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A. Schulman Diamond Centrex® 821 ASA Weatherable Polymers Injection Molding Grade  (discontinued **)
Categories: Polymer; Thermoplastic; ASA Polymer
Material Notes: Centrex 821 resin is a medium-gloss, high-heat, medium-impact grade of ASA (acrylonitrile-styrene-acrylate). It is an injection molding grade with a good balance of physical properties, gloss and processing performance, along with good resistance to weather aging.

Applications: Centrex 821 resin is used for exterior applications. As with any product, use of Centrex 821 resin in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.

A. Schulman has acquired Network Polymers & Diamond Polymers.
Key Words: Weatherable Polymer
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Specific Gravity 1.05 g/cc1.05 g/ccASTM D792
Linear Mold Shrinkage 0.0050 - 0.0060 cm/cm0.0050 - 0.0060 in/inASTM D955
Melt Flow 9.0 g/10 min
@Load 10.0 kg,
Temperature 220 °C		9.0 g/10 min
@Load 22.0 lb,
Temperature 428 °F		ASTM D1238
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell R 101101ASTM D785
Tensile Strength, Yield 43.0 MPa6240 psichs 2.0 in/min; ASTM D638
Tensile Modulus 2.50 GPa363 ksichs 2.0 in/min; ASTM D638
Flexural Strength 69.0 MPa10000 psichs 0.05 in/min; ASTM D790
Flexural Modulus 2.40 GPa348 ksitangent; chs 0.05 in/min; ASTM D790
Izod Impact, Notched  0.270 J/cm
@Thickness 3.17 mm,
Temperature -40.0 °C		0.506 ft-lb/in
@Thickness 0.125 in,
Temperature -40.0 °F		ASTM D256
 1.60 J/cm
@Thickness 3.17 mm,
Temperature 23.0 °C		3.00 ft-lb/in
@Thickness 0.125 in,
Temperature 73.4 °F		ASTM D256
Impact Test  8.20 J
@Temperature -40.0 °C		6.05 ft-lb
@Temperature -40.0 °F		ASTM D3763
 33.0 J
@Temperature 23.0 °C		24.3 ft-lb
@Temperature 73.4 °F		ASTM D3763
 
Thermal PropertiesMetricEnglishComments
Deflection Temperature at 1.8 MPa (264 psi) 79.0 °C174 °F0.125";; ASTM D648
 88.0 °C190 °F0.5";; ASTM D648
Vicat Softening Point 112 °C
@Load 1.00 kg		234 °F
@Load 2.20 lb		120°C/hr; ASTM D1525
Flammability, UL94 HB
@Thickness 0.749 mm		HB
@Thickness 0.0295 in

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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PDIAM355 / 126446

Specialty Compounds RTP Company




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