A sulphide stress cracking (SSC) test program has been undertaken on a range of candidate forged bar stock alloys, which included super martensitic alloyed 13Cr and precipitation hardened alloys 450 and 17-4PH.

The program comprised sustained load stress corrosion tests, generally in accordance with NACE TM0177-96 Method A. The main exception was that a range of test conditions were used. This included test solutions with two different chloride contents and pH levels ranging from 3.5 to 5.5, plus hydrogen sulphide contents in the conditioning gas ranging from 0.5 to 10kPa.

The results of this test program are presented as sulfide stress cracking domain diagrams for each alloy type tested.

Subject
Materials, Precipitation (solids), Stainless alloys, Materials performance, Sodium chloride, Partial pressures, Acidity, Sodium chloride solution, Stainless steel, Sulfide stress cracking, Alloys, Chlorides, Martensitic steel
Keywords:
13Cr Super Martensitic Stainless Steel, Precipitation Hardened Stainless Steel, SSC, Forged Bar, Alloy 450, Alloy 17-4 PH, Super 13Cr
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2005
Association for Materials Protection and Performance (AMPP)
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