Iron and Steel in Sweden / 25 (1920) - Tema: Business and Economy, Metals Table of Contents / Innehåll | << Previous | Next >>
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Whaling guns.

its compact and uncracked ingots and its splendid Siemens-Martin castings. The processes employed in the Siemens-Martin shop are kept secret.

We give below some figures of the elastic limit tensile strength and elongation in per cent per 100 mm of different grades of steel.

/*
Material Elast Limit Tensile strength Elongation Grade
kg./mm² kg./mm² pr 100 mm.

21 cm. gun, barrel: mouth 39.4 66.6 20.4
» » » » chamber 41.3 67.3 18.3 Cast Gun nickel
» » » Mantles: mouth 41.6 71.7 17.0 steel
» » » » chamber 42.8 71.9 17.5
10.5 » » barrel: mouth 63.8 78.0 15.8
» » » » chamber 60.1 76.0 16.8 Forged special steel
» » » Mantles: mouth 62.6 78.6 17.5 for small guns
» » » » chamber 59.4 76.0 17.0
Armour-plate 56.0 74.0 17.0 { Cast special steel
Air containers for torpedoes 79.2 92.8 20.0[1] { Forged special steel
*/

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