Anticorrosive bellows
First Claim
1. An anticorrosive bellows made of stainless steel consisting essentially of 0.10% by weight or less of C, 2.5-5% by weight of Si, 2% by weight or less of Mn, 15-20% by weight of Cr, 10-22% by weight of Ni, 10 times or more as much as the C content but at most 2.5% by weight of at least one element selected from the group consisting of Ta, Zr and a mixture of Nb with Ta or/and Zr, and the remainder consisting substantially of Fe.
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Abstract
An anticorrosive bellows made of stainless steel containing 0.10% by weight or less of C, 2.5-5% by weight of Si, 2% by weight or less of Mn, 15-20% by weight of Cr, 10-22% by weight of Ni, 10 times or more as much as the C content but at most 2.5% by weight of at least one element selected from the group consisting of Ta and Zr, and the remainder consisiting substantially of Fe shows excellent corrosion resistance even under strongly corrosive circumstances, e.g. fuming or concentrated nitric acid. Said stainless steel has improved workability, weldability and endurance and the produced bellows can be used as a bellows valve, a bellows joint, and the like.
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Citations
3 Claims
- 1. An anticorrosive bellows made of stainless steel consisting essentially of 0.10% by weight or less of C, 2.5-5% by weight of Si, 2% by weight or less of Mn, 15-20% by weight of Cr, 10-22% by weight of Ni, 10 times or more as much as the C content but at most 2.5% by weight of at least one element selected from the group consisting of Ta, Zr and a mixture of Nb with Ta or/and Zr, and the remainder consisting substantially of Fe.
Specification
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- Resources
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Current AssigneeSumitomo Chemical Company Limited
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Original AssigneeSumitomo Chemical Company Limited
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InventorsOkubo, Masao, Miki, Masayoshi, Hoshino, Taiji
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Primary Examiner(s)Steiner, Arthur J.
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Application NumberUS05/907,345Time in Patent Office516 DaysField of Search75/128 G, 75/128 C, 75/128 Z, 29/454, 113/116 B, 72/54US Class Current420/51CPC Class CodesC22C 38/26 with niobium or tantalumC22C 38/28 with titanium or zirconiumF16J 3/047 Metallic bellowsY10T 29/49877 of flexible wall, expansibl...
