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. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 4 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS- A-1 Former Designation: CEMS A-1 TITLE: Hot Rolled Steel, Carbon And Alloy Bars And Carbon Wire Rods CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: W. Cook APPROVED BY: R. Goluch SUPERSEDES: October 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REV
3、ISION 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 regul
4、atory limits prior to use. Change Notice: Removed dimensional tolerance reference tables; Editorial changes; Combined appendix; MPAPS Formatting 1.0 APPLICATION Hot rolled steel bars have lower cost per pound than cold rolled and cold finished bars. These products can be used economically in many ap
5、plications where limited surface decarburization is acceptable. (See A.0 General Information) 2.0 SCOPE This specification covers requirements for general applications of hot rolled carbon and alloy bars and carbon steel wire rods used in the Companys products. Whenever applicable, the specification
6、 should be used in conjunction with A-0, Part II, Navistar System of Steel Classification. Requirements for hot rolled bars and wire rods not included in this specification are in the following specifications: Low Carbon Steel, Flat Rolled and Structural Shapes MPAPS A-6 Wrought Corrosion and Heat R
7、esisting Steels MPAPS A-37 High Strength-Low Alloy Steels MPAPS A-43 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 otherwis
8、e specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 NAVISTAR Manufacturing Std. MS-D-13 NAVISTAR Engineering Design St
9、d A-16 NAVISTAR MPAPS B-50 NAVISTAR MPAPS A-0, Part I ASTM A29 ASTM A575 ASTM A576 NUMBER: MPAPS A-1 TITLE: Hot Rolled Steel, Carbon And Alloy Bars And Carbon Wire Rods CURRENT ISSUE DATE: June 2015 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permissi
10、on from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 5 4.0 REQUIREMENTS Hot rolled steel bars are classified by chemical composition and by their quality designations. Product supplied shall meet the general requirem
11、ents of ASTM A29. 4.1 Chemical Composition Bars and wire rods purchased to this specification shall conform to the required analysis for the appropriate steel in MPAPS A-0, Part I. 4.2 Dimensional Tolerances Materials purchased to this specification shall conform to dimensional tolerances as per AST
12、M A29. 5.0 QUALITY Carbon steel bars are produced in two fundamental qualities: Merchant Quality (ASTM A575) and Special Quality (ASTM A576). Merchant Quality bars are available in certain compositions at a lower cost than Special Quality bars. However, Merchant Quality bars may contain surface or i
13、nternal defects which may preclude their use in applications involving forging or heat treating. Special Quality bars shall be conditioned as necessary to remove injurious surface defects and shall be free of visible pipe. Carbon steel bars furnished to this specification shall be Special Quality un
14、less otherwise specified. 5.1 Alloy steel bars are made with more than ordinary care throughout their manufacture. Therefore, for most applications, the quality of alloy bars produced to normal mill practice will be acceptable and no quality designation is necessary. Special applications may require
15、 alloy steel bars produced to a specific quality designation such as Axle Shaft Quality or Cold Heading Quality. Alloy steel bars furnished to this specification shall be produced to normal mill practice with no quality extras applicable unless otherwise specified. 5.2 Carbon steel wire rods are sem
16、ifinished products intended primarily for the manufacture of wire. Unless otherwise specified, carbon wire rods furnished to this specification shall be Industrial Quality. 5.3 Qualities for steel bars and wire rods shall be specified on the purchase order. See “Designation on Drawings and Purchase
17、Orders” and Appendix - General Information.” 5.4 See ASTM A-29 for test Methods. 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 have been met. 6.1 Q
18、uality 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 included in the plan as
19、 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 A-16 NUMBER: MPAPS A-1 TITLE: Hot Rolled Steel, Carbon And Alloy Bars And
20、Carbon Wire Rods CURRENT ISSUE DATE: June 2015 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. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 5 7.0 SOURCE AP
21、PROVAL AND QUALITY CONTROL 7.1 Supplier Requirements All suppliers to NAVISTAR are required to be registered to ISO 9001 Quality System Requirements. NAVISTAR will also accept TS-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentatio
22、n and approval requirements. Suppliers must maintain their certification with an accredited registrar and must furnish copies of registration certificates to their Corporate Buyer upon request. 7.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equiva
23、lent 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 labeling of the product are required, the sup
24、plier shall notify NAVISTAR Materials Engineering and Purchasing and Supplier Development of the proposed change(s). Test data indicating 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 Ti
25、tle 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 9001 or TS-16949 guidelines, or provide statistical evidence of the lot having been produced in a state of
26、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 reporting requirements on specific products. 8.0 SHIPPING AND HANDLING Shipping and identification shall be in
27、accordance with NAVISTAR Manufacturing Standard MS-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 AND PURCHASE ORDERS 9.1 Drawings In specifying hot rolled steels on engineering drawings, it is desirable to a
28、llow as many options as possible at the manufacturing level and still insure proper engineering performance. This is the purpose of the system of coding steels covered in MPAPS A-0, Part II. 9.1.1 Since either a code from A-0, Part II, or a specific grade from A-0, Part I, may be specified on the dr
29、awing, there is ordinarily no need to make a drawing reference to A-1. 9.1.2 0-XXX codes, Table I, A-0, Part II, are to be selected in all cases where either hot rolled or cold drawn steel may be used, and the minimum mechanical properties listed are adequate. In case of critical parts where the fre
30、edom of the coding system cannot be allowed, or where codes covering the proper material do not yet appear in A-0, Part II, steel shall be specified by steel grade and reference to this specification. NUMBER: MPAPS A-1 TITLE: Hot Rolled Steel, Carbon And Alloy Bars And Carbon Wire Rods CURRENT ISSUE
31、 DATE: June 2015 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. 2015 by Navistar, Inc. JUNE 2015 Page 4 of 5 9.2 Purchase Orders Material designation on
32、 purchase orders shall consist of one of the appropriate grades and any special requirements necessary for proper fabrication of the part. See “Appendix - General Information.” Examples: Bar, M 1010, Merchant Quality, MPAPS A-1 Bar, 1025, Pickled and Oiled, MPAPS A-1 Bar, 8645 H, Axle Shaft Quality,
33、 Hardenability: J 56 - 63 1/16; J 50 = 6 - 16, MPAPS A-1 Wire Rod, 1010, MPAPS A-1 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 Engineering a
34、nd Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 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:/ A.0 GENERAL INFORMATION (Not a Requirement) A.1 Introduction Hot rolled carbon
35、steel bars and rods have the lowest cost per pound of any steel bars and can be used economically in many applications. They have good formability, weldability and machinability in certain grades. These properties decrease with increasing carbon content which limits use of unannealed bars and rods t
36、o the low and medium carbon grades. Alloy steel bars have limited usage in the as-hot rolled condition, since the full value of alloy steel is realized only by heat treatment. A.2 Quality Hot rolled carbon steel bars are available in two fundamental qualities: A.2.1 Merchant Quality These bars are p
37、roduced from rimmed, capped or semikilled steel and may not be restricted in any way. This quality will normally contain seams and surface defects but is suitable for non-critical applications involving mild cold bending, mild hot forming, punching and welding. A.2.2. Special Quality These bars are
38、manufactured in such a manner as to minimize injurious internal defects and surface imperfections. Special Quality bars are intended for applications involving forging, heat treating; cold drawing, turning, and other special processes. Some specific applications require a unique quality designation
39、beyond Special Quality as an aid to the manufacture of acceptable parts. These additional designations are: a. Scrapless Nut Quality b. Axle shaft Quality c. Cold Extrusion Quality d. Cold Heading or Cold Forging Quality NUMBER: MPAPS A-1 TITLE: Hot Rolled Steel, Carbon And Alloy Bars And Carbon Wir
40、e Rods CURRENT ISSUE DATE: June 2015 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. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 5 A.2.3 Hot rolled alloy
41、steel bars are available for: A.2.3.1 General applications which do not require a quality designation. A.2.3.2 Specific applications which may require one of the following designations: a. Aircraft Quality or Steel Subject to Magnetic Particle Inspection b. Axle Shaft Quality c. Bearing Quality d. C
42、old Heading Quality e. Special Cold Heading Quality f. Rifle Barrel Quality, Gun Quality, Shell Quality and A.P. (Armor Piercing) Quality A.3 Restrictive Requirements Carbon steel bars are sometimes used for special applications where restrictive requirements over and above Special Quality are neces
43、sary. These requirements include: special heat treating, macroetch test, fracture test, nonmetallic inclusion test, restrictive chemistry, special discard, special surface, restricted decarburization limits. Additional special controls are necessary to meet more than one of these requirements and cumulative restrictions may be conflicting or technologically impractical. A.4 Decarburization All hot rolled bars have decarburization at the surface unless removed by machining operations. Decarburization reduces hardness, wear resistance, fatigue strength and causes poor heat treating response.
