STRIP - Alloy 309/309S Stainless Steel
UNS S30900/S30908
W.Nr 1.4338
DESCRIPTION
Alloy 309 (UNS S30900) is a highly alloyed austenitic stainless steel designed for high-temperature corrosion resistance, offering excellent oxidation resistance up to 1900°F (1038°C) under non-cyclic conditions and 1850°F (1010°C) with frequent thermal cycling. It has good high-temperature strength and moderate creep resistance.
Alloy 309S (UNS S30908) is a low carbon version for improved weldability and resistance to sensitization during shutdown; ideal for applications exposed to high-temperature gases or condensates.
Applicable Specifications
Strip and Foil:
ASTM A240, A480, A666, ASME SA240, SA480, SA666, EN 10088-2, EN 10088-7
Applications
Heat exchangers, furnace parts, gaskets, heat shielding, exhaust systems and more.
Nominal Composition
C: 0.20 (0.08) max
Mn: 2.00 max
Si: 0.75 max
P: 0.045 max
S: 0.030 max
Cr: 22.0 – 24.0
Ni: 12.0 – 15.0
Physical Properties
Density:
0.285 lb/in3, (7.89 g/cm3)
Modulus of Elasticity (x 106 psi):
At 68°F (20°C): 29.0 x 103 ksi (200 GPa)
Coefficient of Expansion:
8.7 x 10−6 µin/in°F (32-212°F)
15.9 µm/mK (0-100°C)
Electrical Resistivity:
28.4 µ ohm.in
469 ohm-cir-mil/ft
Thermal Conductivity:
108 BTU-in/ft2hr-°F, (212°F)
15.6 W/mK (100°C)
Typical Mechanical Properties – Typical Room Temperature Mechanical Properties
Typical mechanical properties are based on ASTM A240
Annealed
- Tensile Strength (UTS): 75 ksi
- 0.2% YS: 30 ksi
- Elongation% in 2” (50.8 mm): 40
- Hardness Rockwell: 95 HRB
* Tempered Properties available upon request *
For further information Contact:
CONTACT US
Phone: 1.888.843.2350
Elgiloy Specialty Metals – Strip Products
1565 Fleetwood Dr
Elgin, IL 60123 USA
Limitation of Liability and Disclaimer of Warranty:
- The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only. It is not intended for engineering or design.
- Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, does not recommend or endorse any material for any particular end use or application.
- The data included in this data sheet are typical values and may vary.
- Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.
In no event will Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, be liable for any damages whatsoever arising from the use of the information included in the data sheets.
