What is the typical annealing temperature for cold-rolled coils?

2025-09-15 10:17:10

The annealing temperature for cold-rolled coils must be determined based on material composition, cold-rolling deformation, and performance requirements, generally ranging between 600°C and 700°C. For ordinary carbon steels (e.g., SPCC, DC01), a recrystallisation annealing temperature of approximately 650°C is typically employed. For high-strength low-alloy steels, achieving an optimal balance of strength and ductility may necessitate slightly elevated temperatures or extended holding times. Stainless steels require higher annealing temperatures, generally between 1000°C and 1100°C, to ensure complete microstructural transformation and carbide dissolution. During annealing, the heating rate, holding time, and cooling rate must be controlled to prevent excessive grain growth from overheating or incomplete work hardening from insufficient temperatures. Temperature control methods differ slightly between continuous annealing furnaces and bell annealing furnaces.