Temper Colors

Plain Carbon Steel Only

English Color Text Fahrenheit  Color  Celsius
Pale yellow 2 420°   216°
Pale yellow 2 420°   216°
Very pale yellow 1 430°   221°
Light yellow 1, 2, Straw 3 440°   227°
Pale straw-yellow 1, Straw 3 450°   232°
Straw-yellow 1, 2 460°   238°
Deep straw-yellow 1, 3 470°   243°
Dark yellow 1, Light orange 3 480°   249°
Yellow-brown 1, Orange 3 490°   254°
Brown-yellow 1, 3, Bronze 2 500°   260°
Spotted red-brown 1, Dark Brown 2 510°   266°
Brown with purple spots 1, 2 520°   271°
Light purple 1, 2, Purple 3 530°   277°
Full purple 1, Purple 2 540°   282°
Dark purple 1 550°   288°
Full blue 1, 3 560°   293°
Dark blue 1, Blue 2 570°   299°
Dark blue 2 590°   310°
Pale blue 3  
Light blue 2 610°   321°
BLACK OXIDE 0-900°   °
Light blue 1 640°   338°
Steel grey 2 650°   343°
English Colour Text Fahrenheit  Colour  Celsius
Converted temperatures rounded to nearest degree.

Colors represented here are approximations and at best require a millions of color computer monitor adjusted correctly to view them. The colors as represented do not show the metallic luminosity of the bright steel surface on which the colors are transparently overlaid. For true colors a sample should be made of polished steel. Printed the colors above may or may not print as they are HTML "background".


1 Machinery's Handbook, 18th Edition, 1970, Industrial Press (Color text the same from 5th to 20th Editions with exception of the addition of Light blue at 640°F)

2 Edge of the Anvil, Jack Andrews, 1977, Skipjack Press.

3 Metals for Engineering Craftsman, C.O.S.I.R.A., London England. Temperatures given at tens and fives in Celsius. Example: Purple = 275°C / 545°F

4 See NEW chart with steel temper hardnesses

Revised June 26, 2003 - replaced at 28,697 September 2006.


Copyright © 2002 Jock Dempsey, www.anvilfire.com

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