Rubber Properties

Boomarine supplied rubber fenders are manufactured from high-quality nature rubber and other styrene Butadiene SBR based compounds to satisfy various performance requirements. Other special rubber is also available upon customer’s special requirements, the main performance index is shown as below:

No. Property Testing Standard Standard Value
1 Tensile strength GB/T528,I; ASTM D412 Die C; ISO 37; Din 53504;
AS 1180.2; BS903.A2;JIS K62551 Item 3
 16Mpa
2 Elongation at break GB/T528,I; ASTM D412 Die C; ISO 37; Din 53504;
AS 1180.2; BS903.A 2;JIS K62551 Item 3
 300%
3 Compression Set(70?,22h,20%) GB/T7759,I; ASTM D395 ;ISO 815; Din 53517;
AS 1683.13B; BS903.A 6;J IS K6262 Item 10
 30%
4 Hardness(Shore A) GB/T531; ASTM D2240; ISO 815;Din 53505
AS 1683.15.2; BS903.A 26; JIS K6301 Item 5A Tester
≤ 82 Ddgreee
5 Tear resistance Die B GB/T529,Crescent Test Piece; ASTM D624; ISO 34.1; Din 53507; AS 1683.12;BS903.A3; JIS K6301 Item 9A
Test Piece A
 70N/mm
6 Ozone resistance(50pphm at 40oC at 20% strain at for 96
hours)
GB/T13642; ASTM D1149; ISO 34.1;Din 53509 AS 1683.24; BS903.A 43 No cracking visible by eye
7 Abrasion resistance(Method B
1000 Revolutions)
GB9867; BS903.A 9; DIN53516  0.5CC
8 Bond strength of steel to
rubber Method B
HG4-854; BS903.A 21  7N/mm
9 Hot air aging Variation ratio of 
tensile strength
GB/T3512; ASTM D412 Die C; ISO 37; Din 53504; AS 1180.2; BS903.A 19; JIS K6301 Item 3  30%
Variation ratio
of elongation at break
GB/T3512; ASTM D412 Die C; ISO 37; Din 53504 AS 1180.2; BS903.A 19; JIS K6301 Item 3  30%

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