Material Comparison
Compare verified engineering materials side by side with condition-specific mechanical properties.
| Parameter | Styrene-Butadiene Rubber (SBR) | Nitrile Butadiene Rubber (NBR) |
|---|---|---|
| Material Family | Rubber & Elastomers | Rubber & Elastomers |
| Subfamily | General-Purpose Diene Rubbers | Oil & Fuel Resistant Elastomers |
| ASTM Designation | SBR | NBR |
| ISO Designation | SBR | NBR |
| ASTM-D2000 Designation | Type AA / BA | Type BF / BG / CH |
| Element | Styrene-Butadiene Rubber (SBR) | Nitrile Butadiene Rubber (NBR) |
|---|
| Mechanical Parameter | Styrene-Butadiene Rubber (SBR)Standard Carbon Black Reinforced Vulcanizate (SBR 1500/1712 Series) | Nitrile Butadiene Rubber (NBR)Standard 70 Shore A O-Ring Vulcanizate (Medium ACN ~33%) |
|---|---|---|
| Compression Set (22h at 70°C) · Standard Carbon Black Reinforced Vulcanizate (SBR 1500/1712 Series) · RANGE · 70 °CUnit: % | 20–40 % | — % |
| Compression Set (22h at 100°C) · Standard 70 Shore A O-Ring Vulcanizate (Medium ACN ~33%) · RANGE · 100 °CUnit: % | — % | 15–30 % |
Machinability: Cryogenically frozen below -60°C for grinding, turning, and die cutting; readily trimmed using high-speed rotary steel knives and waterjet cutting.
Formability / Cold Working: Compounded in internal mixers with extensive carbon black or silica dispersion. Processable via multi-pass roll milling, calendar sheet extrusion, and transfer/injection molding.
Heat Treatment & Annealing: Vulcanized with sulfur-accelerator systems (sulfenamides, thiazoles, thiurams) at 150°C to 175°C. SBR crosslinks further during aging (oxidative hardening) rather than softening.
Machinability: Cryogenically deflashed with polycarbonate media or liquid nitrogen tumbling; turned on CNC lathes equipped with frozen chuck fixtures.
Formability / Cold Working: Readily compounded in internal mixers with carbon black, plasticizers (phthalates, adipates), and cure packages. Formed by high-precision compression, transfer, and multi-cavity injection molding; extruded into fuel hose inner tubes.
Heat Treatment & Annealing: Vulcanized with sulfur/accelerator packages for optimal dynamic fatigue or peroxide cure packages for improved compression set and heat resistance up to 120°C.