DuPont™ Teflon® PFA 350 Typical Property Data

Typical Property Data
DuPont™ Teflon® PFA Fluoropolymer Resin
Grade 350 - ASTM D3307, Type II

PFA 350 has a low flow rate, increased flex life, and an enhanced resistance to stress cracking over other grades of PFA.
It is well suited to the transfer molding of linings onto fittings used in hostile chemical applications.

*Data should be used only as a guide in selecting the appropriate compound.*
Property	ASTM Test Method	Unit	**Nominal Value

Thermal
Nominal Melting Point	D3418	°C	302–310
		(°F)	(575–590)
Coefficient of Linear Thermal Expansion, 21–100°C	D696	mm/mm/°C	14 x 10–5
(70–212°F)		(in./in./°F)	(7.8 x 10–5)
100–149°C		mm/mm/°C	18 x 10–5
(212–300°F)		(in./in./°F)	(9.8 x 10–5)
149–208°C		mm/mm/°C	22 x 10–5
(300–408°F)		(in./in./°F)	(12.1 x 10–5)
Upper Service Temperature	—	°C	260
		(°F)	(500)
Flow Rate	D3307	g/10 min	2.0

Mechanical
Tensile Strength, 23°C (73°F)	D3307	MPa (psi)	28 (4,000)
250°C (482°F)			14 (2,000)
Specific Gravity	D792	—	2.12–2.17
Tensile Yield Strength, 23°C (73°F)	D3307	MPa (psi)	15.2 (2,200)
Ultimate Elongation, 23°C (73°F)	D3307	%	300
250°C (482°F)		%	500
Flexural Modulus, 23°C (73°F)	D790	MPa (psi)	625 (90,000)
250°C (482°F)		MPa (psi)	69 (10,000)
Hardness Durometer	D2240	—	D55
MIT Folding Endurance, 0.18–0.20 mm (0.007–0.008 in.)	D2176	cycles	*500,000

Electrical
Dielectric Strength, Short Time, 0.25 mm (0.010 in.)	D149	kV/mm (V/mil)	80 (2,000)
Dielectric Constant, 60–106 Hz	D150	—	2.03
Dissipation Factor, 60–106 Hz	D150	—	0.0001
Volume Resistivity	D257	ohm.cm	1018
General
Water Absorption, 24 hr	D570	%	< 0.03
Weather and Chemical Resistance	—	—	Outstanding
Limiting Oxygen Index	D2863	%	> 95

**Note: Typical properties are not suitable for specification purposes. Properties may vary based upon processing technique. Data should be used only as a guide in selecting the appropriate compound. Actual performance will be affected by processing methods as well as end use service conditions.
* Depending on fabrication conditions