info@dolphinmarines.com
Rubber Properties
DOLPHIN MARINE Rubber fender components are manufactured from the highest quality Natural Rubber (NR), optionally Styrene Butadiene SBR based compounds which meet or exceed the performance requirements of European Union specification EAU-E 62"Acceptance Requirements for Fender Elastomers".Typical specifications are listed in the table below.
In addition to NR and SBR, other rubber compounds in Butyl, EPDM, and Polyurethane are available on request for specialist applications.



Property

Testing Standard

Condition

Requirement

Tensile Strength

ASTM D412 Die C; AS 1180.2; BS 903.A2;

ISO 37; JIS K6301 Item 3, Dumbell 3

Original 

16MPa (Min)

Aged from 96Hours at 70°C

12.8MPa  (Min)

DIN 53504

Original

15N/mm2 (Min)

Aged for 168 hours at 70°C

12.75N/mm2 (Min)

Elongation at Break

ASTM D412 Die C; AS 1180.2; BS 903.A2;

ISO 37; JIS K6301 Item 3, Dumbell 3

Original 

400% (Min)

Aged for 96 hours at 70°C

320% (Min)

DIN 53504

Original

300% (Min)

Aged for 168 hours at 70°C

280% (Min)

Hardness

ASTM D2240; AS 1683.15.2; BS 903.A6; 

ISO 815; JIS K6301 Item 5A Tester

Original

78° (Max) Shore A

Aged for 96 Hours at 70°C

Original Value + 6°

points increase

DIN 53505

Original

75° (Max) Shore A

Aged for 168 hours at 70°C

Original Value + 5°

points increase

Compression Set

ASTM D395; AS 1683.13B; BS 903.A6; 

ISO 815; JIS K6301 Item 10

Aged for 22 hours at 70°C

30% (Max)

DIN 53517

Aged for 24 hours at 70°C 

40% (Max)

Tear Resistance

ASTM D624; AS 1683.12; BS 903.A3; 

ISO 34.1; JIS K6301 Item 9, Test Piece A

Die B

70kN/m (Min)

DIN 53507

80 N/cm (Min)

Ozone Resistance

ASTM D1149; AS 1683.24; 

BS 903.A43; DIN 53509; ISO 143/1

1ppm at 20% strain at 40°C for 100 hours

No cracking visible

by eye

Seawater Resistance

DIN 86076, Section 7.7

28 days in artificial

seawater at 95°C ±2°C

Hardness ±10° (Max)

Shore A

Volume +10/-5% (Max)

Abrasion Resistance

BS 903.A9

Method B, 1000

revolutions

0.5cc (Max)

DIN 53516

100mm3 (Max)

Bond Strength

Steel to Rubber

BS 903.A21

Method B

7N/mm (Min)



The above values are for tests carried out under strict laboratory conditions using specimens taken from batches of unvulcanised rubber compound。
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