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10342 Properties of a New Lean Duplex Alloy

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A new, lean duplex stainless steel with low nickel content was tested, in both as-welded and mill-annealed conditions, to determine its resistance to corrosion in many environments.

Product Number: 51300-10342-SG
ISBN: 10342 2010 CP
Author: John F. Grubb, Bahri Ozturk, David S. Bergstrom, and John J. Dunn
Publication Date: 2010
Industry: Materials Selection and Design
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A new, lean duplex stainless steel with low nickel content has been developed. This alloy, UNS S82011, has mechanical and corrosion properties superior to Type 304L stainless steel, and was developed to be used as a high-strength substitute for Type 304L stainless steel. In some environments it shows corrosion resistance as good as Type 316L stainless steel. The composition of S82011 alloy (nominally 21%Cr, 1.5% Ni, 2.8% Mn, and 0.2% N, balance Fe) provides this alloy with outstanding resistance to a broad range of corrosive environments.

S82011 alloy was tested, in both as-welded and mill-annealed conditions, to determine its resistance to corrosion in many environments. Its resistance to intergranular attack was measured using ASTM A262 Practices B, C and E. The corrosion resistance of this alloy was also determined in various boiling acid solutions, and compared to that for Type 304L, 316L, and similar stainless steels.

The critical pitting temperature (CPT) and critical crevice corrosion temperature (CCCT) of the new alloy were determined using ASTM G150 and ASTM G48 Practice B and the results are compared to those for Types 304L and 316L stainless steel.

Stress corrosion cracking (SCC) behavior was also investigated in several different chloride environments, and compared to other alloys.

The relevance of the above corrosion data will be related to the probable performance of the new duplex stainless steel in corrosive environments present in downhole environments as well as in the chemical process industries.

KEYWORDS: Lean Duplex, Stainless Steel, UNS S82011, S32003, Corrosion, Mechanical Properties, Stress Corrosion Cracking

A new, lean duplex stainless steel with low nickel content has been developed. This alloy, UNS S82011, has mechanical and corrosion properties superior to Type 304L stainless steel, and was developed to be used as a high-strength substitute for Type 304L stainless steel. In some environments it shows corrosion resistance as good as Type 316L stainless steel. The composition of S82011 alloy (nominally 21%Cr, 1.5% Ni, 2.8% Mn, and 0.2% N, balance Fe) provides this alloy with outstanding resistance to a broad range of corrosive environments.

S82011 alloy was tested, in both as-welded and mill-annealed conditions, to determine its resistance to corrosion in many environments. Its resistance to intergranular attack was measured using ASTM A262 Practices B, C and E. The corrosion resistance of this alloy was also determined in various boiling acid solutions, and compared to that for Type 304L, 316L, and similar stainless steels.

The critical pitting temperature (CPT) and critical crevice corrosion temperature (CCCT) of the new alloy were determined using ASTM G150 and ASTM G48 Practice B and the results are compared to those for Types 304L and 316L stainless steel.

Stress corrosion cracking (SCC) behavior was also investigated in several different chloride environments, and compared to other alloys.

The relevance of the above corrosion data will be related to the probable performance of the new duplex stainless steel in corrosive environments present in downhole environments as well as in the chemical process industries.

KEYWORDS: Lean Duplex, Stainless Steel, UNS S82011, S32003, Corrosion, Mechanical Properties, Stress Corrosion Cracking

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51316-7325-Investigation of the Stress Corrosion Cracking Behavior of Duplex and Lean Duplex Stainless Steel Parent and Weldment Materials in Sour Service

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ISBN: 7325 2016 CP
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Lean duplex stainless steel (LDSS) can provide mechanical properties similar to that of duplex stainless steel (DSS) and is less expensive. The focus of this work was to assess the stress corrosion cracking (SCC) and SCC susceptibility of DSS and LDSS in chloride-containing sour water conditions.

 
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