Use of wrought and cast materials and welding fillers for...

Details Use of wrought and cast materials and welding fillers for... Use of wrought and cast materials and welding fillers for...

C - Chemistry, Metallurgy

01

B

C01B 17/90 (2006.01) B01D 53/14 (2006.01) B01J 19/02 (2006.01) C01B 17/80 (2006.01) C22C 38/34 (2006.01) C22C 38/40 (2006.01) C22C 38/44 (2006.01) C22C 38/50 (2006.01)

Patent

CA 2094459

Use of wrought and cast materials and welding fillers for making and using hot concentrated sulphuric acid or oleum A B S T R A C T In a process such as the preparation of sulphuric acid wherein a wrought or cast material or a welding filler is contacted with hot concentrated sulphuric acid or oleum of up to 10 wt-%, the improvement which comprises forming the contact portion of said wrought or cast material or said filler of an austenitic iron-nickel- chromium-silicon alloy comprising about 15.5 to 17.5 wt-% nickel to 12 wt-% chromium 5.7 to 6.5 wt-% silicon up to max. 0.06 wt-% carbon up to max. 1.5 wt-% manganese up to max. 0.03 wt-% phosphorus up to max. 0.03 wt-% sulphur up to max. 0.15 wt-% titanium up to max. 0.8 wt-% zirconium up to max. 0.2 wt-% nitrogen and up to max. 0.3 wt-% molybdenum and the remainder iron, together with minimal quantities of normally present impurities, including the dexidizing elements magnesium, aluminum and calcium. Le A 28 885

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