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. 2011 by Navistar, Inc. AUGUST 2011 Page 1 of 4 NAVISTAR, INC. TMS (TRUCK MATERIAL SPECIFICATION) NUMBER:
2、TMS- 1026 srr TITLE: Ball Stud, High-Strength, Wear-Resistant CURRENT REV. No.: 1108 DATE: August 2011 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: Rev. D-1 - June 2000 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification
3、 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 regulatory limits prior to us
4、e. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive; added CEMS B-50 requirement for restricted chemical substances; added Section 9.0; editorial changes. Reference: File 02 Keywords: Ball Stud, High-strength Fasteners 1.0 APPLICATION
5、 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, finish, and testing are included in this spec
6、ification. 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 CEMS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards s
7、hall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 NAVISTAR CEMS G-1 NAVISTAR Manufacturing Standard MS-D-13 NAVISTAR CEMS B-50 CFR Title 29, Part 1910 4.0 REQUIREMENTS 4.1 Material and Heat Treatment
8、 Ball 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. Option 2 - Any steel (0.35 to 0.55% carbon, 0.60
9、% min manganese, 0.04% max phosphorus, 0.05% max sulfur), induction or flame hardened on the ball surface. NUMBER: TMS- 1026 Title: Ball Stud, High-Strength, Wear-Resistant REVISION: 1108 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Cor
10、porate Technical Standards. Suppliers are required to assume all patent liability. 2011 by Navistar, Inc. AUGUST 2011 Page 2 of 4 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 ba
11、ll 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 hard
12、ness 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
13、ball 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
14、HRC. 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 cas
15、e 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 Stu
16、ds shall be surface treated after hardening as follows (unless otherwise specified on the drawing): Phosphate Coating (manganese phosphate), Class A-2, CEMS 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 p
17、rovide freedom from hydrogen embrittlement. NUMBER: TMS- 1026 Title: Ball Stud, High-Strength, Wear-Resistant REVISION: 1108 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 al
18、l patent liability. 2011 by Navistar, Inc. AUGUST 2011 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 prod
19、uct supplied shall be clean and free from dirt, oils, sharp edges, or defects harmful to product performance. 6.0 SOURCE APPROVAL AND QUALITY CONTROL 6.1 Supplier Requirements All suppliers to NAVISTAR are required to be registered to ISO 9001 Quality System Requirements. NAVISTAR will also accept T
20、S-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Suppliers must maintain their certification with an accredited registrar and must furnish copies of registration certificates to the Corporate Buyer
21、 upon request. 6.2 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 without approval. In the event that cha
22、nges in material, properties, processing practices, construction, color, or labeling of the product are required, the supplier shall notify Materials Engineering at Truck Development and Technology Center (TDTC) and Purchasing and Supplier Development of the proposed change(s). Test data indicating
23、conformance to all requirements of this specification, test samples, and new or amended or updated Material Safety Data Sheet(s) (MSDS), in accordance with CFR Title 29, Part 1910, shall be submitted with the request for change. 6.3 Process Control The supplier shall either perform and report result
24、s 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 providing all required properties. The part supplier and the plant metallurgist and/or
25、the quality control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific products. 7.0 SHIPPING, PACKING AND IDENTIFICATION Loading, packing and identification shall be in accordance with Manufacturing Std. MS-D-13. 8.0 DESIGNATION ON DRAWINGS Since the ma
26、terials and heat treatments described in this specification are considered interchangeable, it is not necessary to select the method of manufacture. Therefore, the material designation shall read “TMS-1026“ with no reference to type of material, heat treatment, or finish. Or, if a particular materia
27、l/process option is desired, a note can be added to the drawing per the following example: TMS-1026, Option 1 NUMBER: TMS- 1026 Title: Ball Stud, High-Strength, Wear-Resistant REVISION: 1108 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from
28、Corporate Technical Standards. Suppliers are required to assume all patent liability. 2011 by Navistar, Inc. AUGUST 2011 Page 4 of 4 9.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase controlled copies of this spe
29、cification by contacting: Materials Engineering and Technology Dept. Truck Development and Technology Center 2911 Meyer Road Fort Wayne, IN 46803 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/
