1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Para No. Changes1981 12 23 Released PCR PR991014-P3WP 3948-a Page 1 of 2 GASKET, CELLULOSE FIBER - MINERAL/NITRILE RUBBER ESP-M8G163-A1. SCOPEThe material defined by this specification is a gasket constructed ofsy nthetic, min
2、eral and cellulose fiber and mineral reinforcing materialsand a ni trile rubber binder, offering high torque retention under flangeloads.2. APPLICATIONThe material was released origi nally for front pump and servo piston covergaskets on automatic transmissions.3. REQUIREMENTSAll tests and conditioni
3、ng shall be conducted in accordance with ASTM F104, Type 1, Class 2, unless otherwise specified.3.1 COMPRESSIBILITY 15 - 25 %(ASTM F 36, 34.5 MPa Load)Recovery, min 40 %3.2 TENSILE STRENGTH, min 10 MPa3.3 IMMERSION IN LIQUIDSTensileThickness Weight StrengthImmersion Test Change, Change, Loss, Fluid
4、Conditions max max max CompressibilityASTM #1 oil 5 h at 150 EC + 5 % + 25 % - -ASTM #3 oil 70 h at 100 EC + 10 % + 30 % - -Water 70 h at 100 EC + 15 % - - -Currently 5 h at 150 EC + 8 % + 30 % - 30 % 0 to + 35 %Approved AutoTrans. FluidENGINEERING MATERIAL SPECIFICATIONESP-M8G163-AWP 3948-b Page 2
5、of 2 3.4 DIMENSIONAL STABILITYTest M ethod: Cut twelve 2.54 x 152.4 cm in the machine (grain)direct ion and twelve in the against-machine (against grain)direction. P recondition samples for 24 h at 50 % R.H. at 23 +/- 2EC . After preconditioning, measure the length of each specimen.Place six specime
6、ns of each direction in a humidity cabinet for 24 hat 95 - 100 % R.H. at 38 +/- 2 EC and six samples in a humiditycab inet at 15 - 20 % R.H. at 38 +/- 2 EC. After 24 h, removespecimens and remeasure length immediately.WMD AMDLength Change after 24 h at 0 to + 0.3 % 0 to + 1.0 %95 - 100 % R.H. at 38
7、+/- 2 ECLength Change after 24 h at - 0.2 to 0 % - 0.2 to 0 %15 - 20 % R.H. at 38 +/- 2 EC3.5 SUPPLIERS RESPONSIBILITYMaterial supplied to this specification must be equivalent to thatoriginally approved. C hanges in formulation or processing shall notbe made without prior approval as described in S
8、upplier Procedure I-A.4. APPROVAL OF SUPPLIERSSupplier s to this specification must be approved by the affected productengineering office. Procedure for gaining approval of a specific materialto a new/existing ES-M specification is contained in Supplier Procedure I-A. Appr oved new suppliers will be added to the Engineering MaterialsApproved Source List.
