1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. APRIL 2018 Page 1 of 4 NAVISTAR, INC. Material, Parts, and Process Specifications
2、 (MPAPS) NUMBER: MPAPS A-1055 Former Designation: TMS-1055 TITLE: Spring Pins CURRENT REV No.: 1804 DATE: Apr. 2018 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: Rev. 1004 April 2010 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may i
3、nvolve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. 1.0
4、 APPLICATION This specification covers steel bar, case hardened to produce a strong, wear resistant shaft suitable for use as a pin in a suspension spring system. 2.0 SCOPE This specification covers the requirements for material, heat treatment, and microstructure. 2.1 Restricted Chemical Substances
5、 Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following Specifications, St
6、andards, and Regulations are referenced in this specification. ISO 9001/TS 16949 Quality Management Systems- Requirements CFR Title 29, Part 1910 Occupational Health and Safety Standards NAVISTAR ISQ-001-QM Integrated Suppler Quality Requirements NAVISTAR D-13 Supplier Packing and Shipping Standard.
7、 NAVISTAR EDS-A16 Key Control Characteristics (KCC) NAVISTAR MPAPS B-50 Restricted Chemical Substances NAVISTAR MPAPS A-0, Part I Chemical Composition of Standard Steels Part I NAVISTAR MPAPS A-40 Case Hardened Ferrous Materials NAVISTAR MPAPS A-52 Classification of Grinding Microstructural Alterati
8、ons 4.0 REQUIREMENTS 4.1 Material Steel supplied must meet minimum cleanliness requirements for Quality Level I as per MPAPS A-0, Part I, and shall be fully killed, fine grain steel. Steel selection is dependent upon part diameter and heat treat practice and is frequently affected by availability co
9、nsiderations. Care must be taken to assure that the material selected is capable of meeting all the requirements of this specification in the heat-treated condition. NUMBER: MPAPS A-1055 TITLE: Spring Pins REVISION: 1804 This document is restricted and may not be sent outside Navistar, Inc. or repro
10、duced without permission from IPD Technical Standards Team. Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. APRIL 2018 Page 2 of 4 4.1.1 Strand Cast Steel Approval Strand casting is a more efficient and economical production practice and often provides a product with su
11、perior properties as compared to ingot cast steels. However, strand cast product available today is produced using a variety of casting equipment, steel practices, and reduction ratios, and the quality of the product is not consistent. For this reason, the use of strand cast steel is restricted. Str
12、and cast steel sources must be approved by Materials Engineering, , prior to use. 4.2 Heat Treatment Parts shall be case hardened and tempered to a surface hardness of Rockwell 57-63 HRC. Minimum tempering temperature shall be 325F (163C). Effective case depth (on the fully machined part) shall be 0
13、.50-1.25 mm (0.022-0.048 in) measured, after tempering, to a Rockwell hardness of 50 HRC (Navistar Class 30-35 per MPAPS A-40, Section A). 4.3 Microstructure Microstructure of the case shall consist essentially of martensite and austenite and shall meet the limitations on carbides, intergranular oxi
14、des and bainite as per MPAPS A-40, Section A. 4.4 Grinding Quality The surface of the ground pin shall exhibit a Class A or Class B quality level as per MPAPS A-52. 5.0 QUALITY All product supplied shall be clean and free from dirt, oils, sharp edges, or defects harmful to product performance. 6.0 Q
15、UALIFICATION Engineering qualification of sources is required in advance of production shipments. Samples shall be accompanied by test data certifying that all requirements of the specification have been met. 6.1 Quality Control Plan A Quality Control Plan for products supplied to the requirements o
16、f this specification will be established by mutual agreement between NAVISTAR and the supplier. Unless specific exception is noted, the following characteristics, where applicable*, shall be included in the plan as features for management by statistical process control.* * Other characteristics for
17、inclusion in the control plan may be specified on the engineering drawing and/or purchase order. * See NAVISTAR Engineering Design Standard EDS-A16 7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 Supplier Requirements All suppliers to NAVISTAR are subject to the requirements defined in ISQ-001-QM- NAVIS
18、TAR Integrated Supplier Quality Requirements. Suppliers must be compliant with ISO 9001 or TS 16949 NUMBER: MPAPS A-1055 TITLE: Spring Pins REVISION: 1804 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from IPD Technical Standards Team. Suppli
19、ers are required to assume all patent liability. 2018 by Navistar, Inc. APRIL 2018 Page 3 of 4 and fulfill all AIAG PPAP (Production Part Approval Process) documentation and all approval requirements as indicated in NAVISTAR ISQ-001-QM. 7.2 Approval Parts supplied against contracts or purchase order
20、s citing this specification shall be equivalent in all respects to those samples which were approved by the purchaser. No changes in formulation or processing practices are permitted without approval. In the event that changes in material, properties, processing practices, construction, color, or la
21、beling of the product are required, the supplier shall notify NAVISTAR Integrated Supplier Quality (ISQ) of the proposed change(s) by contacting their Navistar Supplier Quality representative or sending an email to ISQ. Test data indicating conformance to all requirements of this specification, test
22、 samples, and new or amended or updated SDS Safety Data Sheet(s) (formerly MSDS) in accordance with CFR Title 29, Part 1910, shall be submitted with the request for change. 7.3 Process Control The supplier shall either, perform and report results of tests on specific lots of parts produced using ISO
23、 9001 or TS-16949 guidelines, or provide statistical evidence of the lot having been produced in a state of statistical control and with a process capable of providing all required properties. The part supplier and the quality control manager of the using NAVISTAR plant may determine testing and rep
24、orting requirements on specific products. 8.0 SHIPPING AND HANDLING Shipping and identification shall be in accordance with NAVISTAR Supplier Packing and Shipping Standard D-13. Parts shall be packaged so as to avoid any damage in shipment detrimental to the appearance of the part. 9.0 DESIGNATION O
25、N DRAWINGS Example of note to use on drawings: Material and Heat Treatment per MPAPS A-1055 10.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engi
26、neering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Markit Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/ NUMBER: MPAPS A-1055 TITLE: Spring Pins REVISION: 1804 This document i
27、s restricted and may not be sent outside Navistar, Inc. or reproduced without permission from IPD Technical Standards Team. Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. APRIL 2018 Page 4 of 4 A.0 GENERAL INFORMATION Following is a partial list of standard steels with
28、 sufficient hardenability to meet case depth and microstructural requirements: 5120H, PS65H, PS59H, PS16H, 8620H, 4320H, PS64H, PS15H, 8622H, PS19H, 8720H, 4621H, 8822H, 4820H. However, any other steel, including plain carbon steels, if quench severity is sufficient, may be used to produce the part providing that all requirements of this specification are met. REVISION HISTORY Revision Level Change Approved by Date Approved 1804 Converted to MPAPS Format R. Goluch 5/7/2018
