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. 2017 by Navistar, Inc. APRIL 2017 Page 1 of 12 NAVISTAR, INC. Material, Parts, and Process Specification
2、s (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.: 1704 DATE: Apr. 2017 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: Rev. 1611 Nov. 2016 PRINTED COPIES OF THIS DOCUMENT MUST BE VE
3、RIFIED 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 the
4、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 the n
5、umber 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 sheet, st
6、rip 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 Standard Ste
7、els 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-heat-t
8、reated 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 January 1
9、, 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 Regulat
10、ions 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 Stand
11、ard Steels REVISION: 1704 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. 2017 by Navistar, Inc. APRIL 2017 Page 2 of 12 4.0 REQUIREMENTS 4.1 Classificat
12、ion 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 Specifications. E
13、xample: 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 free ma
14、chining 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 specified on th
15、e 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. Welding Applications (formerly designated as a 4th position in the Navistar code as a “W”). For applications requiring
16、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) is required, it should be noted that the mi
17、nimum 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 tables have 5 major headings as follows: 4.3
18、.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 Column Two: Description of Class The explanation
19、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: 1704 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate T
20、echnical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. APRIL 2017 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 that of the lowest strength steel included in the
21、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 are grouped on the basis of yield strength. The N
22、avistar 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 purchasing plant. These alternates must meet the minimum
23、 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 Choice of Table 4.3.6.1 Table 1 should be used in all
24、 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 conditions, or other engineering considerations
25、 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 should be used and dimensional tolerances placed o
26、n 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 Strand Cast (SC) (i.e., continuous cast) steel sha
27、ll 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 3) require refined manufacturing techniques ind
28、icative 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 cast approval process. NUMBER: MPAPS A-0 PART I
29、I TITLE: System of Steel Classification for Standard Steels REVISION: 1704 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. 2017 by Navistar, Inc. APRIL 2
30、017 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 Quality Control Plan A Quality Control Plan for produ
31、cts 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 features for management by statistical process cont
32、rol.* * 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 suppliers to NAVISTAR are required to be registered
33、 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 their certification with an accredited registrar and mu
34、st 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 by the purchaser. No changes in formulation or pro
35、cessing 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 Purchasing and Supplier Development of the proposed ch
36、ange(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 change. 7.3 Process Control The supplier shall eit
37、her, 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 providing all required properties. The part supplier and
38、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: 1704 This document is restricted and may not be sent outside Navistar, Inc. or
39、reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. APRIL 2017 Page 5 of 12 8.0 SHIPPING AND HANDLING Shipping and identification shall be in accordance with NAVISTAR Supplier Packing and Shipping Standard D-
40、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 Ordering Steel by Navistar Classification The successful
41、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 manufacturing operations, such as forging, machining, wel
42、ding, 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 make the selection of individual steel, after consultin
43、g 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 only the code. 9.1.2 The part manufacturer is responsible
44、 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 types of steel, even though satisfactory from the engineer
45、ing 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 this specification by contacting: Materials Engineering
46、 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 II TITLE: System of Steel Classification for Standard
47、Steels REVISION: 1704 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. 2017 by Navistar, Inc. APRIL 2017 Page 6 of 12 TABLE 1 - STANDARD STEELS - CONDITIO
48、N 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 G10100 Any carbon steel meeting min. yield strength, prov
49、iding 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. - 1015 1018 1020 1022 1023 1025 1117 G10150 G10180 G10200 G10220 G10230 G10250 G11170 Any carbon s
