 | 1873 - 324 Seiten
...Miller & Smith , " " 112 0. W. Child " " 262 TESTS OF STEEL AND IRON. (Scientific American.) Nitric acid will produce a black spot on steel ; the darker...its soft state has a curved fracture and a uniform gn-y lustre ; in its hard state a dull, silvery, uniform white. Cracks, threads, or sparkling particles... | |
 | George Bower - 1880 - 218 Seiten
...Hard and brittle Very light grey, with radiating crystal; . . . Extremely hard and brittle. Nitric acid will produce a black spot on steel; the darker...its soft state has a curved fracture and a uniform grey lustre ; in its hard state a dull, silvery, uniform white. Cracks, threads, or sparkling partirles... | |
 | Walter S. Hutton - 1885 - 486 Seiten
...slightly hammer. To distinguish Steel from Iron. — Nitric acid does not affect iron, but produces a black spot on steel. The darker the spot the harder the steel. To harden Hammers and other Tools. — Bone dust, 2 parts ; common salt, 3 ; burnt leather shreds,... | |
 | William A. Morrison - 1895 - 204 Seiten
...the limit of welding steel ; 20 gives the lowest limit of cast iron. To TEST STEEI, AND IRON. Nitric acid will produce a black spot on steel; the darker...Iron, on the contrary, remains bright if touched with nii.ri'- acid. Good steel in its soft state has a curved fracture and a uniform gray lustre; in its.... | |
 | Henry O'Connor - 1901 - 498 Seiten
...hot-short iron. Good iron is readily heated soft under the hammer, and throws out but few sparks. Nitric acid will produce a black spot on steel ; the darker...its soft state has a curved fracture and a uniform grey lustre ; in its hard state, a dull, silvery, uniform white. Cracks, thread, or sparkling particles... | |
 | Walter S. Hutton - 1901 - 552 Seiten
...slightly hammer. To distinguish Steel from Iron. — Nitric acid docs not affect iron, but produces a black spot on steel. The darker the spot the harder the steel. To harden Hammers and other Tools. — Bone dust, 2 pans; common salt, 3 ; burnt leather shreds, I... | |
 | Albert Allis Hopkins - 1901 - 734 Seiten
...test iron and steel : Nitric acid will produce a hiark spot on steel; the darker the spot, the hauler the steel. Iron, on the contrary, remains bright if touched with nitric acid. <«ood steel in its soft state has a curve'! fracture and a mill orm gray luster, in its hard state,... | |
 | Leonard Elliott Brookes - 1906 - 664 Seiten
...ordinary steel, the carbon of which is replaced by other chemical elements. To test steel and iron. Nitric acid will produce a black spot on steel, the darker...silvery, unifo'rm white. Cracks, threads or sparkling partieles denote bad quality. Good steel will not bear a white heat without falling to pieces, and... | |
 | Calvin Franklin Swingle, Frederick John Prior - 1906 - 676 Seiten
...ordinary steel, the carbon of which is replaced by other chemical elements. To test steel and iron. Nitric acid will produce a black spot on steel, the darker...nitric acid. Good steel in its soft state has a curved fraoture and a uniform gray lustre, in its hard state a dull, silvery, uniform white. Cracks, threads... | |
 | William Henry Dooley - 1915 - 364 Seiten
...Steel may be recognized by the appearance of a dark spot when nitric acid is placed on its surface. The darker the spot, the harder the steel. Iron, on the contrary, shows no sign when touched with nitric acid. Good steel will not stand a high heat, but will crumble... | |
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Nitric acid will produce a black spot on steel ; the darker the spot the harder the steel. Iron, on the contrary, remains bright if touched with nitric acid. Good steel in its soft state has a curved fracture and a uniform grey lustre ; in its hard state,... 
