Approximate Temperature of Steel by Color
 

                         

   
Color of Metal Degrees C Degrees F
Very Faint Yellow 215 420
Very Pale Yellow 221 430
Light Yellow 226 440
Pale Straw Yellow 232 450
Straw Yellow 237 460
Deep Straw Yellow 243 470
Dark Yellow 249 480
Yellow Brown 254 490
Brown Yellow 260 500
Spotted Red Brown 265 510
Brown Purple 271 520
Light Purple 276 530
Full Purple 282 540
Dark Purple 288 550
Full Blue 293 560
Dark Blue 299 570
Very Dark Blue 315 600
Blue Green 332 630
Black Red 537 1000
Blood Red 649 1200
Low Cherry Red 746 1375
Medium Cherry Red 774 1425
Full Cherry Red 815 1500
Bright Red 843 1550
Salmon 899 1650
Orange 940 1725
Lemon 996 1825

   from: Steel color chart

 

 

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