L-543
Woven Fiberglass Polyester Prepreg
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 Flammability
  • L-543 is inherently flame retardant, and will pass UL-94 V-0 and FAR 25.853 verfical burn requirements.
Mechanical Properties

Tested per MIL-R-7575C Grade A

Test Method

Requirement

Average

Flexural Strength

ASTM D790

50.0 ksi (345 MPa)

91.5 ksi (631 MPa)

Flexural Modulus

ASTM D790

2.7 msi (19 GPa)

3.3 msi (23 GPa)

Tensile Strength

ASTM D638

40.0 ksi (276 MPa)

61.6 ksi (425 MPa)

Compressive Strength

ASTM D695

35.0 ksi (241 MPa)

60.1 ksi (414 MPa)

Flammability (inch/min)

ASTM D635

1.0 (max)

did not reach reference

Water Absorption, 24 hr soak, % wt change

ASTM D570

+0.5 (max)

0.04

Barcol Hardness

see 4.6.4

55

81

Specific Gravity

ASTM D792

report

2.079

Resin Content (%)

ASTM C613

report

32.4

Tested Wet - Flexural Strength

ASTM D790

45.0 ksi (310 MPa)

85.4 ksi (589 MPa)

Tested Wet - Flexural Modulus

ASTM D790

2.5 msi (17 GPa)

3.6 msi (25 GPa)

Tested Wet - Tensile Strength

ASTM D638

38.0 ksi (262 MPa)

62.1 ksi (428 MPa)

Tested Wet - Compressive Strength

ASTM D695

30.0 ksi (207 MPa)

56.9 ksi (392 MPa)

Tested @ 156°F (70°C) - Flexural Strength

ASTM D790

40.0 ksi (276 MPa)

48.8 ksi (337 MPa)

Tested @ 156°F (70°C) - Flexural Modulus

ASTM D790

2.3 msi (16 GPa)

2.6 msi (18 GPa)

MIL-H-5606 Hydraulic Fluid (24 hr soak at RT)

 

 

% change in wt / % change in thickness

ASTM D543

0.2 (max)

0.04 / 0

Flexural Strength

ASTM D790

report

93.9 ksi (648 MPa)

TT-I-735 Isopropyl Alcohol (24 hr soak at RT)  

 

 

% change in wt / % change in thickness

ASTM D543

0.1 (max)

0.03 / 0

Flexural Strength

ASTM D790

report

88.7 ksi (612 MPa)

TT-S-735 Standard Test Fluids, Hydrocarbon, Type III (24 hr soak at RT) 

 

% change in wt / % change in thickness

ASTM D543

0.1 (max)

0.06 / 0

Flexural Strength

ASTM D790

report

96.9 ksi (668 GPa)

 
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NOTICE:Product data and parameters cited in this publication have been obtained in J.D. Lincoln, Inc. laboratories using the materials under carefully controlled conditions. The information, therefore, is believed to be accurate and correctly stated. Data of this type may be considered to be indicative of representative properties obtainable. J.D. Lincoln, Inc. cannot accept responsibility for the misapplication of these products, nor for their use under uncontrolled conditions. Numerical values resulting from the application of this material are dependant on processing details. It is recommended that the user develop his or her own application techniques and generate data consistent with his or her specific application and process.

 
       
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