3M 1838L B/A

3M 1838L B/A Datasheet
  • Description for 3M 1838L B/A

    Long worklife rigid epoxy • Low viscosity version of 1838

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 2 Part
    Material Form Liquid
    Substrate Aluminum, Epoxy, Glass, Many Metals, Some Plastics, Rubbers, Cold rolled Steel, Woods, 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
    Viscosity (cPs) 10,000, Low, Flowable
    Color Translucent, Clear, Amber
    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-0-5606
  • Technical Data for 3M 1838L B/A

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
      • Part A Name - Base
      • Part B Name - Accelerator
    • Material Form
      • Liquid
    • Substrate
    • Chemistry
    • Cure Method
      • 2-Part Cure - Base/Accelerator
    • Color
      • Translucent
      • Clear / Transparent - Clear
      • Red - Amber
    • Key Specifications
      • Mil-Spec (United States Military Standard): 0-5606 - Mil-0-5606
    Specifications
    Cure Specs
    Cure Temperature (°C) 20 to 25, 24, 66, 93
    Cure Time (min) 10,080, 120, 30
    Viscosity (cPs) 10,000, Low, Flowable Test Method
    Fixture or Handling Strength Time (min) 360 to 600, 15 to 20 Test Method
    Work / Pot Time (min) 60, Long Test Method
    Mix Ratio 1:1 (by volume), 6:5 (by weight)
    Bond Strength
    Structural/Load-Bearing Structural
    General Bond Strength (psi) Excellent
    Peel Strength (piw) 5, 4, 4 Test Method
    Shear Strength (psi) High, 2,000, 2,500, 300, 2,000 to 2,200, 1,950, 2,200, 2,250, 1,100, 3,400 to 3,800, 2,750, 1,250, 3,600, 3,250, 2,400 to 2,500, 2,250, 1,050, 2,900, 2,150 Test Method
    Material Resistance
    Chemical Resistance Hydraulic Oil, Tap Water, White Gas
    Environmental Resistance Excellent
    High Temperature Resistance (°C) 82
    Low Temperature Resistance (°C) -55
    Moisture/Humidity Resistance Moisture/humidity resistance
    Conductivity
    Dissipation Factor 0.08800 Test Method
    Dielectric Strength (V/mil) 600 Test Method
    Dielectric Constant 6.10 Test Method
    Thermal Conductivity (W/m°K) 0.20 Test Method
    Volume Resistivity (O) 5.0e12 (ohms/cm) Test Method
    Hardness
    Shore D Hardness 80 to 85 Test Method
    Elongation (%) 3 to 7 Test Method
    Flexibility Rigid
    Other Properties
    Glass Transition Temp (Tg) (°C) 32 Test Method
    Coefficient of Thermal Expansion (CTE) 301e-6 (in./ in/°C) Test Method
    Business Information
    Shelf Life Details Store products at 80°F (27°C) or below for maximum shelf life. Higher temperatures reduce normal shelf life.;These products have a shelf life of 2 years from date of shipment when properly stored in their unopened containers. Lower temperatures can cause increased viscosity of a temporary nature. Rotate stock on a “first in-first out” basis.
    Shelf Life Temperature (°F) 80
    Shelf Life Type from date of shipment
    Shelf Life (mon) 24
  • Best Practices for 3M 1838L B/A

    *See Terms of Use Below

    1. Surface Preparation

      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.

    2. Application

      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.

      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.

    3. Mixing

      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.

    4. Clean-Up

      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.

  • Comparable Materials for 3M 1838L B/A

    *See Terms of Use Below

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Fixture or Handling Strength Time Test Methods
Fixture or Handling Strength Time Fixture-Handling Strength Time Temperature
360 to 600 min 25°C
15 to 20 min 66°C
Viscosity Test Methods
Viscosity Temperature
10,000 cPs 27°C
Low
Flowable
Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
60 min Uncured, Mixed 100 (gms) 23°C
Long
Shear Strength Test Methods
Shear Strength Type Substrate Chemical Test Temperature Test Humidity Test Method
High
2,000 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.
2,500 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.
300 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 24°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).
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).
3,600 psi Overlap shear strength Stainless 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).
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).
2,900 psi Overlap shear strength Aluminum Hydraulic Oil 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).
Peel Strength Test Methods
Peel Strength Type Substrate Test Temperature Test Method
5 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
Dielectric Constant Test Methods
Dielectric Constant Temperature Test Method
6.10 24°C Cured, 1 KHz
Dielectric Strength Test Methods
Dielectric Strength Test Method
600 V/mil Cured
Dissipation Factor Test Methods
Dissipation Factor Temperature Test Method
0.08800 75°C Cured, 1 KHz
Thermal Conductivity Test Methods
Thermal Conductivity Test Method
0.20 W/m°K Cured
Volume Resistivity Test Methods
Volume Resistivity Temp (°C)
5.0e12 (ohms/cm) 24°C
Elongation Test Methods
Elongation Test Method
3 to 7 % Cured, Approx.
Shore D Hardness Test Methods
Shore D Hardness Shore Hardness Test Method
80 to 85 Cured, Approx.
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C) CTE Test Method
301e-6 (in./ in/°C) 20 to 84°C Cured
Glass Transition Temp (Tg) Test Methods
Glass Transition Temp (Tg) Glass Transition Temperature (Tg) Test Method
32°C Cured
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