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Components for chemical plant engineering, specifically fittings, metering systems, process engineering

COMPONENTS FOR CHEMICAL PLANT ENGINEERING, SPECIFICALLY FITTINGS, METERING SYSTEMS, PROCESS ENGINEERING

Chemical plant engineering requires a variety of specialized product solutions. Our EKasic® silicon carbide and EKasin® silicon nitride products are used for, e.g., for fittings and dosing systems, or in process engineering. They also have a proven track record as components for valve manufacture. They are produced exclusively to customers’ specifications, and an extremely wide variety of shapes and geometries are available.

Product Solutions and Applications

To reduce wear in parts subject to abrasion and corrosion, even at high temperatures, we have developed non-oxide ceramics with special properties. We also produce other product solutions tailored to particular industrial conditions (e.g. temperature, medium, solids content, flow rate, viscosity), such as the following chemical plant components:

  • Fitting components
  • Valve components, valve parts, valve cylinders, valve seats
  • Balls with/without a through bore, ball joints, ball-bearing seats
  • Disk valves, flow valves
  • Actuator parts
  • Wear protection tubes

Materials Used

For such components, our industrially proven materials EKasic® silicon carbide and EKasin® silicon nitride offer custom solutions:

  • EKasin® silicon nitride
    the high-toughness solution
  • EKasic® T silicon carbide
    the solution for good toughness and high hardness
  • EKasic® F silicon carbide
    the very hard standard material with very good corrosion resistance

  • EKasic® F plus silicone carbide
    the solution with high strength with low porosity and excellent corrosion resistance
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Silicon Carbide
Material properties Norm Symbol/Unit EKasic®
F		 EKasic®
F plus		 EKasic®
C
Density DIN EN 623-2 ρ [g/cm3] >3.10 >3.16 >3.10
Porosity DIN EN 623-2 P [%] <3.0 <1.0 <3.0
Mean grain size [μm] <5 <5 bimodal
Grain size distribution [μm] 10-1500
Phase composition α-SiC α-SiC α-SiC
Vickers hardness DIN EN 843-4 HV 1 [GPa] 24.5 24.5 24.5
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 24.5 24.5 24.5
Young's modulus DIN EN 843-2 E [GPa] 430 430 430
Weibull modulus DIN EN 843-5 m 10 10 10
Flexural strength,
4-pt bending		 DIN EN 843-1 σB [MPa] 400 510 400
Compressive strength σD [MPa] > 2500 > 2500 > 2500
Poisson ratio ν 0.17 0.17 0.17
Fracture toughness
(SENB)		 Klc [MPa·m0,5] 4 4 3.5
Coefficient of
thermal expansion		 DIN EN 821-1
20°C - 500°C α [10-6/K] 3.8 3.8 3.8
500°C - 1000°C α [10-6/K] 5.1 5.1 5.1
Specific heat at 20°C DIN EN 821-3 cp [J/g K] 0.69 0.69 0.69
Thermal conductivity
at 20°C		 DIN EN 821-2 λ [W/mK] 130 130 130
Thermal stress
parameters		 calculated
R1 = σB·(1-ν) / (α·E) R1 [K] 203 259 203
R2 = R1·λ R2 [W/mm] 26 34 26
Specific electrical
resistance at 20°C		 DIN EN 50359 ρ [Ω cm] > 108 > 108 104-105



Silicon Carbide
Material properties Norm Symbol/Unit EKasic®
P		 EKasic®
G		 EKasic®
T
Density DIN EN 623-2 ρ [g/cm3] >2.76-
2.89		 >3.02 >3.21
Porosity DIN EN 623-2 P [%] 10-14 <3.0 <1.0
Mean grain size [μm] <5 bimodal <2
Grain size distribution [μm] 10-1000  
Phase composition α-SiC α-SiC,
graphite		 α-SiC,
YAG
Vickers hardness DIN EN 843-4 HV 1 [GPa] 24.5 24.5 22.5
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 24.0 24.0 22.5
Young's modulus DIN EN 843-2 E [GPa] 340 390 420
Weibull modulus DIN EN 843-5 m 15 15 15
Flexural strength,
4-pt bending		 DIN EN 843-1 σB [MPa] 225 250 550
Compressive strength σD [MPa] > 2000 > 2200 > 2500
Poisson ratio ν 0.13 0.15 0.17
Fracture toughness
(SENB)		 Klc [MPa·m0,5] 3 3.5 6
Coefficient of
thermal expansion		 DIN EN 821-1
20°C - 500°C α [10-6/K] 3.8 3.8 4.1
500°C - 1000°C α [10-6/K] 5.1 5.1 5.3
Specific heat at 20°C DIN EN 821-3 cp [J/g K] 0.69 0.69 0.71
Thermal conductivity
at 20°C		 DIN EN 821-2 λ [W/mK] 110 130 80
Thermal stress
parameters		 calculated
R1 = σB·(1-ν) / (α·E) R1 [K] 152 143 265
R2 = R1·λ R2 [W/mm] 17 19 21
Specific electrical
resistance at 20°C		 DIN EN 50359 ρ [Ω cm] > 108 104-105 103-106
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Silicon Nitride
Material properties Norm Symbol/Unit EKasin®S
Density DIN EN 623-2 ρ [g/cm3] >3.24
Porosity DIN EN 623-2 P [%] <0.5
Mean grain size [μm] <2
Aspect ratio (L/D) 3-5
Phase composition β-Si3N4, Oxide
Vickers hardness DIN EN 843-4 HV 1 [GPa] 15
Knoop hardness DIN EN 843-4 HK 0.1 [GPa] 15
Young's modulus DIN EN 843-2 E [GPa] 300
Weibull modulus DIN EN 843-5 m 15
Flexural strength, 4-pt bending DIN EN 843-1 σB [MPa] 800
Compressive strength DIN 51104 σD [MPa] >2500
Poisson ratio DIN EN 843-2 ν 0.28
Fracture toughness (SENB) Klc [MPa·m0,5] 7
Coefficient of thermal expansion DIN EN 821-1
25°C - 500°C α [10-6/K] 2.5
500°C - 1000°C α [10-6/K] 3.9
Specific heat at 25°C DIN EN 821-3 cp [J/g K] 0.65
Thermal conductivity at 25°C DIN EN 821-2 λ [W/m K] 27
Thermal stress parameters calculated
R1 = σB·(1-ν) / (α·E) [K] 768
R2 = R1·λ [W/mm] 21
Specific electrical
resistance at 25°C		 DIN EN 50359 ρ [Ω cm] >1011