Niobium and Titanium Requirements for Stabilization of Ferritic Stainless Steels / HJ. Dundas, AP. Bond
- Conference Author:
- Intergranual Corrosion of Stainless Alloys (1977 : Toronto, Canada)
- Physical Description:
- 1 online resource (25 pages) : illustrations, figures, tables
- Additional Creators:
- Bond, AP.
American Society for Testing and Materials
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- The amount of niobium or titanium necessary to prevent intergranular attack of the weld zone of autogenously welded 18Cr-2Mo and 26Cr-1Mo alloys containing 0.02 to 0.05 percent (C + N) was determined using the copper-copper sulfate (Cu-CuS04)-16 percent sulfuric acid (H2SO4) test. The study demonstrated that a niobium or titanium level equal to or greater than 0.20 percent 4 (C + N) would produce immunity of 18Cr-2Mo alloys to intergranular attack. The use of the 10 percent oxalic acid etch test and exposure in the 10 percent nitric acid (HN03)-3 percent hydrofluoric acid (HF) test, and in a Cu-CuSO4-50 percent H2SO4 solution, or an acidified 10 percent ferric chloride (FeCl3) solution confirmed both the effectiveness of the Cu-CuS04-16 percent H2SO4 test and the recommended stabilization formula for alloys containing C + N levels of 0.03 percent. In contrast, the ferric sulfate (Fe2(SO4)3)-50 percent H2SO4 test produced grain dropping of the weld zone on alloys that were stabilized according to the other tests. Exposure of selected alloys demonstrated that intergranular attack of unstabilized ferritic alloys can also occur in boiling seawater and boiling formic acid.
- Dates of Publication and/or Sequential Designation:
- Volume 1978, Issue 656 (January 1978)
- 9780803147256 (e-ISBN)
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 15.
- Other Forms:
- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1978. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
- Technical Details:
- Mode of access: World Wide Web.
- Source of Acquisition:
- ASTM International PDF Purchase price USD25.
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