SS316Ti vs SS316H: Heat Resistance & Stability Analysis

SS316H (UNS S31609)

Key Feature: Higher Carbon (0.04-0.10%).

Heat Resistance: Excellent tensile/yield strength at elevated temps (>500°C).

Stability: Better for sustained loads and creep resistance due to carbon.

Applications: Pressure vessels, boilers, reactors.

SS316Ti (UNS S31635)

Key Feature: Titanium stabilization (adds Ti ~0.5%).

Heat Resistance: Prevents carbide precipitation, giving superior IGC resistance.

Stability: Excellent weldability and stability in high-heat, IGC-prone zones.

Applications: Heat exchangers, petrochemical, marine environments.

Comparison Summary:

Strength: 316H for creep/tensile strength, 316Ti for weld stability.

Corrosion: 316Ti excels at preventing IGC after welding; both resist general corrosion well.

Cost: 316Ti often costs slightly more.

When to Choose: 316H for heavy-duty, high-temp structural parts; 316Ti for welded components needing IGC resistance.