MIL-P-46183
(Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.)
2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence.
3. REQUIREMENTS
3.1 Material. The material shall consist of PEEK thermoplastic granules, pellets or powder, with or without fiber reinforcement.
3.2 Physical and mechanical properties. The properties of the PEEK thermoplastic shall be as specified herein when tested in accordance with 4.3. Mechanical properties are to be measured on specimens that have been injection molded to net shape.
3.2.1 Nonreinforced PEEK (type I). The properties of the unpigmented, non- reinforced PEEK thermoplastic shall be as specified in table I.
TABLE I. Properties of nonreinforced PEEK (type I).1/
Property Property Values Melting point (minimum) 334oC (633oF)
Glass transition temperature (Tg), min l43oC (289oF)
Specific gravity l.30 + 0.04
Tensile strength 2/ (minimum)
(at 23oC) 90 MPa
(l3,000 psi) (at 200oC) 20 MPa
(2,900 psi) Elongation at break (minimum) 10%
Flexural modulus (minimum) 3400 MPa
(500,000 psi)
Heat deflection temperature (minimum)
(at 1820 kPa) 149oC (300oF)
Water absorption (maximum)
(24-h immersion) 0.2%
1/ Property values are expressed in SI units in accordance with ASTM E380.
2/ MPa x 145 = psi
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