Type 316Ti(UNS 31635) is a Titanium stabilized austenitic chromium-nickel stainless steel containing molybdenum. This addition increases corrosion resistance, improves resistance to pitting chloride ion solutions and provide increased strength at elevated temperatures. Properties are similar to those of type 316 except that 316Ti due to its Titanium addition can be used at elevated sensitisation temperatures. Corrosion resistance is improved, particularly against sulfuric, hydrochloric, acetic, formic and tartaric acids, acid sulfates and alkaline chlorides.

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
Iron: Balance

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)