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SPECIMEN MARKINGS
Code: All specimens are identified by color. Hot Rolled (HR) specimens are painted black on one end and Cold Finish (CF) specimens are painted white on one end. The other ends will have the color that identifies the type of steel. Materials, other than these ferrous steels, will only have one color to identify it. The only exception to this is, 304 stainless steel which is coded Black/White.
Steel
Hot RolledBlack
Cold FinishWhite
Tensile-Impact-Torsion-Fatigue-Jominy
C1018Blue1
C1045Red2
C1095Silver/Black3
4130Brown4
4140Green5
4150Pink6
4340Gray7
8620Ivory8
C1095 CFW1Silver/White
C1095 Oil HardYellow
C1050Gold
1213Orange
LedloyPurple
A36Blue
Titanium
6AL-4VWhite
Stainless Steel
304White/Black
316Black
Brass
Free CuttingWhite
Naval HardBlue
Cast Iron
Gray 20Copper
Ductile 60White
Plastic
Acrylic-CastRed
Polyethylene Hi-DensityGreen
Nylon 101Blue
Polyvinyle ChlorideBlack
Polymers (flat tensiles)
Polycarbonate 300 seriesTan
Polystyrene (injection)Clear
PolyethyleneWhite
Copper
110Red
Aluminum
2011-T3White
2017-T351Blue
2024-T351Red
3003-H14Orange
6061-T651Green
6063-T5Brown
7075-T651Yellow
Magnesium
AZ31BBlack


 

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