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UNS S31635 stainless steel bar 316Ti corrosion resistance

316Ti（UNS S31635）is a titanium-stabilized version of molybdenum-bearing austenitic stainless steel. 316Ti stainless steel with excellent resistance to general corrosion, higher creep, stress-rupture and tensile strength at elevated temperature. 316Ti can be used for extended periods at elevated temperatures without compromising its corrosion resistance.

316Ti Chemistry Typical:
Carbon: 0.08 max
Manganese: 2.00 max
Silicon: 1.00 max
Chromium: 16.00-18.00
Nickel: 10.00-14.00
Molybdenum: 2.00-3.00
Titanium: 5 x (Carbon + Nitrogen) – 0.07
Phosphorus: 0.040 max
Sulfur: 0.030 max
Copper: 0.075 max

316Ti Physical Properties:
Density: 0.29 lbs/in³,7.99 g/cm³

Electrical Resistivity: microhm-in (microhm-cm):
68°F (20°C): 29.4 (74.0)

Specific Heat: BTU/lb/°F (kJ/kg•K):
32-212°F (0-100°C): 0.12 (0.50)

Thermal Conductivity: BTU/hr/ft²/ft/°F (W/m•K):
At 212°F (100°C): 9.4 (16.2)
At 932°F (500°C): 12.4 (21.4)

Mean Coefficient of Thermal Expansion, in/in/°F (μm/m•K):
32 – 212°F (0 -100°C): 8.9 x 10-6(16.0)
32 – 600°F (0 -315°C): 9.0 x 10-6(16.2)
32 -1000°F (0 -538°C): 9.7 x 10-6 (17.5)
32 -1200°F (0 -649°C): 10.3 x 106 (18.5)
32 -1500ºF (0 -871ºC): 11.1 x 10-6 (18.5)

Modulus of Elasticity: ksi (MPa)
28.0 x 10³(193 x 10³) in tension
11.2 x 10³(77 x 10³) in torsion

Magnetic Permeability: H = 200 Oersteds: Annealed < 1.02 max.

Melting Range: °F (°C) 2500 – 2590 (1371 – 1421)

316Ti Corrosion resistance:
The molybdenum bearing alloys such as Types316Ti stainless steels are more resistant to atmospheric and other mild types of corrosion than the 18Cr-8Ni stainless steels. In general, media that do not corrode 18-8 stainless steels will not attack the molybdenum-containing grades. One known exception is highly oxidizing acids such as nitric acid to which the molybdenum bearing stainless steels are less resistant. Types 316Ti are considerably more resistant than any of the other chromium-nickel stainless steels to solutions of sulfuric acid. Where condensation of sulfur-bearing gases occurs, these alloys are much more resistant than other types of stainless steels. In sulfuric acid solutions, the acid concentration has a strong influence on the rate of attack.

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