1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 06 24 Revised Rev para 4.2 K. Thurgood 2002 07 31 Revised Updated and renumbered 1992 03 31 NB00E10043054172 Released J. Nelson NAAO, N. Riley EAOPrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 2 S
2、TEEL, SHEET, BORON TREATED, HIGH STRENGTH WSB-M1A322-A1 1. SCOPE The material defined by this specification is a fully killed, fine grained high strength boron steel. 2. APPLICATION This specification was released originally for material used in door intrusion beams where a high strength to weight r
3、atio is required. High strength and toughness is obtained during the combined hot forming/die quenching operation, see 4.2. Caution: Due to the hardenability response of this material, individual welding schedules must be developed for each application. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR
4、PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION The percentages given are heat or cast (ladle) analysis: C 0.20 - 0.25 Mn 1.00 - 1.30 P 0.03 max S 0.025 max Si 0.20 - 0.3
5、5 Cr 0.15 - 0.25 B 0.0015 - 0.005 3.3 FORMABILITY The quality level of steel supplied to fabricate a specific component is to be negotiated between the hot forming activity and the steel supplier. Acceptance of subsequent orders by the steel supplier for a given component at the agreed upon quality
6、level implies that all steel supplied will be of a comparable quality level and will form that part satisfactorily as defined by the hot forming activity. 4. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. ENGI
7、NEERING MATERIAL SPECIFICATIONWSB-M1A322-A1Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 2 4.1 INITIAL SUPPLIER APPROVAL For initial approval, the supplier must furnish the following information for each grade. . A plan detailing how each requirement of par
8、a 3 will be controlled on a continuing production basis. . Test results from a typical production sample for the requirements outlined in para 3. Upon approval, the material will be added to the Engineering Material Approved Source List. 4.2 COMPONENT PROPERTIES This material gives rise to high strength and toughness during the combined hot forming/die quenching operation. Typical component properties are as follows: Ultimate Tensile Strength 1500 MPa Yield Strength 1100 MPa Elongation (A5) 9%
