Alloys are often added to steel to increase desired properties. Marine
grade stainless steel, called type 316, is resistant to certain types of
interactions. There are a variety of different types of 316 stainless steel,
including 316 L, F, N, H, and several others. Each is slightly different, and each
is used for different purposes.
What Are the Qualities of Type 316 Steel?
Type 316 steel is an austenitic chromium-nickel stainless steel that contains between
two and three percent molybdenum.
The molybdenum content increases corrosion resistance, improves resistance to pitting in
chloride ion solutions and increases strength at high temperatures.
Type 316 grade stainless steel is particularly effective in acidic environments. This
grade of steel is effective in protecting against corrosion caused by sulfuric,
hydrochloric, acetic, formic and tartaric acids, as well as acid sulfates and alkaline
chlorides.
How Is Type 316 Steel Used?
Common uses for type 316 stainless steel include in the construction of exhaust
manifolds, furnace parts, heat exchangers, jet engine parts, pharmaceutical and
photographic equipment, valve and pump parts, chemical processing equipment, tanks,
evaporators, as well as pulp, paper and textile processing equipment and any parts
exposed to marine environments.
What Are the Qualities of Type 316L Steel?
Type 316L stainless steel is an extra-low carbon version of the 316 steel alloy. The
lower carbon content in 316L minimizes deleterious carbide precipitation as a result of
welding. Consequently, 316L is used when welding is required in order to ensure maximum
corrosion resistance.
Physical Properties of Type 316 Steels
Density: 0.799g/cm3
Electrical resistivity: 74 microhm-cm (20C)
Specific Heat: 0.50 kJ/kg-K (0-100°C)
Thermal conductivity: 16.2 W/m-k (100°C)
Modulus of Elasticity (MPa): 193 x 103 in tension
Melting Range: 2500-2550°F (1371-1399°C)
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