309 Spiral Wound Gaskets
Item No.:ZD-G1202/309
Description:Alloy 309 is typically used for elevated temperature applications. Their high chromium and nickel contents provide comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic alloy 304.
Applications:
Higher alloyed stainless steels
generally exhibit excellent
elevated temperature strength
along with resistance to creep
deformation and environmental
attack. As such, they are used
widely in the heat treatment
industry for furnace parts,
fans, tube hangers, and baskets
and trays to hold small parts.
These grades are also used in
the chemical process industry to
contain hot concentrated acids,
ammonia, and sulfur dioxide. In
the food processing industry,
they are used in contact with
hot acetic and citric acid.
Chemical Composition:
|
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Fe |
|
0.20 |
2.00 |
0.045 |
0.030 |
0.75 |
22 ~ 24 |
12 ~ 15 |
Balance |
Physical
Properties:
Density: 8.03 g/cm3
Aqueous Corrosion
Resistance:
Alloy 309 is primarily used at
elevated temperature to take
advantage of their oxidation
resistance. However, 309 is
resistant to aqueous corrosion
due to their high chromium and
nickel contents.
Very resistant to oxidation.
