| Application Type | Bond |
|---|---|
| 1 Part or 2 Part | 2 Part |
| Material Form | Liquid |
| Substrate | Aluminum, Glass, Many Metal, Some Plastic, Rubbers, Cold rolled Steel, Woods, Stainless Steel, Stainless Steel, 2024 T3 clad aluminum , Steel |
| Manufacturer | 3M |
| Chemistry | Epoxy |
| Cure Method | Base/Accelerator |
| Cure Temperature (°C) | 20 to 25, 24, 66, 93 |
| Cure Time (min) | 10,080, 120, 30 |
| Color | Green |
| Chemical Resistance | Hydraulic Oil, Tap Water, White Gas |
| High Temperature Resistance (°C) | 82 |
| Low Temperature Resistance (°C) | -55 |
| Key Specifications | Mil-Spec (United States Military Standard): MIL-A-23941A; Mil-0-5606 |
For high strength structural bonds, paint, oxide films, oils, dust, mold release agents and all other surface contaminants must be completely removed. The amount of surface preparation directly depends on the user’s required bond strength and environmental aging resistance. For suggested surface preparations on common substrates, see the section on Surface Preparation
Application to the substrates should be made within 1 hour for 3M™ Scotch-Weld™ Epoxy Adhesives 1838 B/A Green and Tan and 90 minutes for Scotch-Weld 1838-L B/A adhesive. Larger quantities and/or higher temperatures will reduce this working time.
For maximum bond strength apply product evenly to both surfaces to be joined.
Join the adhesive coated surfaces and allow to cure until completely firm. Overnight curing @75°F (24°C) is usually sufficient. Heat, up to 200°F (100°C),will speed curing.
Keep parts from moving during cure. Contact pressure is necessary. Maximum shear strength is obtained with a 3-5 mil bond line.
This products consist of two parts. Mix thoroughly by weight or volume in proportions specified on product label or in Typical Uncured Physical Properties section below. Resulting color should be uniform. Properly reseal containers.
Solvent wipe with acetone or MEK.*
*Note: When using solvents or chemicals, be sure to extinguish all ignition sources and follow the manufacturer’s precautions and directions for use when handling such materials.
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| Fixture or Handling Strength Time | Fixture-Handling Strength Time Temperature |
|---|---|
| 360 to 600 min | 25°C |
| 15 to 20 min | 66°C |
| Work / Pot Time | Test Method | Temperature |
|---|---|---|
| 60 min | Mixed 100 (gms) | 23°C |
| Long |
| Peel Strength | Type | Substrate | Test Temperature | Test Method |
|---|---|---|---|---|
| 2 piw | T-Peel strength | 2024 T3 clad aluminum | -55°C | T-Peel bonds were measured on 1 in. wide specimens cut from two FPL etched 8 in. x 8 in. x .032 in., 2024 T3 clad aluminum panels bonded together. The separation note of the testing jaws was 20 in./minute. Tests similar to ASTM D-1876 |
| 4 piw | T-Peel Strength | 2024 T3 clad aluminum | 24°C | T-Peel bonds were measured on 1 in. wide specimens cut from two FPL etched 8 in. x 8 in. x .032 in., 2024 T3 clad aluminum panels bonded together. The separation note of the testing jaws was 20 in./minute. Tests similar to ASTM D-1876 |
| 4 piw | T-Peel strength | 2024 T3 clad aluminum | 82°C | T-Peel bonds were measured on 1 in. wide specimens cut from two FPL etched 8 in. x 8 in. x .032 in., 2024 T3 clad aluminum panels bonded together. The separation note of the testing jaws was 20 in./minute. Tests similar to ASTM D-1876 |
| Tensile Strength | Test Method |
|---|---|
| 4,290 psi | Cured, Ultimate |
| Shear Strength | Type | Substrate | Chemical | Test Temperature | Test Humidity | Test Method |
|---|---|---|---|---|---|---|
| High | ||||||
| 1,500 psi | Overlap shear strength | 2024 T3 clad aluminum | -55°C | Overlap shear strength was measured on FPL etched 1 in. wide by 1/2 in. overlap specimens. The bonds were made from 2 panels of 4 in. x 7 in. x .063 in., 2024 T3 clad aluminum bonded together and cut into 1 in. wide specimens. The separation rate of the testing jaws was .1 in./minute. Tests similar to ASTM D-1002. | ||
| 3,000 psi | Overlap shear strength | 2024 T3 clad aluminum | 24°C | Overlap shear strength was measured on FPL etched 1 in. wide by 1/2 in. overlap specimens. The bonds were made from 2 panels of 4 in. x 7 in. x .063 in., 2024 T3 clad aluminum bonded together and cut into 1 in. wide specimens. The separation rate of the testing jaws was .1 in./minute. Tests similar to ASTM D-1002. | ||
| 500 psi | Overlap shear sterngth | 2024 T3 clad aluminum | 82°C | Overlap shear strength was measured on FPL etched 1 in. wide by 1/2 in. overlap specimens. The bonds were made from 2 panels of 4 in. x 7 in. x .063 in., 2024 T3 clad aluminum bonded together and cut into 1 in. wide specimens. The separation rate of the testing jaws was .1 in./minute. Tests similar to ASTM D-1002. | ||
| 2,000 to 2,200 psi | Overlap shear strength | Cold Rolled Steel | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | ||
| 1,950 psi | Overlap shear strength | Cold Rolled Steel | Tap water | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 2,200 psi | Overlap shear strength | Cold Rolled Steel | 49°C | 100 % | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C)., RH | |
| 2,250 psi | Overlap shear strength | Cold Rolled Steel | Hydraulic Oil (Mil-0-5606) | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 1,100 psi | Overlap shear strength | Cold Rolled Steel | White Gas | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 3,400 to 3,800 psi | Overlap shear strength | Stainless Steel | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | ||
| 2,750 psi | Overlap shear strength | Stainless Steel | Tap water | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 1,250 psi | Overlap shear strength | Stainless Steel | 49°C | 100 % | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C)., RH | |
| 3,600 psi | Overlap shear strength | Stainless Steel | Hydraulic Oil (Mil-0-5606) | 49°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 3,250 psi | Overlap shear strength | Stainless Steel | White Gas | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 2,400 to 2,500 psi | Overlap shear strength | Aluminum | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | ||
| 2,250 psi | Overlap shear strength | Aluminum | Tap water | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 1,050 psi | Overlap shear strength | Aluminum | 49°C | 100 % | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C)., RH | |
| 2,900 psi | Overlap shear strength | Aluminum | Hydraulic Oil (Mil-0-5606) | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). | |
| 2,150 psi | Overlap shear strength | Aluminum | White Gas | 24°C | Overlap shear on cold rolled steel (20 gauge), 302 stainless steel (50 mils thick), and 2024 T3 clad aluminum (63 mils thick) in various environments after 365 days aging. All substrates were sandblasted prior to bonding. Data are in psi and tested at 75°F (24°C). |
| Dielectric Constant | Temperature | Test Method |
|---|---|---|
| 6.06 | 24°C | Cured, 1 KHz |
| Dissipation Factor | Temperature | Test Method |
|---|---|---|
| 0.01200 | 24°C | Cured, 1 KHz |
| Thermal Conductivity | Test Method |
|---|---|
| 0.29 W/m°K | Cured |
| Volume Resistivity | Temp (°C) | Test Method |
|---|---|---|
| 1.5e15 (ohms/cm) | 24°C | Cured |
| Elongation | Test Method |
|---|---|
| 2 to 3 % | Cured, Approx. |
| Modulus | Test Method |
|---|---|
| 344,000 psi | Cured, Elasticity |
| Shore D Hardness | Shore Hardness Test Method |
|---|---|
| 80 to 85 | Cured, Approx. |
| Coefficient of Thermal Expansion (CTE) | CTE Temperature (°C) | CTE Test Method |
|---|---|---|
| 79e-6 (in./ in/°C) | 0 to 6°C | Cured |
| Glass Transition Temp (Tg) | Glass Transition Temperature (Tg) Test Method |
|---|---|
| 55°C | Cured |
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