Structural Adhesive Film

AF 31

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1. 3M™ Scotch-Weld™ Structural Adhesive Film AF 31/3M™ Scotch-Weld™ Structural Adhesive

Primer EC-2174 Overlap Shear on Stainless Steel

The following product performance data has been obtained in the 3M Laboratory under the conditions

specified. All data reported in this section except as noted, were developed under a cure cycle using 100 psi

bonding pressure applied by a platen press. A 10°F/minute bond line temperature rise from 80°F to 350°F

(27°C to 177°C) with 120 minutes ± 1 minute at 350°F (177°C) ± 2°F was used. The panels were then

removed from the press and post cured for 20 hours at 500°F (260°C). The primer was air dried 30 minutes

plus force dried 30 minutes at 200°F-250°F (93°C-121°C). All properties were measured on pre-slotted, .050"

thick, 17-7PH-TH 1050 stainless steel panels. The properties were measured on 1" wide by 1/2" overlap

specimens. Tests were conducted according to MMM-A-132 Types III & IV methods.

Product Performance

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

or typical only and should not be used for specification purposes.

Test Condition

Scotch-Weld AF 31/

Scotch-Weld EC-2174

A. Tensile Shear

1. Standard Temperature 75°F ± 5°F (24°C ± 2°C)

6166 psi

2. 10 minutes at 300°F ± 5°F (149°C ± 2°C)

2828 psi

3. 192 hours at 300°F ± 5°F (149°C ± 2°C)

3166 psi

4. 10 minutes at 500°F ± 5°F (260°C ± 2°C)

1983 psi

5. 192 hours at 500°F ± 5°F (260°C ± 2°C)

2268 psi

6. 10 minutes at -67°F ± 5°F (-55°C ± 2°C)

6012 psi

7. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 30 days Salt Spray

5693 psi

Exposure at 95°F (35°C)

8. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 30 days at 120°F (49°C)

5635 psi

and 90-100% relative humidity

9. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 30 days Tap Water

5764 psi

Immersion at 75°F (24°C)

10. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 7 days Immersion in

5912 psi

Anti-icing Fluid (MIL-F-5566) at 75°F (24°C)

11. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 7 days Immersion in

5867 psi

Hydraulic Oil (MIL-H-5606) at 75°F (24°C)

12. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 7 days Immersion in

5722 psi

JP4 Fuel (MIL-J-5624) at 75°F (24°C)

13. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 7 days Immersion in

6042 psi

in Hydrocarbon Fluid (MIL-S-3136) at 75°F (24°C)

B. Creep Rupture

14. Standard Temperature 75°F ± 5°F (24°C ± 2°C) after 192 hours at 1600 psi

0.0000 inches

15. 300°F ± 5°F (149°C ± 2°C) after 192 hours at 800 psi

0.0000 inches

16. 500°F ± 5°F (260°C ± 2°C) after 192 hours at 800 psi

0.0017 inches

C. Fatigue Strength

No failures