Structural Void Filling Compound 3550 B/A FST

Technical Datasheet

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Typical Product Performance (continued)

Note: The following technical information and data should be considered representative or typical only and should

not be used for specification purposes. The following mechanical and physical data is based on Scotch-Weld

3550 B/A FST Compound.

Mechanical Properties

Compressive strength - General

A block was prepared from approximately 7 oz (200 grams) of manually mixed low density void-filler, which

was carefully introduced into a mold with inner dimensions of approximately 2" x 2" x 8" (50 x 50 x 200 mm).

Filler block was cured 14 days at 73°F (23 ± 2°C). Individual specimens of the dimensions of 0.5" x 0.5" x 1.0"

(12.5 x 12.5 x 25.0 mm) were cut from a cured block of void-filler with an accuracy of + 0.008" (+ 0.2 mm) on

each dimension. Compression strength tests were performed. See data below.

All test temperatures were measured with a thermocouple on compression plate close to specimen (not in

direct contact on specimen due to the low thermal conductivity of the void-filler material) with an accuracy of

± 2°C. For all test temperatures except for ambient, a minimum soak time of 10 minutes was employed before

compression testing was initiated. All compression strength tests were performed using a crosshead displacement

rate of 0.02 inch/min (0.5 mm/min). All specimens were loaded with force applied to the 0.5” (12.5 mm) square

surface.

Properties

Test Method

Test

Cure Cycle of 15 days @

Temperature

Room Temperature

Typical Compressive Strength

ISO 604

-67°F (-55 ± 2°C)

6,200 psi (42.9 Mpa)

73°F (23 ± 2°C)

3,500 psi (24.3 Mpa)

176°F (80 ± 2°C)

780 psi (5.4 Mpa)

223°F (106 ± 2°C)

725 psi (5.28 Mpa)

Typical Compressive Modulus

ISO 604

-67°F (-55 ± 2°C)

180,000 psi (1,228 Mpa)

73°F (23 ± 2°C)

125,000 psi (862 Mpa)

176°F (80 ± 2°C)

13,100psi (91 Mpa)

223°F (106 ± 2°C)

13,800 psi (95 Mpa)

Filler Strength / Shear Strength

AITM 1-00046

73°F (23 ± 2°C)

480 lbf (2,145 N)

Aged Mechanical Properties Definitions:

Compressive strength after humidity and fluid immersion aging

Specimens were wiped with a paper cloth after removal from the hot wet chamber/fluid and loaded within

30 minutes.

Compressive modulus - Wet

See above for modulus calculation. Specimens were wiped with a paper cloth after removal from the hot wet

chamber/fluid and loaded within 30 minutes.

Compressive strength

Specimens were exposed to each of the required environments for a period of 48, 1000 and 2000 hours for the

“hot wet” conditioned at 158°F (70°C), 85% relative humidity. The specimens were then removed from the

aging environments, and wiped with a paper cloth prior to loading within the next 30 minutes.