingot Iron is used for comparison because of its excellent magnetic properties particularly at high inductions for which the permeability approaches that for vacuum fused electrolytic iron.