Chemical Composition Element Content (wt. %) C ≤0.080 Si ≤1.00 Mn ≤2.00 P ≤0.045 S ≤0.030 Cr 22.0–24.0 Ni 12.0–15.0 Mo — N — Other Fe: Balance

Mechanical Properties Condition Tensile Strength Yield Strength (0.2%) Elongation Hardness Solution annealed ≥515 ≥205 ≥35 ≤217 HB / ≤95 HRB

Furnace components Heat-treatment equipment Combustion systems Petrochemical plants High-temperature ducts and piping Industrial heat exchangers

Chemical Composition Element Content (wt. %) C ≤0.080 Si ≤1.00 Mn ≤2.00 P ≤0.045 S ≤0.030 Cr 22.0–24.0 Ni 12.0–15.0 Mo — N — Other Fe: Balance

Mechanical Properties Condition Tensile Strength Yield Strength (0.2%) Elongation Hardness Solution annealed ≥515 ≥205 ≥35 ≤217 HB / ≤95 HRB

Furnace components Heat-treatment equipment Combustion systems Petrochemical plants High-temperature ducts and piping Industrial heat exchangers

309S Stainless Steel Round Pipe

Grade: 309S/S30908

Size:

Seamless: 6mm*1mm-720mm*50mm

Welded: 12mm*0.5mm-2000mm*100mm

Coiled: 4mm*0.3mm-32mm*3mm

Standard: ASTM A312, ASTM A213 etc.

Surface: No.1(Pickling), Bright(Polished)

309S Stainless Steel Pipe is a high-chromium, high-nickel austenitic grade developed for oxidation resistance and elevated-temperature service. Its alloy balance provides better heat resistance than conventional 304 grades while retaining useful fabrication characteristics. 309S pipe is suitable for furnace components, heat-treatment equipment, combustion systems, petrochemical units, and industrial piping exposed to elevated temperatures and oxidizing atmospheres.

Chemical Composition