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. JANUARY 2018 Page 1 of 8 NAVISTAR, INC. Material, Parts, and Process Specificatio
2、ns (MPAPS) NUMBER: MPAPS A-43 Former Designation: CEMS A-43 TITLE: High Strength Low Alloy (HSLA) Steel Plate/Bar CURRENT REV. No.: 1801 DATE: Jan. 2018 WRITTEN/REVIEWED BY: W. Cook APPROVED BY: R. Goluch SUPERSEDES: MPAPS A-43 - April 2014 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURREN
3、T 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 applicability of
4、regulatory limits prior to use. 1.0 APPLICATION This specification applies to high strength low alloy (HSLA) steel products having 0.25inch (6.35mm) minimum thickness. This includes HSLA plate, flat bar, bar shapes (channels, angles, tees and zees), and structural shapes (shapes with dimensions over
5、 3 inches are classified as structural shapes). Refer to MPAPS A-6, Part I, for HSLA sheet/strip under 0.25 in. (6.35mm) thick. HSLA steels are a class of hot rolled steel having higher mechanical properties than low carbon structural steels. They are generally alloyed with micro additions of niobiu
6、m (Nb) (columbium), vanadium (V), titanium (Ti), nitrogen (N), or combination thereof, in conjunction with controlled rolling temperatures. The lower carbon content improves weldability 2.0 SCOPE This Specification covers Navistars HSLA steel classification system and general requirements for chemis
7、try, mechanical properties. It also includes quality expectations and specifies methods of test. 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 REFEREN
8、CE DOCUMENTS Unless otherwise 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 Supplier Packing and Shipping
9、 Std. D-13 NAVISTAR MPAPS B-50: Restricted Chemical Substances NAVISTAR MPAPS A-6 Part I: Low Carbon Steel, Flat Rolled and Structural Shapes ASTM A6: Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling ASTM A370: Standard Test Methods a
10、nd Definitions for Mechanical Testing of Steel Products ASTM A572: Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel NUMBER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar REVISION: 1801 This document is restricted and may not be sent outside Navistar,
11、Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. JANUARY 2018 Page 2 of 8 ASTM A635: Standard Specification for Steel, Sheet and Strip, Heavy-Thickness Coils, Hot-Rolled, Alloy, Carbon, Structural,
12、 High-Strength Low-Alloy, and High-Strength Low-Alloy with Improved Formability, ASTM A656: Standard Specification for Hot-Rolled Structural Steel, High-Strength Low-Alloy Plate with Improved Formability ASTM A1018: Standard Specification for Steel, Sheet and Strip, Heavy-Thickness Coils, Hot-Rolled
13、, Carbon, Commercial, Drawing, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, and Ultra-High Strength ASTM E208: Standard Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels ASTM E290: Standard Test
14、 Methods for Bend Testing of Material for Ductility SAE J1392: Steel, High Strength, Hot Rolled Sheet and Strip, Cold Rolled Sheet, and Coated Sheet AWS D1.1/D1.1M: Structural Welding Code Steel AWS D1.3/D1.3M: Structural Welding code - Sheet Steel 4.0 CLASSIFICATION These steels are classified on t
15、he basis of yield strength. Suffix letters are used to denote killing practice or to indicate additional requirements affecting steel cleanliness, grain size, and/or inclusion control. 5.0 GENERAL REQUIREMENTS 5.1 Chemical Composition Product supplied to this specification will meet the chemical req
16、uirements as given in Table 1 for the specified Navistar type. The choice of alloys and limits, other than those specified in Table 1, which are necessary to produce the required mechanical properties, will be subject to agreement between the supplier and the Plant Quality Control Manager. 5.2 Mecha
17、nical Properties Required mechanical properties, unless otherwise specified, will be as shown in Table 2. 5.2.1 Impact Test Requirements (Types 50A and 50R Only) Types 50A and 50R steel will meet the specified impact test requirements. See “Methods of Test,” Section 8.0. 5.2.1.1 Charpy V-Notch The r
18、equirements for standard and sub-size Charpy V-Notch specimens are shown in Table 3. The standard size specimen will be used except where the section thickness does not permit machining a 10mm specimen. In such cases, sub-size specimens as listed will be used. The sub-size specimen selected will be
19、as large as the particular section thickness permits. 5.2.1.2 Nil Ductility Transition Temperature (NDTT) Optional Method Type 50R will have a maximum nil ductility transition temperature (NDTT) of -30F (-35C) and for Type 50A, -10F (-23C). This requirement may be used in lieu of the Charpy V-Notch
20、impact requirement for material with section thickness of 0.625 inch (16.0 mm) and greater. 5.2.2 Bending Requirements MPAPS A-43 Appendix provides recommendations for minimum cold bend radii for the various types of materials covered in this specification. If specific formability or bending require
21、ments are needed for a given design, those requirements should be specified on the engineering drawing. 5.3 Material Thickness and Dimensional Tolerances NUMBER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar REVISION: 1801 This document is restricted and may not be sent outside Navistar,
22、Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. JANUARY 2018 Page 3 of 8 The nominal values for preferred thickness and associated tolerances for plate products are shown in Table 4. Preferred thi
23、ckness should be used in all designs and specified on engineering drawings. The tolerances for “soft metric conversion” design (Table 4A) are not the same as the tolerances shown herein for “hard metric” design (Table 4B). The tolerances for each design practice are different and they should not be
24、interchanged. The dimensional tolerances of the basic/general ASTM specification applicable to the type of product will apply unless otherwise specified. 5.4 Welding Grades For parts to be structurally welded per AWS D1.1/D1.1M or D1.3/D1.3M, the recommended ASTM Grades listed in Table 1 should be o
25、rdered to satisfy following Navistar types: 42X, 45X, 50X, 60X, 65X and 70X. All other Navistar Types and the commercially available grades of steels recommended, if welded, must be qualified per Clause 4 in AWS D1.1/D1.1M or D1.3/D1.3M. 6.0 QUALITY All product supplied shall be of uniform compositi
26、on and will be free of defects harmful to fabrication or performance of parts. Products covered by this specification will meet the more general requirements of ASTM A635 or ASTM A6, as applicable. 7.0 METHODS OF TEST 7.1 Tensile Properties Test according to ASTM A370. Machined surfaces of test spec
27、imens will have a roughness not greater than that produced by finish milling 63 microinches (1.6 m) AA, maximum. 7.2 Impact Properties 7.2.1 Charpy V-Notch: Test according to ASTM A370. 7.2.2 Nil Ductility Transition Temperature: Test in accordance with ASTM E 208. 7.3 Bending Properties Test accord
28、ing to ASTM E 290. 8.0 SOURCE APPROVAL AND QUALITY CONTROL 8.1 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 Par
29、t Approval Process) documentation 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. 8.2 Approval Parts supplied against contracts or purchase orders citing th
30、is 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 changes in material, properties, processing practices, construction, color, or labeling of t
31、he product are required, the supplier 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) (
32、MSDS), in accordance with CFR Title 29, Part 1910 shall be submitted with the request for change. NUMBER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar REVISION: 1801 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Tec
33、hnical Standards. Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. JANUARY 2018 Page 4 of 8 8.3 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
34、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 quality control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific products. 9.0 DESIGNA
35、TION ON DRAWINGS AND PURCHASE ORDERS Material designation on engineering drawings will consist of the NAVISTAR Type designation and reference this specification. For example, Steel, Type 42X, MPAPS A-43 Steel, Type 80F, MPAPS A-43 10.0 PACKAGING AND SHIPPING Packing and shipping will be in accordanc
36、e with Navistar Supplier Packing and Shipping standard D-13. 11.0 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 and Technology Dept. 10
37、400 W. North Ave. 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-43 TITLE High Strength Low Alloy Steel Plate/Bar REVISION: 1801 This document is restri
38、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. 2018 by Navistar, Inc. JANUARY 2018 Page 5 of 8 TABLE 1. CHEMICAL REQUIREMENTS (HEAT ANALYSIS) NAVISTAR Type Recommended equival
39、ent ASTM designation % C (max) % Mn (max) % P (max) % S (max) % Si (max) Description 42X A572 Gr 42 0.21 1.35 0.04 0.05 0.40* Killed or semi killed; may be treated with Cb/Nb, V, or N, or combination thereof. 45X A1018 Gr 45 0.15 1.50 0.04 0.04 - 50X A572 Gr 50 0.23 1.35 0.04 0.05 0.40* 60X A572 Gr
40、60 0.26 1.35 0.04 0.05 0.40 65X A 572 Gr 65 0.23 1.65 0.04 0.05 0.40 70X A1018 Gr 70 0.15 1.65 0.04 0.04 - 50A* 50R* 0.23 1.50 0.04 0.05 0.90 Fully killed only, fine grain, may be treated with Cb/Nb, V, N, or other alloying elements 50F 60F 70F 80F A656, Gr 50 A656, Gr 60 A656, Gr 70 A656, Gr 80 0.1
41、8 1.65 0.025 0.035 0.60 Fully killed, improved formability, inclusion controlled, fine ferritic grain size, treated with A1, Cb/Nb, V, Ti, N or combination thereof. 90XF 100XF 110XF A1018, Gr 90 A1018, Gr 100 0.15 0.15 0.12 2.00 2.00 2.10 0.020 0.020 0.025 0.025 0.025 0.010 0.60 Ultra-high strength
42、steels fully killed, fine grain practice, microalloyed with Cb/Nb, Ti, V, Mo, etc. * Applies to plates up to 1.5 in thick, shapes having leg/flange thickness to 3 in, and all bar and bar shapes; for plates over 1.5 in thick and shapes over 3 in bars, silicon range can be 0.15-0.40%. * See footnote 2
43、 in Table 2 below. May also refer to SAE J1392 for requirements of HSLA grades. NUMBER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar REVISION: 1801 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards.
44、Suppliers are required to assume all patent liability. 2018 by Navistar, Inc. JANUARY 2018 Page 6 of 8 TABLE 2. MECHANICAL PROPERTIES Type Recommended equivalent ASTM spec Yield Point or Yield Strength 1) (min) Tensile Strength (min) % Elongation (min) 2 Inch (50 mm) Gage Length 8 Inch (200 mm) Gage
45、 Length ksi MPa ksi MPa HSLA42X A572 Gr 42 42 290 60 415 24 20 45X A1018 Gr 45 45 310 55 380 22 17 50X A572 Gr 50 50 345 65 450 21 18 60X A572 Gr 60 60 415 75 520 18 16 65X4,5,6) A572 Gr 65 65 450 80 550 17 15 70X A1018 Gr 70 70 480 80 550 12 10 Impact Resistant50A2) 50 - 70 345 -485 70 485 20 18 50
46、R 2) 45- 70 310 -485 65 450 20 18 HSLA Improved Formability50F A656 Gr 50 50 345 60 415 23 20 60F A656 Gr 60 60 415 70 485 20 17 70F A656 Gr 70 70 485 80 550 17 14 80F A656 Gr 80 80 550 90 620 15 12 Ultra HighStrength90XF A1018 Gr 90 90 620 100 690 10 8 100XF3) A1018 Gr 100 100 690 110 760 10 8 110X
47、F - 110 760 118 810 15 - HSLA grades as defined in SAE J1392 may also be used to meet the requirements of this specification. 1) Present steel industry practice is to express the yield of these materials as yield point, and determination is by drop of beam, dividers or other method from ASTM A370. U
48、nless otherwise specified, this practice is acceptable for material supplied to this specification, and no extensometer extras are applicable. Values in italics are for yield strength not yield point. 2) These grades are required to meet impact properties as specified in Section 6.2.1. Mechanical properties may be obtained by normalizing, stress relieving, quenching and tempering or other thermal treatments. 3) This type is easily weldable and bendable; designed for thermal cutting only; does n
