The CCSi ASTM D1329 51 mm Specimen Cutting Die is manufactured for laboratories preparing 51 mm circular specimens used in ASTM D1329 thermal conductivity testing.
Unlike general-purpose cutting dies, this tool is designed specifically to deliver highly repeatable specimen dimensions that help minimize preparation variability during material testing.
Each die is produced entirely in-house from American-made tool steel using precision machining, wire EDM, heat treatment, sharpening, and dimensional certification. The result is a durable cutting die that can be resharpened repeatedly without changing the finished specimen size.
Standard features include:
- 51 mm precision specimen diameter
- Wire EDM manufactured cutting profile
- Laser-engraved identification
- Rugged protective carrying case
- Compatible with clicker-style presses
CCSi’s vertically integrated manufacturing process ensures consistent quality from raw material through final inspection.
This test method is carried out by:
- elongating the specimen;
- locking it in the elongated condition;
- “freezing” it to a state of reduced elasticity;
- releasing the specimen and allowing it to retract freely while raising the temperature at a uniform rate;
- measuring the length of the specimen at regular temperature intervals while it is retracting;
- computing the percentage retraction at the temperature intervals.
Three die lengths (the narrow rectangular portion) are specified in the method: 25, 38, and 51 mm, while the end “tabs” are all of the same dimensions. These are used according to the ultimate elongation and the limitations of the specimen racks.
In practice, the temperatures corresponding to 10% (TR10) and 70% (TR70) retraction are of particular importance.
The difference in the temperature between 10% retraction and 70% retraction increases correspondingly to an increase in crystallization. Where TR70 correlates with low-temperature compression set, TR10 correlates with brittleness points in vulcanizates with similar polymers. The retraction rate correlates with low temperature flexibility of both crystallizable and non-crystallizable rubbers.
This test provides for the evaluation of the effect of crystallization and comparing viscoelastic properties of materials at low temperatures. When employed in conjunction with other low temperature tests, it is very useful in selecting materials for low temperature applications.
Options include:
- ISO-17025 Certification
- Arbor Press Adapter (post type, dimensions to be specified at purchase)
- Mallet Handle
- NAEF brackets and ejectors
- Custom brackets and adapters
$865.00
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