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. 2014 by Navistar, Inc. February 2014 Page 1 of 29 NAVISTAR, INC. Material, Parts, and Process Specificat
2、ions (MPAPS) NUMBER: MPAPS F-31, Part I Former Designation: CEMS A-31, Part 1 TITLE: Steel Bolts and Studs CURRENT REV No.: 1402 DATE: Feb. 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: CEMS A-31, Part 1 Oct. 2012 PRINTED COPIES OF THIS DOCUMENT MUST BE
3、 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 t
4、he applicability of regulatory limits prior to use. Change Notice: New MPAPS format; editorial changes. 1.0 APPLICATION This specification provides guidance to the selection and use of steel bolts and studs in Navistar design. Bolted joints are used extensively in the assembly of our products and pr
5、ovide for adjustment, replacement and ease of repair. Material properties of both inch and metric fasteners are covered in this specification. 2.0 SCOPE This specification covers the Corporations requirements for the material and properties of steel bolts and studs. Dimensional requirements and gene
6、ral specifications for standard bolts are covered in the Engineering Standard Parts (ESP) standards, Section B and BM. Nonstandard bolts and studs will be covered by engineering drawings which should refer to this specification for material and property requirements. For purposes of this specificati
7、on, the term “bolts“ also includes cap screws and SEMS (i.e., term used to describe screw and washer assemblies); the term “studs” also includes quenched and tempered U-bolts. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification
8、 must comply with the requirements of the MPAPS B-50 specification. 3.0 CONTENTS PAGE REFERENCE DOCUMENTS 2 CLASSIFICATION AND IDENTIFICATION 2 CHEMICAL COMPOSITION 6 MECHANICAL PROPERTIES 7 METALLURGICAL REQUIREMENTS 15 HEAT TREATMENT 22 QUALITY 23 METHODS OF TEST 23 QUALIFICATION 28 SOURCE APPROVA
9、L AND QUALITY CONTROL 28 SHIPPING AND HANDLIND 29 DESIGNATION ON DRAWINGS 29 NUMBER: MPAPS F-31 Part I TITLE: Steel Bolts and Studs REVISION: 1402 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are
10、 required to assume all patent liability. 2014 by Navistar, Inc. February 2014 Page 2 of 29 4.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. Qua
11、lity System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 ASME B1.1 ISO 965-1 ASTM E8 ASTM E18 NAVISTAR Manufacturing Std. MS-D-13 NAVISTAR CEMS AT-2 ISO 898-1 ASTM A 307 ASTM E112 ASTM F606/F606M NAVISTAR Engineering Design Std A-16 ASTM A 325 ASTM F2328 NAVISTAR Eng. Procedural Std ESP-61
12、NAVISTAR MPAPS B-50 ASTM E 3 ASTM A 490 ASTM A 354 ASTM A 354 ASTM A 370 ASTM A 449 SAE J429 SAE J121 SAE J123 SAE J417 SAE J1061 5.0 CLASSIFICATION AND IDENTIFICATION 5.1 Classification Steel bolts and studs are classified, or graded, on the basis of their mechanical properties. Increasing Class or
13、 Type numbers correspond to increasing tensile strength requirements. Suffix letters or numbers are used to denote physical, chemical or other property variations of fasteners within the same strength classification. 5.2 Identification Identification requirements for each Navistar Type or Class are
14、shown in Tables I, Ia, and Ib. All standard and/or special bolts, except Type I, will have permanent, legible, head markings (raised or depressed) to indicate bolt Type or Class as shown in Tables I, Ia, and Ib. A manufacturers identification symbol, which uniquely identifies the manufacturer, will
15、be included and should preferably be in the center of the head. For Types 8R and 9R, the manufacturers identification symbol must be in the center of the head. The symbol must not exceed 0.4 mm (0.016 inch) in height, nor be of length greater than 33% of the dimension across flats. 5.3 Manufacturers
16、 Identification Specific requirements for the registry of manufacturers identification symbols may be established by regulatory controls. Manufacturers identification symbols used on Navistar fasteners must comply with all established regulatory controls. . NUMBER: MPAPS F-31 Part I TITLE: Steel Bol
17、ts and Studs REVISION: 1402 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. February 2014 Page 3 of 29 TABLE I CLASSIFICATION AND
18、IDENTIFICATIONINCH FASTENERS Designation Material Type (2) Thermal Treatment (2) Head Marking Navistar Obsolete IH Type Approx. SAE J429 Grade Approx. ASTM (Bolts Only) Type * Product 1 Bolts Screws Studs 2 (1) A 307 Low or Medium Carbon Steel None None 5 Bolts Screws Studs 2 5 A 325 Type 1, or A 44
19、9 Medium Carbon Steel (3) Quenched and Tempered 5.1 SEMS - 5.1 - Low or Medium Carbon Steel (3) 5.2 Bolts Screws 5B 5.2 A 325, Type 2 Low Carbon Boron Steel 8 Bolts Screws Studs 3, 4 8 A 354, Grade BD, or A 490 Medium Carbon or Medium Carbon Alloy Steel (4) Quenched and Tempered 8.2 Bolts Screws 8B
20、8.2 Low Carbon Boron Steel 8.1* Studs 4E or 8E 8.1 1541 Modified or Medium Carbon Alloy Steel Elevated Temperature Drawn None * Bolts in sizes through inch with lengths through 6 inches will be roll threaded unless otherwise specified. * Studs only (includes U-bolts) (1) SAE Grade 2 is not applicabl
21、e to Type 1 studs over inch diameter. (2) For detailed chemical composition and heat treatment requirements, see Table II for Chemical Composition and Table VIII for Heat Treatment requirements. (3) For Type 5 and 5.1 fasteners, medium carbon boron or medium carbon alloy steels used for Grade 8 may
22、be used at the suppliers option. (4) When agreed to by manufacturer and purchaser, medium carbon steel may be used for products 7/16 inch in nominal diameter and smaller, and medium carbon boron steel may be used for products 1 inch in nominal diameter and smaller. NUMBER: MPAPS F-31 Part I TITLE: S
23、teel Bolts and Studs REVISION: 1402 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. February 2014 Page 4 of 29 TABLE Ia CLASSIFICA
24、TION AND IDENTIFICATIONMETRIC FASTENERS Designation Nom. Size Material Type (1) Thermal Treatment (1) Head Marking (2) Navistar Class * Approximate ISO 898-1 Preferred Optional 5.8 (3) 5.8 M5 thru M24 Low or Medium Carbon Steel None Required 8.8 8.8 M1.5 thru M36 Medium Carbon or Medium Carbon Boron
25、 or Medium Carbon Alloy Steel or Low Carbon Boron Steel Quenched and Tempered 9.8 (4) (5) 9.8 M1.6 thru M16 10.9 10.9 M6 thru M36 * Bolts in sizes through 20 mm with lengths through 150 mm will be roll threaded unless otherwise specified. (1) For detailed chemical composition and heat treatment requ
26、irements, see “see Table IIa for Chemical Composition and Table VIII for Heat Treatment requirements. (2) When low carbon boron steels are used for fastener sizes thru M20 in classes 8.8 and 9.8, the symbol will be underlined (e.g., 8.8, 9.8). (3) Class 5.8 requirements apply to bolts and screws wit
27、h lengths of 150 mm and shorter and to studs of all lengths. (4) Not to be specified for new designs. Class 9.8 is an acceptable alternate to Class 8.8 to assure maximum material availability in North America. (5) For Class 9.8 SEMS base metal hardness may be 25-40 HRC and surface hardness shall not
28、 exceed 60 HR30N. This requirement is applicable to fasteners manufactured same as SEMS except without the washer, sizes M1.6 thru M12. 5.8 5.8 8.8 8.8 9.8 9.8 10.9 10.9 NUMBER: MPAPS F-31 Part I TITLE: Steel Bolts and Studs REVISION: 1402 This document is restricted and may not be sent outside Navi
29、star, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. February 2014 Page 5 of 29 TABLE Ib CLASSIFICATION AND IDENTIFICATION-SPECIAL USE FASTENERS Navistar Designation * Type of Material * Thermal
30、Treatment * Head Marking (1) Preferred Optional Class INCH FASTENERS 8 R (2) Medium Carbon or Medium Carbon Alloy Steel Quenched and Tempered, Roll Threaded After Heat Treatment 9 (3) Medium Carbon Alloy Steel Quenched and Tempered 9R (2) (3) Medium Carbon Alloy Steel Quenched and Tempered, Roll Thr
31、eaded After Heat Treatment Class METRIC FASTENERS 10.9R (2) Medium Carbon, Medium Carbon Alloy Steel Quenched and Tempered, Roll Threaded After Heat Treatment 12.9 (3) Medium Carbon Alloy Steel Quenched and Tempered 12.9R (2) (3) Quenched and Tempered, Roll Threaded After Heat Treatment * Bolts size
32、s thru M20 or inch with lengths thru 150 mm or 6 inches will be roll threaded unless otherwise specified. * For detailed chemical composition and heat treatment requirements, see Table IIb for Chemical Composition, and Table VIII for Heat Treatment. (1) Head marking for identification is mandatory a
33、s described in Section 5.3. Where an optional head marking is not indicated, the preferred head marking is required. (2) When roll threading after heat treatment is required, roll threading will be accomplished in one pass; rerolling is not permitted. Normally, roll threaded after heat treatment bol
34、ts are specified for special applications requiring enhanced fatigue resistance. Typically, these bolts are designed and specified with special configurational refinements that increase fatigue life. The usage of bolts roll threaded after heat treatment (8R, 10.9R, 9R, or 12.9R) is allowed after con
35、sultation with Design Analysis and Materials Engineering. These fasteners are associated with cost penalties. (3) Applications for Type 9 and Class 12.9 Hex Headed fasteners should be minimized. These fasteners require approval from Design Analysis and Materials Engineering. The capability of the bo
36、lt manufacturer and the anticipated in-use environment must be considered. These products require rigid production controls and may be susceptible to stress corrosion cracking in certain environments. 10.9R 12.9 12.9R 8R 9R 10.9R 12.9 12.9R 9 NUMBER: MPAPS F-31 Part I TITLE: Steel Bolts and Studs RE
37、VISION: 1402 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. February 2014 Page 6 of 29 6.0 GENERAL REQUIREMENTS 6.1 Chemical Comp
38、osition Bolts and studs purchased to this specification will conform to the limits and requirements shown in Tables II, IIa, and IIb (Chemical Composition, Inch Fasteners; Chemical Composition, Metric Fasteners, and Chemical Composition, Special Usage Fasteners). Fasteners in any one container will
39、consist of only one nominal steel analysis. TABLE II. CHEMICAL COMPOSITION *, INCH FASTENERS Navistar Type Approx SAE J429 Grade Nominal Diameter, Inches Elemental Composition, weight percent (Max, except where shown as min or range) Deoxidation Practice Carbon Phosphorus Sulfur Alloys * BOLTS 1 2 -
40、 1 0.15- 0.55 0.05 0.05 0.06 0.06 Optional Optional 5 5 - 1 0.25-0.55 0.05 0.06 Optional Fully Killed 5.1 5.1 No.4 thru 5/8” 0.15-0.55 Optional Fully Killed, Fine Grain (1) 5.2 5. 2 thru 1” dia 0.15-0.25 Boron: required. Other: optional 8 (3) (4) 8 - 1 0.25-0.55 0.05 0.06 Optional Fully Killed, Fine
41、 Grain (1) 8.2 (2) 8.2 thru 1” dia 0.15-0.25 0.05 0.06 Boron: required. Other: optional STUDS 1 2 All (5) 0.15- 0.55 0.12 0.35 Optional Optional 5 5 All 0.25-0.55 0.05 0.15 Optional Fully Killed 8 (3) (4) 8 Under additional variations for check analysis do not apply. Use of steels to which bismuth,
42、selenium, tellurium, or lead has been intentionally added is not permitted for Types 5 or 8 bolts or studs. * Refers to alloying elements: Mn, Ni, Cu, Cr, Mo, and B. For boron steels, B = 0.0005 - 0.003%. For Type 5 and 5.1 fasteners, medium carbon boron or medium carbon alloy steels used for grade
43、8 may be used at the suppliers option. (1) Austenitic grain size will be 5 or finer as determined by the McQuaid-Ehn, Test Method AT-2 or other suitable test (occasional grains as large as 3 are permissible). In the event of controversy, the McQuaid-Ehn test per ASTM E112, Appendix III will be the r
44、eferee method with any modifications as may be noted. (2) Use of Type 8.2 requires prior approval by Engineering. Tempering temperature is 650F, instead of the regular 800F (3) Steel for Type 8 bolts and studs will have sufficient hardenability to produce 90% min. martensite at the center of the thr
45、eaded section, one diameter from the end of the bolt or stud as specified in Section 6.4, “Heat Treatment”. (4) Medium carbon or medium carbon alloy steel required, unless deviation in steel composition is approved by the controlling design engineering department. When agreed to by manufacturer and
46、purchaser, medium carbon steel may be used for products 7/16 inch in nominal diameter and smaller, and medium carbon boron steel may be used for products 1 inch in nominal diameter and smaller. (5) Maximum 0.38% lead permissible. NUMBER: MPAPS F-31 Part I TITLE: Steel Bolts and Studs REVISION: 1402
47、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. February 2014 Page 7 of 29 TABLE IIa CHEMICAL COMPOSITION *, METRIC FASTENERS Navi
48、star Class Nominal Diameter, mm Elemental Composition, weight percent (Max, except where shown as min or range) Deoxidation Practice Carbon Phosphorus Sulfur Others BOLTS AND STUDS 5.8 Thru M24 0.13- 0.55 0.05 0.06 Optional Optional 8.8 All 0.25-0.55 (1) 0.05 0.06 Optional Fully Killed 9.8 Thru M16
49、0.25-0.55 (1) 0.05 0.06 Optional Fully Killed 10.9 * All 0.25-0.55 (2) 0.05 0.06 Optional Fully Killed, Fine Grain (3) * All values are for product analysis; additional variation for check analysis does not apply. * Steel for 10.9 bolts and studs will have sufficient hardenability to produce 90% min. martensite at the center of the
