Product Description
HMD materials are ideal for damping applications that require thick, stiff
substrates. These applications are typically found in ship building, construction
equipment and other industrial applications.
• Optimal for use on 1/8” to 1” steel
• Durable for use in harsh environments
PRODUCT
BULLETIN
HMD Series Damping Materials
HMD materials exhibit
excellent damping over a
broad temperature range
0.16
0.18
0.14
0.12
0.10
0.08
0.06
0.04
0 500 1000 1500 2000 2500 3000 3500 4000 4500
55°F 75°F
50 00
NOMINAL DAMPING FOR HMD-50
ON 3/8" STEEL BAR
NOMINAL DAMPING FOR HMD-50
ON 3/8" STEEL BAR
SYSTEM LOSS FACTOR
FREQUENCY (Hz)
TYPICAL PROPERTIES HMD-25 HMD-50 HMD-75
Thickness
0.25” 0.50” 0.75”
Operating Temperature Range
35°F to 115°F
Density
1.54 g/cc
Tile Size
12” × 12”± 1/16”
Flame Retardant
ASTM D635
Self Extinguishing
Water Resistance
ASTM D543-06
+0.08%
Fuel Resistance
ASTM D543-06
+0.19%
159
Aearo Technologies LLC • a 3M company
7911 Zionsville Road, Indianapolis, IN 46268
U.S. Toll Free: 877-327-4332 Web: www.earglobal.com solutions@earglobal.com
E-A-R and 3M are trademarks
of 3M company and its affiliates.
© 2016 Aearo Technologies LLC, printed 2/16
PRODUCT
BULLETIN
HMD Series Damping Materials
159
Aearo Technologies LLC • a 3M company
7911 Zionsville Road, Indianapolis, IN 46268
U.S. Toll Free: 877-327-4332 Web: www.earglobal.com solutions@earglobal.com
E-A-R and 3M are trademarks
of 3M company and its affiliates.
© 2016 Aearo Technologies LLC, printed 2/16
Technical Information
The technical information, recommendations and other statements contained in this document are based upon tests or experience that Aearo Technologies believes are reliable,
but the accuracy or completeness of such information is not guaranteed.
Product Use
Many factors beyond Aearo Technologies’s control and uniquely within user’s knowledge and control can affect the use and performance of a Aearo Technologies product in a
particular application Given the variety of factors that can affect the use and performance of an Aearo Technologies product, user is solely responsible for evaluating the Aearo
Technologies product and determining whether it is fit for a particular purpose and suitable for user’s method of application.
Warranty, Limited Remedy, and Disclaimer
Unless an additional warranty is specifically stated on the applicable Aearo Technologies product packaging or product literature, Aearo Technologies warrants that each Aearo
Technologies product meets the applicable Aearo Technologies product specification at the time Aearo Technologies ships the product. Aearo Technologies MAKES NO OTHER
WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the Aearo Technologies
product does not conform to this warranty, then the sole and exclusive remedy is, at Aearo Technologies’s option, replacement of the Aearo Technologies product or refund of the
purchase price.
Limitation of Liability
Except where prohibited by law, Aearo Technologies will not be liable for any loss or damage arising from the Aearo Technologies product, whether direct, indirect, special,
incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability.