The temperatures for quenching and tempering depend on the material used and the hardness and toughness required. Here are the temperature ranges for general situations:

1. Quenching
Temperature range: Usually between 800°C and 900°C (about 1470°F to 1650°F).
Specific temperature: For example, carbon steel is often quenched at around 850°C (1560°F), while alloy steel may be quenched at higher temperatures.

2. Tempering
Temperature range: Usually between 150°C and 700°C (about 300°F to 1300°F).
Specific temperature:
Low-temperature tempering: about 150°C to 250°C (about 300°F to 480°F), suitable for improving toughness.
Medium-temperature tempering: about 300°C to 450°C (about 570°F to 840°F), is used to balance hardness and toughness.
High-temperature tempering: about 500°C to 700°C (about 930°F to 1300°F), can be used to reduce hardness and increase plasticity.

Specific quenching and tempering temperatures should be adjusted according to the material's composition and desired properties.