1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 09 18 Revised Para 3.0 inserted; para 3.1, 3.6 and 4 deleted 1989 05 26 RD885100-249 Released C. F. Carter, CCD, NAAO, J. P. Lines, EAO Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 2 ALUMINUM BR
2、AZING SHEET - BRAZE ALLOY CLAD WSH-M2A144-A 1. SCOPE The material defined by this specification is an aluminum sheet clad with brazing alloy on one or both sides. 2. APPLICATION This material was released originally for fabrication of core tubes in flux brazed automotive heaters when clad on one sid
3、e, or headers/tanks/baffles for flux brazed aluminum heaters when clad on both sides. 3. REQUIREMENTS 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). 3.2 CHEMICAL CO
4、MPOSITION PERCENTAGE (weight percent) 3.2.1 Core Composition The upper and lower limits of each controlled element must be established by the suppliers and presented prior to source approval. Samples submitted for approval shall represent this established chemistry. Upon successful testing of the su
5、bmitted sample to all requirements of this specification, the allowable chemical composition range will be detailed on the Engineering Materials Approved Source List. No changes in chemical composition range shall be made without prior approval by Ford Motor Company. 3.2.2 Braze Cladding Composition
6、 (See Sec. 5) Silicon 9.2 - 10.4 Iron 0.5 max Copper 0.10 max Magnesium 0.05 max Manganese 0.05 max Zinc 0.10 max Each Other Element 0.05 max Total Other Elements 0.15 max Aluminum Balance ENGINEERING MATERIAL SPECIFICATIONWSH-M2A144-APrinted copies are uncontrolled Copyright 2003, Ford Global Techn
7、ologies, Inc. Page 2 of 2 3.3 BRAZE CLAD THICKNESS Percent of total material thickness as specified on the engineering drawing: Both Sides Clad One Side Clad (i.e.-headers, tanks, baffles) (i.e.-tubes) 7.5 +/- 1.5% 10 +/- 2% 3.4 MECHANICAL PROPERTIES (Material as Supplied) (ASTM B 557M) O Temper (i.
8、e.-headers, H-14 Temper* tanks, baffles) (i.e.-tubes) Ultimate Tensile Strength 117 - 165 MPa 165 - 215 MPa Yield Strength, min 45 MPa 145 MPa Elongation, min 20% 1% *Note: These properties apply only to material thicknesses from 0.20 - 0.63 mm. 3.5 GRAIN SIZE (Material as Supplied) 3.5 or finer (AS
9、TM E 112) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. The chemical composition values as approved per section 3.2.2 are mandatory, however, suppliers should aim to meet the desired target value of 9.8 for silicon. This target value gives rise to optimum conditions.
