Material Table

Material1) for rubbing surfaces Seal face2)/seat

Material for flexible elements3)

Materials for other components, such as springs, metal bellows4)
(excluding covers and shaft sleeves)

Manufactured carbons
A - Carbon, metal-impregnated
B - Carbon, resin-impregnated
C - Other carbons

D - Carbon steel
E - Cr steel
F - CrNi steel
G - CrNiMo steel
H - Metals with carbide coatings
K - Hard-coating, metallic
M - High-nickel alloy
N - Bronze
P - Grey cast iron
K - Alloyed grey cast iron
S - Cr cast steel
T - Other metals

U1 - Tungsten carbides, Co-bonded
U2 - Tungsten carbides, Ni-bonded
U3 - Tungsten carbides, CrNiMo-bonded
Q1 - SiC
Q2 - SiC-Si
Q3 - SiC-C-Si, composite
Q4 - C-SiC, surface-siliconised
J - Other carbides

Metal oxides
V - Aluminium oxide
W - Chromium oxide
X - Other metal oxides

Y1 - PTFE, glass-fibre reinforced
Y2 - PTFE, carbon reinforced
Z - Other plastics
Elastomers, not sheathed
B - Butyl rubber (IIR)
E - Ethylene propylene rubber (EPPM)
K - Perfluoro rubber
N - Chloroprene rubber (CR)
P - Nitrile rubber (NBR)
S - Silicon rubber (MVQ)
V - Fluoro rubber (FPM)
X - Other elastomers

Elastomers, sheathed
M - Elastomers/PTFE sheathed

G - Graphite
Y - Other non-elastomers

Various materials
U - various materials for flexible elements
D - Carbon steel
E - Cr steel
F - CrNi steel
G - CrNiMo steel
M - High-nickel alloy
N - Copper-tin alloy (Bronze)
T - Other materials

1) For more detailed data refer to mechanical seals manufacturer's literature
2) Seal face = spring loaded axially sliding ring of the mechanical seal
3) Flexible elements are seals which seat the rotating components on the shaft/shaft sleeve and the stationary components in the seal housing/end cover, including a bellows when applicable
4) For bellows seals any component missing should be designated with a dash "-"

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