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. APRIL 2016 Page 1 of 8 NAVISTAR, INC. Material, Parts, and Process Specifications
2、(MPAPS) NUMBER: MPAPS A-43 Former Designation: CEMS A-43 TITLE: High Strength Low Alloy (HSLA) Steel Plate/Bar CURRENT REV. No.: 1604 DATE: April 2016 WRITTEN/REVIEWED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: MPAPS A-43 - April 2014 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR C
3、URRENT 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 applicabilit
4、y of regulatory limits prior to use. Change Notice: Added note 5 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 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
5、 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 0.18 1.65 0.025 0.035 0.60 Fully killed, improved formability, inclusion controlled, fi
6、ne 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 steels fully killed, fine grain practice, microalloyed with Cb/Nb, Ti, V, Mo, etc. *
7、 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 in Table 2 below. May also refer to SAE J1392 for requirements of HSLA grades. NUMB
8、ER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar CURRENT ISSUE DATE: April 2016 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 Navis
9、tar, Inc. APRIL 2016 Page 6 of 8 TABLE 2. MECHANICAL PROPERTIES Type Approximate 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 Length ksi MPa ksi MPa HSLA42X A572 Gr 42 42 290 60 415 24 20 45X A10
10、18 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 50R 2) 45- 70 310 -485 65 450 20 18 HSLA Improved Formability50F A656 Gr
11、 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 110XF - 110 760 118 810 15 - HSLA grades as defined in SAE J1392 may also
12、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. Unless otherwise specified, this practice is acceptable for material su
13、pplied 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 a
14、nd tempering or other thermal treatments. 3) This type is easily weldable and bendable; designed for thermal cutting only; does not tolerate shear cutting. 4) Type 65X may be specified or ordered as Type 65XF when improved formability is required (e.g., 5th wheel angles). 5) When HSLA steel bars are
15、 specified, replace the “X” suffix with “F” (e.g. 65F) 6) ASTM A675 alloy Grade 65 is similar to alloy 65F. ASTM A675 alloy Grade 65 may be substituted for alloy 65F as required. NUMBER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar CURRENT ISSUE DATE: April 2016 This document is restrict
16、ed 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. APRIL 2016 Page 7 of 8 TABLE 3. CHARPY V-NOTCH IMPACT TEST REQUIREMENTS Type of Specimen Specimen Size, mm
17、Test Temperature Impact Value (min) Grade 50A Grade 50R F C ft lbf J ft lbf J Standard 10 x 10 -20 -29 8.0 11.0 20.0 27.0 Sub-size 10 x 9 -20 -29 7.5 10. 19.0 26.0 Sub-size 10 x 8 -20 -29 7.0 9.5 18.0 24.5 Sub-size 10 x 7.5 -20 -29 7.0 9.5 17.0 23.0 Sub-size 10 x 7 -20 -29 6.5 9.0 16.5 22.5 Sub-size
18、 10 x 6.7 -20 -29 6.5 8.5 16.0 21.5 Sub-size 10 x 6 -20 -29 6.0 8.0 15.0 20.5 Sub-size 10 x 5 -20 -29 5.5 7.5 13.0 17.5 Sub-size 10 x 4 -20 -29 5.0 7.0 11.0 15.0 Sub-size 10 x 3.3 -20 -29 4.5 6.0 9.5 13.0 Sub-size 10 x 3 -20 -29 4.5 6.0 8.5 11.5 Sub-size 10 x 2.5 -20 -29 4.0 5.5 7.0 9.5 TABLE 4A. PR
19、EFERRED PLATE THICKNESS and REQUIRED TOLERANCES* (Inch) * For BAR and PLATE PRODUCTS DEVELOPED from HEAVY COILS Tolerance over and under Specified Thickness for Specified Widths, inch (mm) PREFERRED THICKNESS (NOMINAL) Specified Width, inches (mm) in mm in mm 60 72 1525-1828 0.250 6.35 0.013 0.33 0.
20、312 7.93 0.013 0.33 0.375 9.50 0.015 0.38 0.438 11.1 0.016 0.41 0.500 12.7 0.016 0.41 0.562 14.3 0.018 0.46 0.625 15.9 0.018 0.46 0.750 19.1 0.019 0.48 0.875 22.2 0.019 0.48 1.000 25.4 0.019 0.48 * Tolerances shown in this Table are also applicable to Universal Mill Plates and to flat rolled Rectang
21、ular Sheared Plates. * Tolerances shown in this Table are applicable to inch and to soft metric design practices. When closer tolerances are necessary, the thickness should be shown as a range (min to max) on the Engineering drawing or on the purchase order. Note: Thickness may be measured at any po
22、int across the width not less than 0.375 inch (10mm) from a cut edge or not less than 0.75 inch (20mm) from a mill edge. Thickness tolerances shown in this table do not apply to the uncropped ends of mill edge coils. SOFT METRICMETRICICNUMBER: MPAPS A-43 TITLE High Strength Low Alloy Steel Plate/Bar
23、 CURRENT ISSUE DATE: April 2016 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. APRIL 2016 Page 8 of 8 TABLE 4B. PREFERRED PLATE T
24、HICKNESS and TOLERANCES(1) (Metric) (2) For BAR or PLATE PRODUCTS DEVELOPED from HEAVY COILS Tolerance over and under Specified Thickness for Specified Widths, mm PREFERRED THICKNESS (NOMINAL) Specified Width, mm (3) 1500 1800 mm 6.5* 0.21 8.0* 0.24 10.0* 0.28 11.0 0.30 12.0 (4) * 0.30 14.0* 0.30 16
25、.0 0.34 18.0* 0.36 20.0* 0.36 25.0 0.36 * Most preferred sizes for in-plant standardization and ready warehouse availability (1) Tolerances shown in this Table are also applicable to Universal Mill Plates and to flat rolled Rectangular Sheared Plates. (2) Tolerances shown in this Table are applicabl
26、e to hard metric design practice. The metric values shown are exact and should not be converted to inch values. (3) Tolerances based on a plate width of 60-72 inches. Closer tolerances may be available by negotiation or by specifying a narrower plate product. If needed closer tolerances can be shown
27、 as a range (min to max) on the drawing or purchase order. (4) Check availability. If 12 mm is not available use 12.7 mm Note: Thickness may be measured at any point across the width not less than 15 mm from a cut edge or not less than 25 mm from a mill edge. Thickness tolerances shown do not apply
28、to the uncropped ends of mill edge coils. HARDMETRICThis 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. 2014 by Navistar, Inc. APRIL 2014 Page 1 of 7 APPENDI
29、X - GENERAL INFORMATION (Not a Requirement) CONTENTS PAGE INTRODUCTION 1 APPLICATION . 2 RECOMMENDED BENDING PRACTICE 3 WELDING 4 BRITTLE FRACTURE 6 A.1.0 INTRODUCTION High strength low alloy (HSLA) steels are a specific class of hot rolled steel having higher mechanical properties than low carbon s
30、teels, such as Grades 1 or 2 per CEMS A-6, Part I. They are generally alloyed with micro additions of niobium (Nb) (columbium), vanadium (V), titanium (Ti), nitrogen (N), or combination thereof, in conjunction with controlled rolling temperatures. The lower carbon content improves weldability. They
31、are normally furnished to mechanical property requirements rather than to close chemical composition limits or ranges. These steels are not intended for quenching and tempering, but all types can be so treated for specific applications. A.1.1 The higher strength of these steels makes them suitable f
32、or applications where weight reduction is desired. Since the elastic modulus of low carbon structural and HSLA steels is the same, the amount of allowable elastic deflection must be considered when reducing section size to take advantage of increased strength. A.1.2 These steels are generally availa
33、ble from the steel mills in any of the standard forms or shapes normally supplied in carbon steels but may not be available from warehouse stock, except perhaps in plates. NAVISTAR, INC. Material, Parts, and Process Specifications (MPAPS) NUMBER: MPAPS A-43, APPX Former Designation: CEMS A-43 APPX T
34、ITLE: High Strength Low Alloy (HSLA) Steel Plate/Bar - APPENDIX CURRENT Rev. No.: 1404 Date: April 2014 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: CEMS A-43 APPX APRIL 2010 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This speci
35、fication 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 pri
36、or to use. Change Notice: Changed to new MPAPS format; editorial changes. NUMBER: MPAPS A-43, APPX TITLE APPENDIX - HSLA Steel Plate/Bar CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Sta
37、ndards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 2 of 7 A.2.0 APPLICATION Refer to Table I below for description of Types and their characteristics. TABLE I NAVISTAR Type Designation Characteristics 42X, 45X, and 50X These are semikilled, columbiu
38、m and/or vanadium treated steels. Type 50X is the most common HSLA type used by Navistar, and is generally readily available in various product types and sizes. The NDTT* ranges for these steels are similar to mild steels. 60X, 65X, and 70X These steels are similar to the above types, with higher st
39、rength obtained by increased amounts of strengthening elements such as carbon or manganese or by the addition of nitrogen up to about 0.015 percent. This increased strength involves reduced formability, decreased weldability, and higher NDTT*. 50A and 50R These types are intended for applications wh
40、ere critical requirements justify the extra cost. The properties of these steels are insured by minimum required Charpy V-Notch impact values (and/or NDTT*) and by the restriction of yield strength. Type 50A requires less stringent impact properties than Type 50R. These steels may be treated with al
41、uminum, columbium, vanadium, nitrogen, or other alloying elements. Stress relieving, normalizing, quenching and tempering, or other thermal treatment, as necessary, to achieve the required mechanical properties is permitted. The imposition of welding restrictions may be necessary to maintain the req
42、uired mechanical properties in the final product. Sources of these types may be restricted by the controlling design engineering department. 50F, 60F, 70F, and 80F These steels are fully killed and exhibit high strength combined with excellent ductility. They are characterized by their low carbon co
43、ntent, very fine ferritic grain size (ASTM 11 or finer) and controlled inclusions. Directionality of properties is minimized by the fine grain and the absence of stringer-type inclusions. * NDTT Nil Ductility Transition Temperature NUMBER: MPAPS A-43, APPX TITLE APPENDIX - HSLA Steel Plate/Bar CURRE
44、NT ISSUE DATE: APRIL 2014 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. 2014 by Navistar, Inc. APRIL 2014 Page 3 of 7 A.3.0 RECOMMENDED BENDING PRACTIC
45、E The recommended fabricating practice for cold forming these steels is to avoid bends that are more severe than those shown in Table II. TABLE II MINIMUM INSIDE RADIUS OF 90 COLD BENDS* Navistar Type Designation Axis of Bend in Relation to Grain Flow * Thickness (T) To 0.180 in (4.6 mm), inclusive
46、0.181 to 0.250 in (4.6 to 6.4 mm), inclusive 0.251 to .500 inch (6.4 to 13 mm), inclusive 50A, 50R Parallel 2.5T 3.5T 4.5T Perpendicular 1.0T 1.0T 1.0T 42X Parallel 1.0T 1.5T 2.0T Perpendicular 1.0T 1.0T 1.0T 50X Parallel 1.5T 2.0T 2.5T Perpendicular 1.0T 1.0T 1.0T 60X Parallel 2.5T 3.0T 3.5T Perpen
47、dicular 2.0T 2.0T 2.0T 65X Parallel 3.0T 3.5T 4.0T Perpendicular 2.0T 2.0T 2.0T 50F Parallel 1.0T 1.0T 1.5T Perpendicular 0.5T 0.5T 1.0T 80F Parallel 1.5T 2.0T 2.5T Perpendicular 1.0T 1.5T 2.0T 100XF All 1.6T 1.6T 1.8T 110XF All 1.6T 1.6T 1.8T * Hot forming is recommended for all types with thicknes
48、ses greater than 0.55 inch (13.0 mm) or for bends more severe than shown. When bending with axes perpendicular to the grain flow, slightly greater thicknesses may be cold bent. Hot bending performed at a temperature of approximately 1550F (840C) may result in some loss of strength when the columbium-vanadium treated types are heated to this temperature. Loss of strength may occur for Type 50R or 50A d
