Stress corrosion cracking can occur across a wide range of temperatures depending on the metal type and chemical exposure. SCC happens when tensile stress, a corrosive environment, and temperature conditions align to weaken the material.
Typical SCC temperature ranges by material:
- Stainless steel (in chlorides): Most susceptible between 50°C and 150°C (122°F–302°F), especially in marine or humid industrial environments.
- Carbon steel (in caustics): SCC often starts above 60°C (140°F), particularly in strong alkaline conditions.
- Brass (in ammonia): Cracking can occur at room temperature, commonly known as season cracking.
- High-strength alloys: Certain aluminum or titanium alloys may crack across a broader range depending on the environment and load.
Because SCC is highly material- and environment-specific, it’s critical to understand both operating conditions and metal selection when designing against failure.