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. 2016 by Navistar, Inc. NOVEMBER 2016 Page 1 of 12 NAVISTAR, INC. Material, Parts, and Process Specificat
2、ions (MPAPS) NUMBER: MPAPS A-0 PART II Former Designation: CEMS A-0 Part II TITLE: System of Steel Classification for Standard Steels CURRENT REV No.: 1611 DATE: Nov. 2016 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: Rev. 1408 August 2014 PRINTED COPIES OF THIS DOCUMENT MUST
3、BE VERIFIED FOR CURRENT REVISION 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
4、 the applicability of regulatory limits prior to use. 1.0 APPLICATION This specification describes a system of steel classification which allows for specifying steels on engineering drawings by codes which have or can produce the desired mechanical properties. The classification system will: Reduce
5、the number of steels used within the company be permitting standardization of steels. Allow suppliers the freedom to select steels consistent with maintaining the desired mechanical properties Allow suppliers to use equivalent steels without having to obtain additional approval. For flat rolled shee
6、t, strip and plate, structural products, and tubing, it is recommended that MPAPS A-6, A-10, A-43, A-44, or other applicable specifications be used. 2.0 SCOPE MPAPS A-0 consists of three major sections: Part I Chemical Composition of Standard Steels Part II System of Steel Classification for Standar
7、d Steels Part III Classification System for Heat Treated Steels This part of the specification defines a system of steel classification. Wherever practicable, this classification system is to be used on engineering drawings throughout the Company. In general, this specification is intended for non-h
8、eat-treated applications. Refer to Section A.0 - General Information at the end of this document for mechanical property tables listing expected minimum tensile properties for carbon steel grades and nominal tensile properties for alloy steel grades. 2.1 Restricted Chemical Substances Effective Janu
9、ary 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, Standards, and Re
10、gulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 NAVISTAR Engineering Design Std A-16 CFR Title 29, Part 1910 NAVISTAR MPAPS B-50 NAVISTAR Supplier Packing and Shipping Std-D-13 ASTM A370 NUMBER: MPAPS A-0 PART II TITLE: System of Steel Classification for
11、Standard Steels REVISION: 1611 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. 2016 by Navistar, Inc. NOVEMBER 2016 Page 2 of 12 4.0 REQUIREMENTS 4.1 Cla
12、ssification The Navistar codes used for identification of classes will be composed of digits as described in the sections below. 4.2 Breakdown of Navistar Code Identification 1st Position Dash 2nd Position 3rd Position 1 digit - 1 digit 2 digits Refers to Steel Section of Navistar Material Specifica
13、tions. Example: 0 for A-0 2 for A-2 Dash always follows 1st position. Approximate carbon content. Example: 2 is in the 0.20% carbon range: 4 is in the 0.40% carbon range 00 thru 49 indicates carbon steel. These numbers are chosen arbitrarily and have no significance except as indicated, 15 indicates
14、 free machining steel EXAMPLE CODE: 0-201 0 - 2 01 MEANING: Steel Section MPAPS A-0 Approximately 0.20% Carbon A Carbon Steel Class Case Hardening (formerly designated as a 4th position in the Navistar code as a “C” or “N”). For applications which require case hardening, requirements will be specifi
15、ed on the engineering drawing per MPAPS A-40, along with the material requirement using the applicable steel code per this specification. Use of fully killed, fine grain steel is required, and sulfur is limited to 0.013% max. Welding Applications (formerly designated as a 4th position in the Navista
16、r code as a “W”). For applications requiring welding, steels having 0.25% carbon or less are recommended. As the level of carbon in the steel increases, the weldability of the steel decreases, and special precautions may be necessary to insure sound welds. When welding of cold worked steels (Table 2
17、) is required, it should be noted that the minimum mechanical properties specified are obtained by cold work and will not be maintained in the welded area. If the weld area is in a critically stressed zone, refer to hot rolled minimum strength in Table 1 for property estimate. 4.3 The classification
18、 tables have 5 major headings as follows: 4.3.1 Column One: Navistar Code Each Navistar code used on an engineering drawing must have the same meaning throughout the Corporation. Therefore, the exact degree of freedom permitted at the manufacturing level is defined precisely in the table. 4.3.2 Colu
19、mn Two: Description of Class The explanation in this column covers the general engineering requirements of the Navistar code. NUMBER: MPAPS A-0 PART II TITLE: System of Steel Classification for Standard Steels REVISION: 1611 This document is restricted and may not be sent outside Navistar, Inc. or r
20、eproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. NOVEMBER 2016 Page 3 of 12 4.3.3 Column Three: Minimum Expected Yield Strength The minimum expected yield strength (for the non-heat treated condition) is th
21、at of the lowest strength steel included in the Navistar code. This data is a guide for the engineer in the selection of a class to meet specific mechanical requirements. 4.3.4 Column Four: Recommended Steels The steels shown in this column cover the steels recommended by materials engineering and a
22、re grouped on the basis of yield strength. The Navistar code, not the actual steel, should be shown on the engineering drawing. 4.3.5 Column Five: Allowable Alternates Allowable alternate materials for the carbon steel grades may be used with permission of the Quality Control Manager of the purchasi
23、ng plant. These alternates must meet the minimum tensile properties and the restrictions of the code specified. When transverse properties or splitting strength are involved, sulfur and phosphorus will be restricted to the maximum of those of the recommended steels of the specified code. 4.3.6 Choic
24、e of Table 4.3.6.1 Table 1 should be used in all cases where the condition of the steel (e.g., hot rolled, cold finished or semi-finished) is optional and the minimum mechanical properties therein indicated are adequate. 4.3.6.2 Table 2 should be used only where higher mechanical properties, surface
25、 conditions, or other engineering considerations require the use of cold drawn steel only. Table 2 should not be used to obtain dimensional tolerances only. Where dimensional tolerance of cold drawn steel is desired and satisfactory mechanical properties can be met by a code in Table 1, this code sh
26、ould be used and dimensional tolerances placed on the drawing. This will allow the use of hot rolled, turned, or turned and polished steel, provided the dimensions are adhered to. 4.3.6.3 Table 3 should be used only where special high tensile steels are required. 4.4 Strand Cast Steel Restriction St
27、rand Cast (SC) (i.e., continuous cast) steel shall not be applied for critical parts except when produced by an approved SC steel source. Critical parts are those that 1) require heat treatment, 2) are fabricated from fine grained, fully killed micro-alloyed high-strength low-alloy (HSLA) steels, or
28、 3) require refined manufacturing techniques indicative of high quality parts for critical applications. Approval of the strand cast steel source and a definition of the scope of the approval must be obtained prior to the purchase of steel. Contact Materials Engineering for information on the strand
29、 cast approval process. NUMBER: MPAPS A-0 PART II TITLE: System of Steel Classification for Standard Steels REVISION: 1611 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
30、patent liability. 2016 by Navistar, Inc. NOVEMBER 2016 Page 4 of 12 5.0 QUALITY 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 Qu
31、ality 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
32、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 7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 Supplier Requirements All
33、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) documentation and approval requirements. Suppliers must maintain thei
34、r 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 equivalent in all respects to those samples which were approved
35、 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 supplier shall notify NAVISTAR Materials Engineering and Pur
36、chasing 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 Title 29, Part 1910 shall be submitted with the request for
37、 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 statistical control and with a process capable of provid
38、ing 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. NUMBER: MPAPS A-0 PART II TITLE: System of Steel Classification for Standard Steels REVISION: 1611 This document is restri
39、cted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. NOVEMBER 2016 Page 5 of 12 8.0 SHIPPING AND HANDLING Shipping and identification shall be in accordance w
40、ith 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 ON DRAWINGS Example of note to use on drawings: STEEL, 0-201, MPAPS A-0, PART II STEEL, 2-410, MPAPS A-0, PART II 9.1 Ord
41、ering Steel by Navistar Classification The successful operation of this classification system depends upon, first, the selection of a code which will guarantee satisfactory engineering performances, and, second, the selection of a single steel from within this code which will best respond to all man
42、ufacturing operations, such as forging, machining, welding, and case hardening. In order to effect Company-wide standardization of materials, steel should be selected from the “Recommended Steels” column within the code whenever practicable. 9.1.1 The part manufacturer, in ordering the steel, will m
43、ake the selection of individual steel, after consulting the various departments involved, from the standpoint of cost, inventory, processing, etc., to determine which steel within the code can be used to best advantage. The drawings and engineering specifications for individual parts should show onl
44、y the code. 9.1.2 The part manufacturer is responsible for specifying the steel to be purchased. The purchase order must reference the specific steel grades defined in MPAPS A-0 Part I. In no case should other steels be substituted without the approval of Navistar supplier quality, as different type
45、s of steel, even though satisfactory from the engineering performance standpoint, may respond differently to the manufacturing operations. 10.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase controlled copies of t
46、his 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:/ NUMBER: MPAPS A-0 PART
47、II TITLE: System of Steel Classification for Standard Steels REVISION: 1611 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. 2016 by Navistar, Inc. NOVEMB
48、ER 2016 Page 6 of 12 TABLE 1 - STANDARD STEELS - CONDITION OPTIONAL HOT ROLLED, COLD FINISHED OR SEM-FINISHED Steel Code Description Of Class Minimum Expected Yield Strength* ksi (MPa) Recommended Steels * Allowable Alternates * SAE Steel Grade UNS No. 0-100 High ductility 24 (165) 1008 1010 G10080
49、G10100 Any carbon steel meeting min. yield strength, providing sufficient formability; 0.25%C max 0-115 Extra free Machining (transverse & splitting strength reduced by sulfur and phosphorus) 27 (186) 1213 1117 12L14 G12130 G11170 G12144 Any carbon steel meeting min yield strength, with 0.25% C max 0-201(1) General purpose. Average splitting strength. Transverse strength reduced by sulfur. 27 (186) 1015 1018 1020 1022 1023 1025 111
