Power Steering Systems: Low-Permeation HNBR Hoses for Hydraulic Fluid
Problem Statement
Hydraulic power steering systems require hoses with low fluid permeation to prevent leaks and maintain system efficiency. Standard NBR hoses degrade under high-temperature hydraulic fluids, leading to swelling, cracking, and permeation losses exceeding 0.5 g/m²/day.
Material Science Analysis
HNBR (Hydrogenated Nitrile Butadiene Rubber) outperforms NBR due to its saturated backbone structure. The hydrogenation process eliminates double bonds, enhancing thermal stability and chemical resistance. HNBR resists degradation from hydraulic fluids up to 150°C, with permeation rates below 0.1 g/m²/day. Its fluorine-free formulation ensures compatibility with ATF fluids.
Technical Specs
- Shore A Hardness: 70 ± 5
- Tensile Strength: 20 MPa
- Elongation at Break: 300%
- Temperature Range: -40°C to 150°C
- Compression Set: 15% (22 hours at 150°C)
Material Comparison
| Material | Permeation Rate (g/m²/day) | Temperature Range (°C) | Compression Set (%) | Chemical Resistance |
|---|---|---|---|---|
| HNBR | 0.1 | -40 to 150 | 15 | Excellent |
| NBR | 0.5 | -20 to 100 | 25 | Good |
| FKM | 0.05 | -20 to 200 | 10 | Excellent |
Standard Compliance
RubberQ adheres to IATF 16949 standards for batch-to-batch consistency. HNBR formulations comply with ASTM D2000 for material callouts and ISO 3601 for sealing performance. Surface preparation and bonding processes meet ASTM D429 adhesion requirements.
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
订阅技术更新
通过邮件接收最新材料洞察与工程案例速递。
相关文章
2026年4月05日
Liquid Silicone Rubber (LSR) Tooling: Why Initial Investment Pays Off in Precision.
Liquid Silicone Rubber (LSR) Tooling: Why Initial Investment Pays Off in Precision Problem Statement High-cycle manufacturing of precision components, such as EV battery seals and AI server gaskets, demands materials with exceptional dimensional stability and chemical resistance. Traditional elastomers like EPDM and NBR often fail under extreme thermal cycling and aggressive chemical exposure, leading to […]
阅读文章2026年4月05日
High-Tonnage Vulcanization: Managing Large-Scale Industrial Rubber Components.
High-Tonnage Vulcanization: Managing Large-Scale Industrial Rubber Components Problem Statement Large-scale industrial rubber components, such as conveyor belts and hydraulic seals, face premature failure under high-tonnage vulcanization. Common issues include chemical degradation at temperatures exceeding 200°C and compression set failure during high-pressure cycles. Material Science Analysis Standard EPDM polymers fail under extreme heat due to their […]
阅读文章2026年4月05日
Commercial Aircraft Interiors: Meeting Smoke and Toxicity Standards (FST).
Commercial Aircraft Interiors: Meeting Smoke and Toxicity Standards (FST) Problem Statement Polymer components in aircraft interiors must pass FAR 25.853 flammability tests while maintaining mechanical performance. Standard EPDM fails at 180°C with toxic smoke emission (HCN >100 ppm). Material Science Analysis Chloroprene rubber (CR) releases HCl gas during combustion. Fluorosilicone (FVMQ) provides superior thermal stability […]
阅读文章