Stainless steel is the other metallic PTFE filler choice when extremely wear resistance to high temperatures is required. Stainless steel is added in in high amounts, usually 50% in weight, which is equivalent to 15% in volume, to improve the thermal conductivity and reduce the deformation under load when Stainless steel-filled PTFE materials are subjected to load at extreme temperatures.
Stainless steel-filled PTFE materials have very good abrasion resistance and compressive strength. Stainless steel-filled PTFE materials are typically used for seats and seals that required high heat and steam applications.
Moreover, stainless steel-filled PTFE materials are highly machinable and comply with FDA and EC regulations, so they are the preferred choice in the food processing industry.
Extremely hard wearing
Excellent under extreme loads
Excellent under extreme temperatures
Lowers creep, cold flow and wear
Increased thermal and electrical conductivity
Property | Test Method | Units | Stainless Steel |
---|---|---|---|
Color | - | - | Gray |
Specific Gravity | ASTM D4894 | - | 3.200 - 3.600 |
Hardness Shore D | ASTM D2240 | - | 63 - 73 |
Tensile Strength, min. | ASTM D4745 | PSI [MPa] | 2,200 [15.2] |
Elongation at Break, min. | ASTM D4745 | % | 120 |
Second Melt Peak Temp. | ASTM D3418 | °F [°C] | 621 [327] |
Glass Transition Temp. | ASTM D3418 | °F [°C] | -143 [-97]; 246 [119] |
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