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FLAT ROLLED SHEETS OF INVAR A NICKEL-IRON ALLOY. THE SIZE IS 50MM X 500 MM. THE THICKNESS IS 0.5MM. THE COMPOSITION IS 36% NICKEL AND IRON BALANCE. IT ALSO CONTAINS COBALT 0.05% SILICON 0.4% SULFUR 0.015 AND CHROMIUM 0.25. THE PRODUCT IS COLD ROLLED AND HAS A LOW THERMAL EXPANSION AND IS USED AS A GLASS SEALING ALLOY AS IT MATCHES ITS THERMAL EXPANSION COEFFICIENT.

NON-ALLOY STEEL STRIP, COLD-ROLLED, HARDENED AND TEMPERED. OF A THICKN ESS 0.114 TO 0.183MM. WIDTH 8 TO 26MM. COMPOSITION: CONTAINING BY WEIG HT - CARBON 0.6 TO 0.95 PERCENT, SILICON 0.18 TO 0.22 PERCENT, MANGANE SE 0.4 TO 0.9 PERCENT, PHOSPHORUS 0.004 TO 0.016 PERCENT, SULPHUR 0.00 2 TO 0.005 PERCENT. SEMI-FINISHED. TO BE PAINTED AND PRINTED TO MANUFA CTURE A TAPE MEASURE.