M21 - Hexcel.com

Description
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9 +=./(/98 +=)+11+39 *'2'-+ 941+7'3)+ +85+)/'11> '9 ./-. +3+7-> /25')98
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Benefits and Features
n =)+11+39 94:-.3+88 /3 5'79/):1'7 '9 ./-. +3+7-> /25')9
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Cure Cycle Viscosity Profiles
HexPly ® M21
11 +=5+7/2+398 9.+ 89 51> 8.4:1* (+ ;')::2 *+(:10+* 94 9.+ 24:1* '9 7442 9+25+7'9:7+ &')::2 *+(:10/3-
4, 8:(8+6:+39 51/+8 2'> (+ 3+)+88'7> 94 +38:7+ 7+24;'1 4, '/7 97'55+* *:7/3- 9.+ 1'> :5 574)+88 %.+ ,7+6:+3)> 4, *+(:10/3-
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200
180
160
140
120
100
80
60
200
180
160
140
120
100
80
60
Temperature
Temperature
Temperature

Prepreg Curing Conditions
HexPly ® M21
Defined heat-up rates will vary depending on the autoclave dimensions, the mass of tooling used and the size of the component to
be manufactured.
Typical Autoclave Cure Monolithic Part < 15mm thick (1)
551> ,:11 ;')::2 ('7
551> ('7 -':-+ ':94)1';+ 57+88:7+
#+*:)+ ;')::2 94 ' 8',+9> ;'1:+ 4, E ('7 ;'1:+ 4, E ('7 ('7 -':-+ ':94)1';+ 57+88:7+
*+5+3*+39 43 )47+ *+38/9>
#+24;+ ;')::2

180°C (350°F) curing epoxy matrix
Cured Unidirectional Prepreg Properties
42+3)1'9:7+ 7+8/3 7+8/3 )439+39 (>
- )2H
!
/(+7 +38/9>
- )2H
!
%.+47+9/)'1 '1):1'9+*
'2/3'9+ +38/9>
Mechanical Properties Units
- )2H
!
Temp
°C
dry
IM7
UD
194
M21/34%/ UD194/
IM7-12K
Test Standards U.S. Standards
1'88 %7'38/9/43
%+25+7'9:7+
A
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%+38/43 $97+3-9. "'
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(1) Specimen dimensions: 12.7mm wide and 127mm free length (0.5” wide and 5” free length)
(2) Specimen dimensions: 80x12.7mm (3.1”x0.5”)
(3) Specimen dimensions: 12.7mm wide and 127mm free length (+45/-45)s (0.5” wide and 5” free length)
(4) Specimen dimensions: 280x32 mm (11”x1.3”)
(5) Specimen dimensions: 305x38mm and 6.35mm hole diameter (12”x1.5” and 0.25” hole diameter)
(6) Specimen dimensions: 132x32mm and 32 mm free length (5.2”x1.3” and 1.3” free length)
M21/34%/ UD194/
AS7-12K
AS7
UD
194
M21/34%/ UD194/
AS7-12K
European standards
M21/34%/ UD194/
IMA-12K
IMA
UD
194
M21/34%/ UD194/
IMA-12K
E +=97'541'9+* 438+9 F

Cured Woven Prepreg Properties
HexPly ® M21
42+3)1'9:7+ 7+8/3 7+8/3 )439+39 (>

Prepreg Storage Life
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Definitions:
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!:9 /,+ %.+ 2'=/2:2 ')):2:1'9+* 9/2+ '114 9.+ ):8942+7 /3 ' 8+'1+* 24/89:7+ 5744, ('- '9 E A %4 ')):7'9+1> +89'(1/8.
9.+ +=')9 +=5/7> *'9+ )438:19 9.+ (4= 1'(+1
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Precautions For Use
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For More Information
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HexPly ® M21 Product Data