Divinycell HCP grade meets the demand for a high performance,
low density buoyancy material with excellent characteristics. It is
widely used in submarines, subsea buoyancy units, ROVs, diving
bells and impact protection structures. As a result of its excellent
hydraulic compressive properties and closed cell structure, it has
very low buoyancy loss and water absorption under long-term
loading conditions. HCP stands for Hydraulic Crush Point and is
defined as the point of pressure in Bar, where the material when
subjected to an increasing pressure of 1-2 Bar/sec has lost 5%
of its initial volume. The design of subsea buoyancy applications
is complex and consideration has to be given to the required
buoyancy loss and updrift requirements over the expected
lifetime and service conditions, with respect to long and short
term hydraulic compressive creep, water absorption and hydraulic
fatigue. Please contact Diab Technical Services for design proposal.
THE HIGH PERFORMANCE SANDWICH CORE
Excellent buoyancy performance
High impact resistance
Low water absorption
Good insulation properties
Thermoformable
Superior damage tolerance
Fast and easy to machine
Good chemical resistance
High temperature resistance
PRODUCT CHARACTERISTICS
diabgroup.com
MECHANICAL PROPERTIES DIVINYCELL
HCP
TECHNICAL DATA
Divinycell HCP
All values measured at +73.4 F
1. Properties measured perpendicular to the plane
Nominal value is an average value of a mechanical property at a nominal density
Minimum value is a minimum guaranteed mechanical property a material has independently of density
Property Test Pr ocedure Unit HCP 30 HCP50 HCP70 HCP90 HCP100
Density ISO 845 lb/ft
3
Nominal 12.5 15.6 19.4 23.7 25.6
Maximum 14.4 18.1 21.2 25.9 28.4
Minimum 11.2 15 18.4 22.2 24.3
Hydraulic Crush Point – Bar – 30-39 50-59 70 -79 90-99 100-109
Compressive Strength
1
ASTM D 1621 psi
Nominal 783 1,044 1,175 1,479 1,682
Minimum 653 885 1,015 1,305 1,450
E-modulus (extensometer)
1
ASTM D 1621 psi
Nominal 44,965 58,015 72,519 85,572 94,275
Minimum 38,435 50,763 56,565 71,068 78,320
Tensile Strength
1
ASTM D 1623 psi
Nominal 1,030 1,334 1,595 1,827 1,958
Minimum 914 1,160 1,450 1,668 1,769
Shear Strength ASTM C 273 psi
Nominal 508 653 754 943 1,059
Minimum 464 566 609 870 943
Shear Modulus ASTM C 273 psi
Nominal 10,590 14,070 16,679 21,321 24,656
Minimum 9,427 11,748 13,053 18,275 21,175
Shear Strain ASTM C 273 % Nominal 45 45 35 35 35
Disclaimer:
This data sheet may be subject to revision and changes due to development
and changes of the material. The data is derived from tests and experience. If
not stated as minimum values, the data is average data and should be treated
as such. Calculations should be verified by actual tests. The data is furnished
without liability for the company and does not constitute a warranty or repre-
sentation in respect of the material or its use. The company reserves the right
to release new data sheets in replacement.
All content in this publication is protected by international copyright laws.
Copyright Diab June 2020.
Diab Group
Drottninggatan 7, 5th floor
SE-252 21 Helsingborg, Sweden
Tel +46 (0) 430 163 00
E-mail: info@diabgroup.com
Datasheet Diab Divinycell HCP rev20 IMP Jan 2022
TECHNICAL CHARACTERISTICS
PHYSICAL CHARACTERISTICS
TECHNICAL CHARACTERISTICS DIVINYCELL
HCP
1. Typical values
2. Thermal conductivity at +50 F
1. Buoyancy above is calculated at surface level and with nominal density. Please contact Diab for detailed analyse before selecting material.
2. Operational depth above is calculated with a max 5% buoyancy loss over 10 years operational time.
Depth shown are for guidance only and can be optimized for individual conditions. Always contact Diab for advice before selecting material.
Buoyancy calculated in sea water (density 63.99 lb/ft3).
Operating temperature is typically -325 F to +176 F. Normally Divinycell HCP can be processed up to +194 F without dimensional changes.
Maximum processing temperature is dependent on time, pressure and process conditions. Therefore, users are advised to contact Diab Technical Ser-
vices to confirm that Divinycell HCP is compatible with their particular processing parameters.
Format Unit HCP30 HCP50 HCP70 HCP90 HCP100
Plain sheets
Length inch 68.11 64.57 55.51 52.76 51.57
Width inch 33.46 31.50 27.56 25.98 25.20
Thickness inch 2.36 2.13 1.22 1.06 0.91
Can be bonded to larger dimensions upon request.
Type Buoyancy
1
(lb/ft
3
) Operational depth
2
(ft) Crush depth (ft)
HCP30 51.5 623 984
HCP50 48.4 984 1,640
HCP70 44.6 1,476 2,297
HCP90 40.3 1,804 2,953
HCP100 38.4 2,133 3,281
Characteristics
1
Unit HCP30 HCP50 HCP70 HCP90 HCP100 Test method
Closed cells % >99 >99 >99 >99 >99 –
Thermal conductivity
2
Btu x in / (ft
2
x h x F)0.340 0.354 0.396 0.403 0.416 EN 12667
Coeff, linear heat expansion x10
-6
/ F 20.6 20.6 20.6 20.6 20.6 ASTM D 696
Continous temp range F -325 to +176-325 to +176-325 to +176-325 to +176-325 to +176 –
Max process temp F +19 4 +19 4 +19 4 +19 4 +19 4 –
Dissipation factor – 0.0015 0.0020 0.0024 0.0030 0.0034 ASTM D 2520
Dielectric constant – 1.25 1.32 1.39 1.47 1.53 ASTM D 2520