...must 11. Steel.—The quality of steel shall be such that the tensile strength be not less than 'Jli tons per square inch, with an elongation of not less than 20 per cent, in a length of 8 inches. The work when finished shall be of the best description, the steel being of Landore,...

...fracture. Lloyd's rules for steel boilers state that the minimum tenacity of the material should be 26 tons per square inch, with an elongation of not less than 20 per cent, in a length of 8 inches. The maximum tenacity allowed by these rules varies with the thickness of the plates,...

...should not be less than 20 tons tensile strength, and should not exceed 80 tons, and it recognizes 28 tons per square inch, with an elongation of not less than 20 per cent, in 10 inches, as a good tensile strength. Lloyd's recognize steel from 20 tons to 30 tons as suitable...

...MARINE STEAM-ENGINE Eivet bars and rivets.—The tensile strength of rivet bars should be from 26 to 30 tons per square inch, with an elongation of not less than 25 per cent, in a length of 10 inches. The rivets before being tested should be carefully prepared,...

...of Trade requirements are that tensile strength shall lie between 54,000 and 60,000 pounds per ire inch, with an elongation of not less than 20 per cent, in 10 íes. Steel which has been welded or worked in the fire should be used. 'ubes.—If wrought iron...

...MARINE STEAM-ENGINE Rivet bars and rivets.—The tensile strength of rivet bars should be from '26 to 30 tons per square inch, with an elongation of not less than 25 per cent, in a length of 10 inches. The rivets before being tested should be carefully prepared,...

...capable of bearing not IMS than 60,000 and not more than 70,000 'pounds per square inch at breaking, with an elongation of not less than 20 per cent, in a length of 8 inches. A bar should bend when cold through an angle of 180°, and close down upon iteelf...

...quality :— The steel bars from which the rivets are made must stand a tensile test of between 26 and 30 tons per square inch, with an elongation of not less than 25 per cent. in 8 in. For the bending test, the bar, either cold or heated as for mild steel, must...

...piece. For bars for combustion chamber stays the tensile breaking strength shall be between 26 and 30 tons per square inch, with an elongation of not less than 23 per cent, measured on the standard test piece. For material under -375 in. in thickness the elongation...

...the Board of Trade requirements are that ile strength shall lie between 54,000 and 60,000 pounds per inch, with an elongation of not less than 20 per cent, in 10 Steel which has been welded or worked in the fire should i sed. is.—If wrought iron is used, it...