ASTM A662 Grade C Normalized and/or Stress Relieved

ASTM A662 Grade C Normalized and/or Stress Relieved introduction

ASTM A662 covers the heat treatment specifications for wrought and forged austenitic stainless steels, including Grade C annealing and/or stress relieving.

ASTM A662 Grade C annealing is a heat treatment process used to homogenize austenitic stainless steels and relieve internal stresses. It is typically performed at a temperature of 1000°C to 1200°C (1832°F to 2192°F), depending on the specific grade of steel. ASTM A662 Grade C annealing can improve the ductility and workability of the steel.

Stress relieving is a heat treatment process used to relieve internal stresses. It is typically performed at a temperature lower than the annealing temperature, depending on the specific grade of steel. Stress relieving can improve the dimensional stability and corrosion resistance of the steel.

The specific steps for ASTM A662 Grade C annealing and/or stress relieving are as follows:

1. Preheat the stainless steel to a temperature of 1000°C to 1200°C (1832°F to 2192°F).
2. Soak at this temperature for a specific time, depending on the specific grade of steel and thickness.
3. Slowly cool the stainless steel to room temperature.
4. If necessary, stress relieving can be performed. The stress relieving temperature is typically 100°C to 200°C (180°F to 392°F) lower than the annealing temperature.
5. Slowly cool the stainless steel to room temperature.