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Diehl Tool Steel has been selling quality tool steel for over 85 years

Diehl Tool Steel is an ISO 9001:2008 certified company

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Grade Color Codes

Diehl Steel Grade Color Codes

GradeColor
1018 Cold RollPink
4140 AnnealedYellow
4140 Heat TreatedOrange
4150 Heat TreatedOrange – Black
420Red – Yellow
6150Fluorescent Pink
8620Red – White – Blue
A-10Blue – Orange
A-2Blue
A-36 Hot Roll PlateBlack
A-36 XL PlateBlack
A-6Purple
A-8Blue – Black
CPM 10VBlue – Purple
CPM REX M-4Tan – Purple
D-2Green
D-7Green – Yellow
H-13Brown
H-13 PremiumBrown – Grey
L-6Red – White
M-2Tan
M-4Tan – White
M-42Tan – Black
O-1Red
O-6Red – Green
P-20Orange – Grey
P-20-32Jade – Violet
S-1White – Orange
S-5White – Yellow
S-7White
T-1Tan – Blue
T-15Tan – Yellow
VERTEXSilver
W-1Yellow – Purple
Data is typical and should not be construed as actual values for any category.
Applications and technical information require engineers and tool designers to exercise independent judgement.
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