UNS S38815 is a high silicon austenitic stainless steel resistant to concentrated sulfuric acid corrosion.
14Cr-16Ni-6Si-1Mo-1Cu Austenitic Stainless Steel
Pipe: OD 10 – 323.9mm WT: 1 – 25mm
Tube: OD 10 – 177.8mm WT: 1 – 20mm
Plate: 500-1500mm x 2438mm/3000mm/6000mm x 1 – 20mm
The alloy is usually produced by AOD/VOD/VIM, followed by Electroslag Refining (ESR)/VAR if required for special purposes. Bars and forgings need to be ultrasonically inspected according to different grades at the buyer’s request.
Bars are usually black/bright white in a softened state.
Final heat treatment: Solution Treatment/QT
ASTM A959, A276, A312, A213, A632, A176, A580
|Grade||Fe, %||Si, %||Mn, %||Cr, %||Cu, %||Ni, %||P, %||C, %||S, %||Mo, %||N, %|
|UNS S38815||56.16–65.1||5.5–6.5||< 2||13–15||0.5–1.5||15–17||< 0.04||< 0.03||< 0.02||0.75–1.5||0.15–0.25|
It has excellent corrosion resistance in high-temperature concentrated sulfuric acid and has the characteristics of resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking.
It overcomes the shortcomings of brittle silicon-rich phase and poor hot workability of high-silicon stainless steel and has good plastic deformation performance.
Black bar/flat bar/steel strip/square bar, bright peeling+polishing, centerless grinding
Forged rings, tubes, sleeves, discs, shafts
Manufacture of shell-and-tube concentrated sulfuric acid coolers and acid separators for dry suction towers