1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Released 2013 10 31 N Status Replaced by WSK-M2G299-B2 for pumpables,WSK-M4G325-A1 for tapes J. Herl, EU 1994 12 14 Revised and Retyped was: 14 pages 1988 12 01 B/031518 TP Revised Sheet 2 1981 05 08 B/453222 TP
2、Last Release WP 3948-a Page 1 of 7 EXPANDING SEALING STRIP, SPOT WELDABLE, HEAT CURING SK-M4G9506-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an extruded, self adhesive, spot weldable, heat curing and expanding sealing strip based on butyl rubber, and with
3、or without thread reinforcement. 2. APPLICATION This material was originally released for sealing spot weld joints on air extraction C-pillar, and is applied to oiled surfaces. 3. REQUIREMENTS 3.1 DIMENSIONSAs specified on Engineering drawing; see 5.2 3.2 COLOR Black 3.3 SOLIDS, min 99.0 % (FLTM EU-
4、BV 50-10) 3.4 ASH, max 50.0 % (FLTM EU-BV 50-10) 3.5 DENSITY at 20 C 1.2 - 1.5 g/cm3 The density tolerance for any one supplier shall be +/- 0.05 g/cm3 based on the recorded density of his original approved sample, as determined per ASTM D 297, Hydrostatic Method. 3.6 PENETRATION at 20 C (ASTM D 5,
5、0.981 N total weight force, 5 s dwell time) 3.6.1 As Received 60 - 90 3.6.2 After Ageing 50 - 90 (14 days at 30 +/- 2 C) ENGINEERING MATERIAL SPECIFICATION SK-M4G9506-A WP 3948-bPage 2 of 7 Note: Final approval of a specific penetration of material for production shipments shall be made by affected
6、Manufacturing Division. In all cases, however, the penetration shall be within the limits specified above and the material shall meet all requirements of this specification (Control Sample Laboratory Report). 3.7 COLD RESISTANCE AFTER AGEING No chipping Test Method: 1)Apply strips of material under
7、test 250 mm long and 8 mm in diameter to the middle of 300 x 100 mm test panels, prepared according to FLTM EU-BV 50-11, “Normal Grade“ and press down lightly. 2)Expose test assemblies according to FLTM EU-BV 50-5, Table 1 for a)minimum curing cycle b) maximum curing cycle 3)Expose test assemblies i
8、n a mechanically convected air dry oven at 80 +/- 2 C for two weeks. 4)After cooling to room temperature expose test assemblies and bending fixture (see FLTM EU-BV 53-4, except 100 mm mandrel) in a cold box at - 30 +/- 1 C for 4 hours. 5)While still in the cold box bend test assemblies within 2 seco
9、nds around the 100 mm mandrel through an angle of 90 deg. 3.8 FLOW RATE No flow Test Method: 1)Preparation of test assemblies according to 3.7 paragraph 1. 2)After 10 minutes at room temperature expose test assemblies at an angle of 45 deg to the horizontal in a mechanically convected air dry oven m
10、aintained at 100 +/- 2 C for 30 minutes, and with the longitudinal axis of the strip in the horizontal. 3.9 RESISTANCE TO CORROSION No corrosion (FLTM EU-BV 53-11, Method A, using strips of 8 mm in diameter) ENGINEERING MATERIAL SPECIFICATION SK-M4G9506-A WP 3948-bPage 3 of 7 3.10 WATER ABSORPTION,
11、max 5 % (FLTM EU-BV 53-7, use strips of 8 mm in diameter and 50 mm in length. Heat cure according to FLTM EU-BV 50-5, Table 1 using separate specimens) a) minimum curing cycle b) maximum curing cycle 3.11 FLAMMABILITY AND CORROSION Self-extinguishing with 5 s, no (FLTM EU-BV 59-2, Method A) corrosio
12、n Use strips of 8 mm in diameter. Immediately after welding separate the welded parts using a test fixture according to FLTM EU-BV 59-1, Fig 4. Examine after 48 hours at room temperature. 3.12 VOLUME EXPANSION 25 - 65 % Test Method: 1)Determine the volume V1 of clean 150 x 25 mm test panels. 2)Apply
13、 test strips 8 mm in diameter and 100 mm in length and determine volume V2. 3)Expose separate test assemblies according to FLTM EU-BV 50-5, Table 1 for a) minimum curing cycle b) maximum curing cycle 4)After cooling to room temperature determine volume V3. Note: Determine volumes by water displaceme
14、nt. The volume increase in % of the original volume shall be determined as follows: V3 - V2 % Volume Expansion = - x 100 V2 - V1 Where: V1 =Volume of test panel V2 =Volume of the test panel and sealing strip V3 =Volume of the test panel and sealing strip after cure. ENGINEERING MATERIAL SPECIFICATIO
15、N SK-M4G9506-A WP 3948-bPage 4 of 7 3.13 WASH AND PHOSPHATING SOLUTION RESISTANCE 3.13.1 Non-cured MaterialNo evidence of dissolution or lifting from panel Test Method: 1)Apply test strips 8 mm in diameter and 250 mm in length to 250 x 60 mm oiled test panels, prepared according to FLTM EU-BV 50-11,
16、 “Normal Grade“. 2)After conditioning for 2 hours at room temperature expose test assemblies one after another in each wash and phosphating solution of the affected plant where this material is to be used and maintain for 15 minutes at 60 +/- 1 C. 3.13.2 Cured Material No chipping Test Method: 1)Tes
17、t specimens as prepared and tested under clause 3.13.1 shall be exposed for 20 minutes in a mechanically convected air dry oven maintained at 100 +/- 2 C, and subsequently subjected to maximum curing cycle according to FLTM EU-BV 50-5, Table 1, Phase 1 and 2. 2)After cooling to room temperature test
18、 according to FLTM EU-BV 53-4, Method A, paragraph 4 and 5 except at - 30 +/- 1 C. 3.14 ADHESION STRENGTH AFTER CURING (FLTM EU-BV 54-3, Method B and C, preparation of test panels according to Section I, 8 mm dia test strips compressed to X = 3 mm, minimum and maximum heat curing cycle to FLTM EU-BV
19、 50-5, table 1) 3.14.1 Shear Strength at Room Temperature, min 3 N/cm2 3.14.2 Peel Strength at Room Temperature, min 10 N/cm 3.15 STRUCTURE AFTER CURING The sealer shall form a closed skin after heat curing. The inner cell structure shall be fine without large voids. Test Method: 1)Test assemblies a
20、ccording to clause 3.7, paragraph 1 and 2. 2)After cooling to room temperature test specimens are cut through and examined visually. ENGINEERING MATERIAL SPECIFICATION SK-M4G9506-A WP 3948-bPage 5 of 7 3.16 ADHESION STRENGTH The sealing strip must adhere to the test panel for a minimum of 30 seconds
21、 without loss of adhesion. Test Method: Place a section of sealing strip 100 mm in length on a body steel panel 300 x 200 mm, prepared according to FLTM EU-BV 50-11, “normal oiling grade“, with light finger pressure. After a storage time of 5 minutes at room temperature the panel is turned upside do
22、wn so the sealing strip is held only by means of its own adhesion strength. 3.17 SEALING ABILITY No displacement, no water leakage Test Method: 1)Apply test strips 8 mm in diameter and 250 mm in length in a U-shape to 150 x 100 mm test panels, prepared according to FLTM EU-BV 50-11, “Normal Grade“.
23、The distance between panel edges and test strip shall be minimum 2 mm. 2)Cover each test assembly with a test panel prepared as described under 1 above, using 5 mm spacers and press together with clamps. 3)After 2 hours at room temperature immerse test assemblies in solvent according to S-M14J132-A
24、for 5 minutes at room temperature. 4)Immerse test assemblies one after another in each wash and phosphating solution of the affected plant where this material is to be used and maintain for 15 minutes at 65 +/- 2 C. 5)Expose separate test assemblies according to FLTM EU-BV 50-5, Table 1, phase 1 and
25、 2 for a)minimum curing cycle b)maximum curing cycle 6)After 24 hours at room temperature fill space formed between test panels up to 2/3 with distilled water. Cover water containing compartment to reduce evaporation losses and store in vertical position for 24 hours at room temperature. 3.18 WETTIN
26、G (FLTM EU-BV 53-8, Method A, use test strips 8 mm in diameter and 250 mm long) The enamel shall form a continuous film over the sealing strip. Discoloration or staining permitted. ENGINEERING MATERIAL SPECIFICATION SK-M4G9506-A WP 3948-bPage 6 of 7 3.19 HEALTH HAZARDS AND ODOR The material must not
27、 contain any ingredients (matter) which, under normal production conditions, could lead to health hazards such as skin rash or irritation (dermatitis), irritation of the mucous membranes, difficulties in breathing etc. The material shall be free from objectionable odors both as received and after st
28、orage. 3.20 QUALITY The material shall be of uniform quality free from foreign material and properties detrimental to normal production use. It shall not cause excessive soiling of handlers in normal production use. 3.21 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be e
29、quivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the mat
30、erials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification
31、 are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Materials Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification
32、must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Mat
33、erials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification (test results, not nominal values), the material designation and code
34、 number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Appro
35、ved Source List. ENGINEERING MATERIAL SPECIFICATION SK-M4G9506-A WP 3948-bPage 7 of 7 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 STORAGE STABILITY (From date of receipt at Ford Motor Company)
36、Minimum 6 months when stored between 5 C and 28 C. 5.2 SUFFIX CODES FOR DIMENSIONS Note: Dimensional tolerance for any of the following dimensions is + 1 mm unless otherwise specified. A = 5 mm dia B = 8 mm dia C = 12 mm dia D = 16 mm dia E = 10 x 3 mm F = 15 x 3 mm G = 20 x 4 mm H = 30 x 3 mm J = 15 x 1 mm K = 6 mm dia L = 10 x 1 mm M = 25 x 2.5 mm N = 4 mm dia O = 12 x 2 mm
