SIFBRONZE WELDING VERSUS THE FUSION PROCESS TN order to provide
Page 24
If you've noticed an error in this article please click here to report it so we can fix it.
proof of the 'relative strength of fusion-welded joints and those formed by the use of Sifbronze welding rod, Suffolk Iron Foundry (1920), Ltd., Stowmarket, was recently responsible for the carrying out of a series of interesting tests.
A fusion weld is one in which the parent metal is brought to a melting temperature at the point of the weld, a mild-steel filler rod being used to 'reinforce the joint; the temperature necessary is approximately 1,450 degrees C.
With the oxy-acetylene process, using Sifbronze, the metal is brought to a red heat and the filler rod is melted on to the hot metal. Welding temperatures in this case are between Ka and 850 degrees C.
Six specimens for each type of joint selected were made, three by fusion welding and three by the use of Sifbronze. Results showed that Sifbronze welding is actually the stronger of the two processes, although, in the case of butt-welded specimens, fusion welding showed a slight superiority to the extent of 94.25 per cent of the strength of the parent metal, as against 93.5 per cent.
Taking the tests as a whole, however, Sifbronze-welded joints gave the following figures: Average maximum stress, 23.52 tons per sq. in.; average efficiency, 90.35 per cent. The equivalent figures for fusion welding were 20.12 tons per sq. in. and 77.41 per cent, average efficiency.
The foregoing is dealt with in an interesting booklet recently published by the maker of Sifbronze welding rods, -copies of which can be obtained from the maker of Sifbronze at the address given.
EMERGENCY SERVICING AT LEYLAND'S PLYMPTON DEPOT CUR the convenience of operators, an emergency service for running repairs has now been established at the depot ot Leyland Motors, Ltd., at Marsh Mills, Plympton. As material supplies become available, service unit stocks wi:1 be built up and held available for customers' requirements. BROADCASTS ON BUSINESS PROSPECTS AND OPPORTUNITIES
BEGINNING on January 15, under the title "Prospects," leading members of various • industries will be brought to the microphone of the B.B.C. to tell listeners what they feel the coming year holds for their particular branches of commerce.
The first speaker will be Sir Miles Thomas, whose talk will be on the Midland Home Service only, at 6.45 p.m. He will, of course, deal with the motor industry and its opportunities.
BOURNEMOUTH COMPANY AS AUSTIN DISTRIBUTOR WE learn that Andrews Bros. (BourneIf Y mouth), Ltd., Holdenhurst Road, Bournemouth, has recently been appointed distributor for Austin commercial vehicles for the Bournemouth area and a considerable territory in West Hampshire and East Dorset. Alterations and extensions are being made to the existing premises to accommodate the new department, which is being especially planned to provide an efficient service to meet the needs of commercial-vehicle operators.