UNS: S31603
EN-DIN: 1.4404
Industries supplied include: exhaust manifolds, furnace parts, heat exchangers, jet engine parts, pharmaceutical and photographic equipment, valve and pump trim, chemical equipment, digesters, tanks, evaporators, pulp, paper and textile processing equipment, parts exposed to marine atmospheres and tubing. 316 is an austenitic chromium nickel stainless steel containing molybdenum. This addition increases general corrosion resistance, improves resistance to pitting from chloride ion solutions, and provides increased strength at elevated temperatures. Properties are similar to those of Type 304 except that this alloy is somewhat stronger at elevated temperatures. Corrosion resistance is improved, particularly against sulfuric, hydrochloric, acetic, formic and tartaric acids; acid sulfates and alkaline chlorides. Type 316L is an extra-low carbon version of Type 316 that minimizes harmful carbide precipitation due to welding.
Nominal Composition
C: | 0.030 max |
Mn: | 2.0 max |
P: | 0.045 max |
S: | 0.030 max |
Si: | 0.75 max |
Cr: | 16.0 – 18.0 |
Ni: | 10.0 – 14.0 |
Mo: | 2.00 – 3.00 |
N: | 0.10 max |
Fe: | BAL |
Physical Properties
At 70°F (At 20°C)
Density
0.29 lb./in3 / (7.99 g/cm3)
Modulus of Elasticity (E)
28.0 x 103 ksi in tension / (193 x 103MPa in tension)
Coefficient of Expansion
8.9 x 10-6 microinches/in.-°F (32-212°F) / (16.0 μm/m-°C) (0-100°C)
Electrical Resistivity
29.4 μ ohm.in / (74 μ ohm.cm)
Thermal Conductivity
9.4 Btu-in./ft.2hr.-°F (100°C) / 16.2 W/m-K (100°C)
Applicable Specifications
AMS 5507, ASTM A240, ASTM A 666
Typical Mechanical Properties – Typical Room Temperature Mechanical Properties
Typical mechanical properties are based on AK source, ASTM A240
Condition
Annealed (Min)
Tensile Strength Min (UTS)
81 ksi (558 MPa)
0.2% YS
42 ksi (290 MPa)
Elongation% in 2” Min (50.8 mm)
50%
Hardness Rockwell
79 HRBW (Max)
*Tempered Properties available upon request*
