MIL-P-46183
3.2.2 Glass fiber reinforced PEEK (type II). The properties of glass fiber reinforced PEEK thermoplastic shall be as specified in table II.
TABLE II. Properties of glass fiber reinforced PEEK (type II).
Property Values Property Class 1 Class 2 Class 3
(l0% glass fiber) (20% glass fiber) (30% glass fiber)
Glass fiber content Specific gravity Tensile strength 1/ |
l0 + 2% (by 1.37 + 0.04 110 MPa |
wt) |
20 + 2% (by 1.44 + 0.04 120 MPa |
wt) |
30 + 2% (by wt) 1.49 + 0.04 152 MPa |
||
(minimum) |
(16,000 psi) |
(17,400 psi) |
(22,000 psi) |
||||
Elongation at break (minimum) |
5% |
4% |
3% |
||||
Flexural modulus (minimum) |
5000 MPa (730,000 |
psi) |
6200 MPa (900,000 |
psi) |
6900 MPa (1,000,000 psi) |
||
Impact strength 2/ 50 J/m 60 J/m 80 J/m
(minimum) (0.9 ft-lbf/in) (1.1 ft-lbf/in) (1.5 ft-lbf/in)
1/ MPa x 145 = psi
2/ Notched, 0.25 in; J/m x l8.73 x l0-3 = ft-lbf/in
3.2.3 Carbon fiber reinforced PEEK (type III). The properties of carbon fiber reinforced PEEK thermoplastic shall be as specified in table III.
TABLE III. Properties of carbon fiber reinforced PEEK (type III).
Property Values Property Class 1 Class 2
(20% carbon fiber) (30% carbon fiber)
Carbon fiber content Specific gravity Tensile strength |
20 + 2% (by 1.38 + 0.04 159 MPa |
wt) |
30 + 2% (by wt) 1.42 + 0.04 185 MPa |
|
(minimum) |
(23,000 psi) |
(27,000 psi) |
||
Elongation at break (minimum) |
5% |
2% |
||
Flexural modulus (minimum) |
10,300 MPa (l,500,000 |
psi) |
12,800 MPa (1,850,000 psi) |
|
Impact strength (minimum)
(notched, 0.25 in) 45 J/m 50 J/m
(0.8 ft-lbf/in) (0.9 ft-lbf/in) (unnotched, 0.25 in) 400 J/m 530 J/m
(8.0 ft-lbf/in) (l0.0 ft-lbf/in)
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