1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 17 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.13, 3.14 & 4 deleted 1998 01 26 Activated B. Hennessey Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 4 O-RING, EPICHLOROHYDRIN RUBBER (ECO) 6
2、5 IRHD, WSD-M2D401-A4 COMPRESSIVE STRESS RELAXATION RESISTANT 1. SCOPE The material defined by this specification is an Epichlorohydrin Rubber O-Ring with good resistance to long-term Compressive Stress Relaxation. The material is resistant to fuel vapor and has a continuous operating temperature up
3、 to 125 C and peak operating temperature up to 150 C. The material has poor resistance to “Sour Gas” and should not be used where prolonged contact with liquid fuel is likely. 2. APPLICATION This specification was originally released for material used as Fuel Rail and Resonator O-Ring seals. 3. REQU
4、IREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING Whenever possible, all test specimens shall be die-cut from the finished parts. When no
5、t feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Hardness, International 60 - 70 IRHD (
6、ISO 48) 3.5.2 Tensile Strength, min 8.0 MPa (ISO 37, Die C) 3.5.3 Elongation at Break, min 400% (Test Method according to para 3.5.2) 3.5.4 Modulus at 100% Elongation, min 1.5 to 4.0 MPa (Test Method according to para 3.5.2) 3.5.5 Tear Strength, N/cm, min 10 25 kN/m (ISO 34, Method B, Procedure (a)
7、ASTM D 624, Die B) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D401-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.5.6 Brittleness Point, max -40 C (ISO 812, Type B specimen) 3.5.7 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.8 Compressi
8、on Set, %, max 60% (ISO 815 Method B except 25% compression, plied-up specimens, 70 h at 125 C +/- 2 C) 3.6 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 168 h at 150 +/- 2C) 3.6.1 Hardness Change, max +20 3.6.2 Tensile Strength Change, max -35% 3.6.3 Elongation at Break Change, max -60% 3.6.4 Visua
9、l Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1,000 h at 125 +/- 2C) 3.7.1 Hardness Change, max +20 3.7.2 Tensile Strength Change, max -35% 3.7.3 Elongation at Break Change, max -60% 3.7.4 Visual Evaluation No surface t
10、ackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL No. IRM 903 (ISO 1817, 168 h at 150 +/- 2 C) 3.8.1 Hardness Change -10 to +5 IRHD 3.8.2 Tensile Strength Change, max -40% 3.8.3 Elongation at Break Change, max -50% 3.8.4 Volume Change, max -0 to +10% 3.8.5 Visual Evaluation No
11、 surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSD-M2D401-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 3.9 IMMERSION IN FUEL C (ISO 1817, 70 h at 23 +/- 2 C) 3.9.1 Hardness, International Change -20 IRHD
12、3.9.2 Tensile Strength change max -60% 3.9.3 Elongation at Break Change, max -50% 3.9.4 Volume Change, max 0 to +40% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 IMMERSION IN 85% FUEL C +15% METHANOL (ISO 1817, 70 h at 23 +/- 2 C) 3.10.1 Hardness, Chan
13、ge, max -25 3.10.2 Tensile Strength Change, %, max -70% 3.10.3 Elongation at Break Change, %, max -60% 3.10.4 Volume Change, %, max 0 to +75% 3.10.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11 IMMERSION IN 15% FUEL C +85% METHANOL (ISO 1817, 70 h at 23 +/-
14、2 C) 3.11.1 Hardness, Change, max -15 3.11.2 Tensile Strength Change, %, max -50% 3.11.3 Elongation at Break Change, %, max -40% 3.11.4 Volume Change, %, max 0 to +35% 3.11.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSD-M2D40
15、1-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4 3.12 COMPRESSION STRESS RELAXATION (ISO 6056 at 25% compression) Measure the initial back-force (Fo) after 30 minutes at 23 +/- 2 C. Heat age at 125 +/- 2 C as per para 3 and take back-force (Ft) measuremen
16、ts at 23 +/- 2 C after 24, 48, 96, and 168 h and thereafter every 168 h until a total elapsed test time of 1,000 h has been completed. Plot Ft/Fo against log 10 time in hours. F1000/Fo, min 0.35 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Hardness, Durometer A 60 - 70 (ISO 868, Instantaneous)
