PCC Energy Group

321/321H

Stainless Steel Alloys

Product Information

Composition 321/321H Pipe and Tubing
Grade321321H
UNS DesignationS32100S32109
Carbon (C) Max. 0.08 0.04–0.10
Manganese (Mn) Max. 2.00 2.00
Phosphorous (P) Max. 0.04 0.04
Sulphur (S) Max. 0.03 0.03
Silicon (Si) Max. 0.75 0.75
Chromium (Cr) 17.0–20.0 17.0–20.0
Nickel (Ni) 9.0–12.0 9.0–12.0
Molybdenum (Mo) — —
Nitrogen (N) 0.1 Max. 0.1 Max.
Iron (Fe) Bal. Bal.
Other Elements Ti=5(C) to 0.70% Ti=4(C) to 0.60%
Physical Properties of 321/321H Alloys in the Annealed Condition at -20°F to +100°F
      Tensile StrengthYield Strength            
AlloyUNS DesignationSpec.psiMPaksipsiMPaksiElongation in 2 inches (min.) %Grain Size Req.Maximum HarndessModulus of Elasticity (x106 psi)Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6)Thermal Conductivity (BTU-in/ft2-h-°F)
321 S32100 — 75,000 515 — 30,000 205 — 35 — — 29.0 9.2 —
321H S32109 — 75,000 515 — 30,000 205 — 35 7 or coarser — 29.0 9.2 —
321/321H Product Range
AlloyUNS DesignationWerkstoff NR.Specifications*
321 S32100 1.4541 A269, A/SA249, A/SA312
321H S32109 — A/SA249, A/SA312
*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.