309S Stainless Steel

309S corresponds to the Chinese grade 06Cr23Ni13, old grade: 0Cr23Ni13, and American standard S30908 (U.S. AISI, ASTM).

309s is a variant of the low-carbon 309 stainless steel, suitable for welding applications. The lower carbon content reduces the precipitation of carbides in the heat-affected zone near the weld, which can prevent intergranular corrosion (welding attack) in stainless steel in certain environments.

Features

The 309S can withstand repeated heating below 980°C, featuring high high-temperature strength and oxidation resistance, as well as anti-carburization properties.

Usage

Application: Furnace materials (used in the construction of furnace pots for high-temperature furnaces, furnace bottom plates for heating furnaces, discharge ports for drying ovens, furnace tubes for hot-air furnaces, discharge ports for rotary kilns, furnace chambers, fireboxes, furnace bodies for high-temperature furnaces, furnace components, nozzles, combustion chambers, etc.).

Widely applied in key industries such as boilers, energy (nuclear, thermal, fuel cells), industrial furnaces, incinerators, heating furnaces, chemicals, and petrochemicals.

Chemical Composition

C≤0.08

Mn≤2.00

Si≤1.00

P≤0.045

S≤0.030

Ni≤12.0-15.0

Cr≤22.0-24.0

Mechanical properties

Yield Strength/MPa: ≥ 205

Tensile Strength/MPa: ≥515

Tensile elongation / %: ≥ 40

Section shrinkage rate/%: ≥50