Important Temperature

Some Important temperature

Hardening Temperature Cooling process
Carbon Steel 780 – 850c Cool in Air
High Speed Steel1200 – 1250c Cool in Air
Dye Steel 900 – 1000c Cool in Air
Spring steel 780 – 850c Cool in Air
Tempering Process
Element Temperature Time
Carbon Steel 200 – 220c ½ hours
Dye steel 200 – 400c 1 hour
High speed steel560 – 600c 1.5 hours
Spring steel 300 – 350c 1-3 hours
Annealing Process
High carbon steel830 – 870c 4 hours
High Carbon steel810 – 850c 4 hours
Dye- steel 800 – 850c 4 hours
Spring steel 750 – 800c 4 hours
Normalizing Process
Carbon steel 830 – 880c Cool in air
Spring Steel 760 – 810c Cool in air
Carbon Manganese ( Tool Steel) 800 – 850c Cool in air
Metal Temperature by color
Faint Red 500c
Blood Red 580c
Dark Cherry 635c
Medium Cherry 690c
Cherry 745c
Bright Cherry 790c
Salmon 845c
Dark orange 890c
Orange 940c
Lemon 1000c
Light yellow 1080c


Posted by: Adnan