HexWeb® HRH-327

Identification & Functionality

Core Type

FRP Honeycomb

Reinforcement Material

Glass Fibers

Composite Materials Functions

Core Material

Technologies

Composite Materials

Product Families

Composite Materials — Core Materials

Honeycomb

Features & Benefits

Materials Features

Thermally Insulating

Product Highlights

• High-strength retention up to 500°F continuous service
• 700°F short and intermittent term exposures
• All polyimide resin and adhesive system
• Good insulation properties
• Good dielectric properties

Applications & Uses

Markets

Automotive & Transportation,

Electrical & Electronics

Applications

Electrical & Electronics — Parts & Components

Housings & Enclosures

Automotive & Transportation — Transportation

Aerospace & Aviation,

Marine,

Rail & Mass Transit

Applications

A high-temperature nonmetallic honeycomb for use in sandwich structures that require good electrical properties or that see service temperatures in the range of 350°F-500°F. Applications include sandwich structures for Mach 2 and Mach 3 aircraft, high-energy radomes, structural and acoustical engine inlets and liners.

Properties

Mechanical Properties

Hexcel Honeycomb Designation	Compressive			Plate Shear
	Stabilized			L Direction			W Direction
Material-Cell- Size-Density	Strength psi		Modulus ksi	Strength psi		Modulus ksi	Strength psi		Modulus ksi
	typ	min	typ	typ	min	typ	typ	min	typ
HRH-327 – 1/8 – 3.2	310	220	27	195	140	140	95	70	7.5
HRH-327 – 1/8 – 5.5	790p	600p	80p	465p	300p	300p	245p	175p	14.5p
HRH-327 – 3/16 – 4.0	440p	340p	40p	280p	200p	200p	130p	90p	10.0p
HRH-327 – 3/16 – 4.5	520	400	58	320	220	220	150	110	11
HRH-327 – 3/16 – 5.0	600p	480p	68p	370p	280p	280p	180	135p	12.0p
HRH-327 – 3/16 – 6.0	780	625	87	460	345	345	230	170	15
HRH-327 – 3/16 – 8.0	1210	1000	126	700	490	490	420	300	22

p = preliminary values. Test data obtained at 0.500 inch thickness.

• HRH-327 Honeycomb is normally not tested for bare compressive strength.
• Tolerance for nominal densities shown above is ± 10%
• Post cure (550° or 700°) must be specified when ordering

Technical Details & Test Data

Post-Cured HexWeb® HRH-327

Typical Strength Retention at Elevated Temperatures

Packaging & Availability

Standard Dimensions

HexWeb® HRH-327 polyimide honeycomb materials are available in the following standard cell sizes and dimensions:

Product – Cell	L	W	T Min.
HRH-327 – 1/8 in.	42 in. ± 1 in.	72 in. ± 3 in.	0.125
HRH-327 – 3/16 in.	42 in. ± 1 in.	72 in. ± 3 in.	0.125

Thickness Tolerance

Tolerances on cut thickness are as follows:

• 0.125 in. to 1.500 in. tolerance will be ± 0.006 in.
• 1.501 in. to 3.000 in. tolerance will be ± 0.010 in.
• 3.001 in. and over tolerance will be ± 0.062 in

Dimensional Nomenclature

T = Thickness, or cell depth
L = Ribbon direction
W = Transverse direction, or direction perpendicular to the ribbon