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. FEBRUARY 2018 Page 1 of 4 NAVISTAR, INC. Material, Parts, and Process Specificati
2、ons (MPAPS) NUMBER: MPAPS A-1026 Former Designation: TMS-1026 TITLE: Ball Stud, High-Strength, Wear-Resistant CURRENT REV No.: 1802 DATE: Feb. 2018 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: Rev. 1108 June 2000 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT RE
3、VISION This specification may involve 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 regu
4、latory limits prior to use. 1.0 APPLICATION This specification applies to ball studs used in steering systems and similar applications requiring high strength and wear resistance (e.g., transmission control rod ball stud). 2.0 SCOPE Requirements for material, heat treatment, hardness, case depth, fi
5、nish, and testing are included in this specification. 2.1 Restricted Chemical Substances 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, th
6、e latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. ISO 9001/TS 16949 Quality Management Systems- Requirements CFR Title 29, Part 1910 Occupational Safety and Health Standards NAVISTAR ISQ-001-QM Integ
7、rated Suppler Quality Requirements NAVISTAR D-13 Supplier Packing and Shipping Standard. NAVISTAR EDS-A16 Key Control Characteristics (KCC) NAVISTAR MPAPS B-50 Restricted Chemical Substances NAVISTAR MPAPS G-1 Phosphate Coatings on Iron and Steel 4.0 REQUIREMENTS 4.1 Material and Heat Treatment Ball
8、 studs shall be made from either of the following combinations of steel (leaded steels are permissible) and heat treatment: Option 1 - Any alloy steel (0.25% carbon max), carburized or carbonitrided on the ball surface. Temper at 200C (400F) min. NUMBER: MPAPS A-1026 TITLE: Ball Stud, High-Strength,
9、 Wear-Resistant REVISION: 1802 This document is 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. FEBRUARY 2018 Page 2 of 4 Option 2 - Any steel (0.35
10、 to 0.55% carbon, 0.60% min manganese, 0.04% max phosphorus, 0.05% max sulfur), induction or flame hardened on the ball surface. 4.2 Hardness The ball surface (spherical diameter) shall have a minimum superficial Rockwell hardness of 88 HR15N (or 55 HRC min when converted). The center 1/3 of the bal
11、l diameter shall not exceed 35 HRC. 4.2.1 The remainder of the ball stud (neck, taper, flange, and threaded or riveted length) shall have a surface hardness of 22-35 HRC. Prior to induction or flame hardening, this hardness shall be obtained by quenching and tempering at 425C (800 F) min. This hardn
12、ess range shall extend from the minor diameter of the neck to at least 3 mm (1/8 in) on the ball side (measured in a direction perpendicular to the stud axis), to a maximum of 6 mm (1/4 in). See Figure 1 below. Figure 1 - Typical Hardening Pattern NOTE: Hardness on Surface A is optional. 4.2.2 For b
13、all studs with a neck diameter of 22 mm (7/8 in) or larger, the hardening pattern may extend to the start of the taper or flange. If hardened in this manner, the pattern shall extend past the minor diameter of the neck by at least 6 mm (1/4 in). The surface hardness of the neck shall not exceed 62 H
14、RC. 4.3 Case Depth The effective case depth (i.e., to 50 HRC) on the finished ball surface shall be 0.25 mm (0.010 in) min whether obtained by carburizing, carbonitriding, or flame or induction hardening. 4.3.1 A case is not desired on the remainder of the ball stud as defined above. However, a case
15、 is permitted on the non-spherical portion providing it is tempered so that it meets the bend test requirements herein and the hardness requirements previously specified. In the case of riveted studs, the riveted end is to be tempered at 650C (1200F) min to permit peening of the end. 4.4 Finish Stud
16、s shall be surface treated after hardening as follows (unless otherwise specified on the drawing): Manganese Phosphate Coating , Type M-2, MPAPS G-1 4.4.1 Electroplating of ball studs is not recommended. However, if ball studs are plated, they shall be suitably treated after plating to provide freed
17、om from hydrogen embrittlement. NUMBER: MPAPS A-1026 TITLE: Ball Stud, High-Strength, Wear-Resistant REVISION: 1802 This document is 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 l
18、iability. 2018 by Navistar, Inc. FEBRUARY 2018 Page 3 of 4 4.5 Testing All studs with neck diameter less than 22 mm (7/8 in) shall exhibit a tough ductile structure and, when bent under an impact loading, shall permanently deform at the neck without cracking or fracture. 5.0 QUALITY All product supp
19、lied shall be clean and free from dirt, oils, sharp edges, or defects harmful to product performance. 6.0 QUALIFICATION 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
20、 have been met. 6.1 Quality Control Plan A Quality Control Plan for products supplied to the requirements of 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 in
21、cluded in the plan as features for management by statistical process control.* * Other characteristics for 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 S
22、upplier Requirements All suppliers to NAVISTAR are subject to the requirements defined in ISQ-001-QM- NAVISTAR Integrated Supplier Quality Requirements. Suppliers must be compliant with ISO 9001 or TS 16949 and fulfill all AIAG PPAP (Production Part Approval Process) documentation and all approval r
23、equirements as indicated in NAVISTAR ISQ-001-QM. 7.2 Approval Parts supplied against contracts or purchase orders 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 witho
24、ut approval. In the event that changes in material, properties, processing practices, construction, color, or labeling 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 representat
25、ive or sending an email to ISQ. Test data indicating conformance to all requirements of this specification, test 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 NUMBER: MPAPS A-
26、1026 TITLE: Ball Stud, High-Strength, Wear-Resistant REVISION: 1802 This document is 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. FEBRUARY 2018 P
27、age 4 of 4 7.3 Process Control The supplier shall either, perform and report results of tests on specific lots of parts produced using ISO 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 prov
28、iding all required properties. The part supplier and the quality control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific products. 8.0 SHIPPING AND HANDLING Shipping and identification shall be in accordance with NAVISTAR Supplier Packing and Shipping
29、 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 ON DRAWINGS Example of note to use on drawings: MPAPS A-1026, Option 1 10.0 TECHNICAL INFORMATION For further information related to the technical content of this
30、specification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering 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:/ A.0 GENERAL INFORMATION REVISION HISTORY Revision Level Change Approved by Date Approved 1802 Converted to MPAPS Format R. Goluch 2/13/2017
