1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions Rev. 0 2010 05 13 Activated A. Wedepohl, NAPrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 2 ELASTOMER, POWER STEERING HOSE WSS-M2D513-A 1. SCOPE The materials defined by this specification are for rubbe
2、r compounds used in hydraulic power steering hoses. 2. APPLICATION This specification was released to standardize the time, temperatures, and fluid type for material property testing of rubber compounds used in high pressure, low pressure, and suction lines in the hydraulic power steering system. 3.
3、 REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 FINISHED HOSE AND ASSEMBLIES This specification must be used with an Engineering Specification whic
4、h defines the requirements for functional performance. When this specification was written ES-BC34-3A719-AA was the latest ES. The following tests shall be performed with specimens cut from molded test slabs manufactured from the same material with an equivalent state of cure as the finished part. 3
5、.3 ORIGINAL PROPERTIES 3.3.1 Hardness, Durometer A Report (ASTM D 2240/ISO 868, instantaneous, plied-up specimen) 3.3.2 Tensile Strength, MPa Report (ASTM D 412, Die C) 3.3.3 Elongation, % Report (ASTM D 412, Die C) 3.3.4 Ozone Resistance, Rating Report (FLTM BP 101-01, Procedure B) 3.3.5 Compressio
6、n Set, % Report (ASTM D 395, Method B, 70 h at 125 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D513-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 2 3.4 AGED PROPERTIES 3.4.1 Heat Aged, Cover Only (ASTM D 573, 168 h at 125 +/- 2 C) Hardness Change, IRH
7、D Report Tensile Strength Change, Report Elongation at Break Change Report Visual Evaluation: No surface tackiness or cracks when folded flat against itself. 3.4.2 Heat Aged, Cover Only (ASTM D 573, 1000 h at 125 +/- 2 C) Hardness Change, IRHD Report Tensile Strength Change Report Elongation at Brea
8、k Change Report Visual Evaluation: No surface tackiness or cracks when folded flat against itself. 3.4.3 Immersion in Power Steering Fluid, Tube Only (ASTM D 471, 168 h at 105 +/- 2 C WSS-M2C938-A (Type A) Hardness Change, IRHD Report Tensile Strength Change Report Elongation at Break Change Report
9、Visual Evaluation: No surface tackiness or cracks when folded flat against itself. 3.4.4 Immersion in Power Steering Fluid, Tube Only (ASTM D 471, 1000 h at 105 +/- 2 C WSS-M2C938-A (Type A) Hardness Change, IRHD Report Tensile Strength Change Report Elongation at Break Change Report Visual Evaluati
10、on: No surface tackiness or cracks when folded flat against itself. 3.4.5 Immersion in Oil IRM 903, Tube Only (ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change, IRHD Report Tensile Strength Change Report Elongation at Break Change Report Visual Evaluation: No surface tackiness or cracks when folded
11、 flat against itself. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification Hose constructions may consist of the following materials. High Pressure hose: Chlorinated polyethylene (CPE) tube and cover with braided nylon reinforcement. Low Pressure: Chlorinated polyethylene (CPE) tube and cover with braided polyester reinforcement. Suction Hose: Chlorinated polyethylene (CPE) with or without reinforcement.
