Table
of Materials
Material Designations
according to DIN EN 12756
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Places 1 and 2 |
Place 3 |
Places 4 and 5 |
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DIN EN 12756 |
rotary
and stationary |
DIN EN 12756 |
secondary
seals |
DIN EN 12756 |
springs
and other components |
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Synthetic carbon |
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Elastomers, non-encapsulated |
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Metals |
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A |
Hard carbon, antimony impregnated |
E |
EP rubber (EPDM) |
D |
C steel 1.7335 |
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B1 |
Hard carbon, synthetic resin impregnated |
K |
Perfluor-rubber
(Kalrez) |
E1 |
Cr steel 1.4122 |
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B2 |
Hard carbon, graphitized P658RC |
K0 |
Kalrez 4079 |
E2 |
Cr steel 1.4057 |
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B4 |
Hard carbon, graphitized P65NR2 |
K1 |
Chemraz 505 |
E3 |
Cr steel 1.4034 |
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B9 |
Hard carbon, |
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Parker
V 3819-75 |
E4 |
AM
350
(AISI 633) |
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C |
Hard carbon, glass impregnated |
K3 |
Kalrez
1050 |
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K4 |
Kalrez
D 2035 |
F1 |
CrNi steel 1.4541 (321) |
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Metal |
N |
Chloroprene / Neoprene (CR) |
F2 |
CrNi steel 1.4310 |
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K |
CrNiMo steel, stellite |
P |
Nitrile rubber (NBR) |
F3 |
CrNi steel 1.4301 (304) |
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S |
Cast chromium molybdenum |
S |
Silicone rubber (MVQ) |
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V |
Fluorine rubber, Viton (FPM) |
G1 G2 |
CrNiMo steel 1.4571 (316 Ti) CrNiMo steel 1.4361 |
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Metal carbides |
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Elastomers, encapsulated |
G3 G4 |
CrNiMo steel 1.4582 CrNiMo steel 1.4462 (318LN) |
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Q1 Q2 |
Silicon carbide, SSIC Silicon carbide, Si-SiC |
M1 M2 |
Viton® fluoroelastomers *), PTFE encapsulated Viton® fluoroelastomers *), FEP encapsulated |
G5 G6 |
CrNiMo steel 1.4539 (904L) CrNiMo steel 1.4435 (316L) |
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U1 U2 |
Tungsten
carbide, cobalt-bonded Tungsten
carbide, nickel-bonded |
M3 |
Silicone rubber, FEP encapsulated |
G7 |
CrNiMo steel 1.4439 (317L) |
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High-degree nickel alloys |
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Metal oxides |
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Non - elastomers |
M1 |
Hastelloy B2 2.4617 |
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V W |
Al-Oxide 99.7 % Cr-Oxide |
G T1 |
Pure graphite (CHETRATERM̉) PTFE |
M2 M3 |
Hastelloy C4 2.4610 Monel K500 2.4375 |
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T2 |
PTFE with backup spring |
M4 |
Nilo Alloy 42 1.3917 |
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D |
C steel nickel-plated |
T3 |
PTFE
/ Ekonol |
M5 |
Carpenter 20 2.4660 |
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N |
Bearing metal / centering |
T4 |
PTFE / Ekonol and backup spring |
M6 |
Inconel 718 |
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T5 |
PTFE/Fiberglas |
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T6 |
PTFE / Carbon-graphite |
N1 |
Bronze (free of zinc) |
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T7 |
PTFE/Bronze |
N2 |
Caro-Bronze (half hardness) |
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T8 Y (F) |
PTFE/25 % carbon content gasket (non-asbestos) |
T1 T2 |
Titanium, pure 3.7035 Tantal |
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*) Viton® is a registered trademark of DuPont Performance Elastomers.