Inconel 718 Belleville Washers
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Inconel 718 Belleville Washers

Belleville washers are unique, conical shaped washers recommended for use in problematic or critical bolting applications. Their conical shape affords a high spring rate over a short deflection to retain the proper bolting stress in a variety of conditions. The loss of a sound bolted connection can lead to fugitive emissions, cause equipment failure, or catastrophic events. Belleville washers can eliminate bolted joint failures due to a variety of causes:

  • High-temperature bolt yield
  • Differential thermal expansion
  • Packing or gasket relaxation or creep
  • Vibration
  • Thermal cycling
  • High cycle applications

Inconel 718 is a versatile, high strength nickel base super alloy suitable for applications from cryogenic temperatures up to and beyond 1000 degrees F. It possesses extremely high yield strength, tensile strength, and creep-rupture properties. Inconel 718 is typically chosen for Bellevilles that must perform in challenging operating conditions.

Mechanical PropertiesInconel 718

Material Tensile
Strength,
Ultimate (1)
Tensile
Strength,
Yield (2)
Elongation
at Break (3)
Inconel 718
Imperial 199000 psi 160000 psi 25%
Metric 1375 MPa 1100 MPa 25%
  1. 1. Precipitation hardened. Value at room temperature. Value at 650°C is 1100 MPa.
  2. 2. Precipitation hardened. Value at room temperature; 0.2% offset. Value at 650°C is 980 MPa.
  3. 3. Precipitation hardened. Value at room temperature. Value at 650°C is 18%.

Chemical PropertiesInconel 718

Material Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Molybdenum
0.08 max 0.35 max 0.015 max 0.015 max 0.35 max 17-21 50-55 2.80 - 3.30
Columbium Titanium Aluminum Cobalt Boron Copper Tantalum Iron
Inconel 718 4.75 - 5.50 0.65 - 1.15 0.20 - 0.80 1.00 max 0.006 max 0.30 max 0.05 max Balance

Dimensional SpecificationsInconel 718 Belleville Washer

Inconel 718 Belleville Washer dimensions
STS Part Number Diameter Belleville
Type
Raw Material ID OD T H h Load
Rating
Load
Rating
lbs or N
Thickness Height Deflection
WBEL006L21718 #6 Light Inconel 718 0.1420 0.2810 0.0200 0.0320 0.0050 150 lbs
WBEL008L26718 #8 Light Inconel 718 0.1680 0.3440 0.0250 0.0450 0.0060 250 lbs
WBEL010L31718 #10 Light Inconel 718 0.1960 0.4060 0.0300 0.0480 0.0070 325 lbs
WBEL025L42718 1/4 Light Inconel 718 0.2580 0.5630 0.0400 0.0640 0.0110 615 lbs
WBEL031L52718 5/16 Light Inconel 718 0.3220 0.6880 0.0500 0.0630 0.0130 1000 lbs
WBEL037F80718 3/8 Flange Inconel 718 0.3860 0.7140 0.0800 0.0880 0.0080 2900 lbs
WBEL050L80718 1/2 Light Inconel 718 0.5150 1.0630 0.0770 0.0930 0.0160 2300 lbs
WBEL050F125718 1/2 Flange Inconel 718 0.5150 0.9000 0.1250 0.1330 0.0080 6500 lbs
WBEL062M125718 5/8 Medium Inconel 718 0.6440 1.5000 0.1250 0.1510 0.0260 6000 lbs
WBEL062EH150718 5/8 Extra Heavy Inconel 718 0.6440 2.0000 0.1550 0.1990 0.0430 8700 lbs
WBEL075L112718 3/4 Light Inconel 718 0.7730 1.5000 0.1250 0.1470 0.0220 6200 lbs
WBEL075F125718 3/4 Flange Inconel 718 0.7730 1.3700 0.1250 0.1420 0.0170 6300 lbs
WBEL075H150718 3/4 Heavy Inconel 718 0.7730 2.0000 0.1550 0.1980 0.0420 9700 lbs
WBEL112F200718 1 1/8 Flange Inconel 718 1.1550 2.0250 0.1930 0.2260 0.0240 15400 lbs
WBELM05-L-.80-718 M5 Light Inconel 718 5.2070 mm 10.3124 mm 0.7620 mm 1.0668 mm 0.1524 mm 1668 N
Inconel 718 Belleville Washers
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Diameter Belleville Type Outside Diameter Thickness Height Load Rating Item # Availability Price Quantity UOM
#6 Light 0.2810 0.02 0.0320 150 WBEL006L21718 5-7 Working Days $1.206/EA EA
#8 Light 0.3440 0.0250 0.0450 250 WBEL008L26718 5-7 Working Days $1.548/EA EA
#10 Light 0.4060 0.03 0.0480 325 WBEL010L31718 5-7 Working Days $0.792/EA EA
1/4 Light 0.5630 0.04 0.0640 615 WBEL025L42718 5-7 Working Days $1.602/EA EA
5/16 Light 0.6880 0.05 0.0630 1000 WBEL031L52718 5-7 Working Days $1.458/EA EA
3/8 Flange 0.7140 0.08 0.0880 2900 WBEL037F80718 5-7 Working Days $2.844/EA EA
1/2 Light 1.0630 0.0770 0.0930 2300 WBEL050L80718 5-7 Working Days $3.168/EA EA
1/2 Flange 0.9 0.1250 0.1330 6500 WBEL050F125718 5-7 Working Days $5.22/EA EA
5/8 Medium 1.5 0.1250 0.1510 6000 WBEL062M125718 5-7 Working Days $10.908/EA EA
5/8 Extra Heavy 2.0 0.1550 0.1990 8700 WBEL062EH150718 5-7 Working Days $28.134/EA EA
3/4 Light 1.5 0.1250 0.1470 6200 WBEL075L112718 5-7 Working Days $11.7/EA EA
3/4 Flange 1.37 0.1250 0.1420 6300 WBEL075F125718 5-7 Working Days $8.352/EA EA
3/4 Heavy 2.0 0.1550 0.1980 9700 WBEL075H150718 5-7 Working Days $27.648/EA EA
1 1/8 Flange 2.0250 0.1930 0.2260 15400 WBEL112F200718 5-7 Working Days $54.648/EA EA
M5 Light 10.3124 mm 0.7620 mm 1.0668 mm 1668 N WBELM05-L-.80-718 5-7 Working Days $0.828/EA EA