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. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 3 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS S-A-1.301 Former Designation: ESP-A-1.301 TITLE: Finish Specifications CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-A-1.301 - July 2010 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRE
3、NT 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. Change Notice: Changed to New MPAPS format. 1.0 SCOPE: This specification covers basic requirements for plated finishes and supplemental coatings for Navistar Standard Parts. NOTE: The *passivation process for stainless steel previously specified on page 4 of this st
5、andard has been replaced by MPAPS A-37, Type 5. All stainless steel fasteners must be passivated in accordance with MPAPS A-37, Type 5, unless otherwise specified. (See Section 6.0 of this standard for information on obtaining copies of Navistar specifications.) 2.0 GENERAL: 2.1 Specified requiremen
6、ts will refer to finish parts. All details of finish are subject to purchasers approval. 2.2 All parts to be plated must be substantially free from flaws or defects detrimental to appearance or protective value of the coatings. Cleaning, pickling, and plating procedures will be such as to insure the
7、 desired quality of plating. 3.0 RELIEF OF EMBRITTLEMENT: All steel parts having core hardness greater than 32 HRC or surface hardness of 35 HRC, as well as all highly stressed cold worked parts, subsequently electroplated with metal, are subject to embrittlement because of hydrogen absorption. It w
8、ill be the responsibility of the supplier to see that such parts are baked within one hour of electroplating (but before any supplementary coatings are applied) to relieve hydrogen embrittlement. Generally, the bake operation will involve heating in an oven until the part core temperature (not oven
9、temperature) reaches 205-215C (400-420F), and holding at this temperature for 4 hours minimum. Hardened parts which have been tempered at less than 175C (350F) should be heated in an oven until the part core temperature reaches 150C (300F) and held for 8 hrs minimum. 4.0 BASIC REQUIREMENTS: The tabl
10、e below covers the minimum requirements for finishes to be used on most standard parts. Whenever finishes other than those in the table are to be used or when specific requirements are necessary, they will be shown in the General Specifications of the standard commodity involved. NUMBER: MPAPS S-A-1
11、.301 TITLE: Finish Specifications REVISION: 1506 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. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 3 Finish Fini
12、sh Abbrev. Class Minimum Thickness on Significant Surfaces Minimum Neutral Salt Spray Hours (2) Appearance Black Organic BLZ - Per TMS-4113 120 Decorative black organic coating which is suitable for interior steel fasteners or other small steel parts requiring a black finish and moderate corrosion r
13、esistance. Black Organic BEC - Per TMS-4519 600 Non-decorative black corrosion-resistant finish for exterior fasteners not requiring UV resistance. Chromium (Bright) CRB 25CRB Per CEMS G-19, Part III. 32 “Bright“ plated finish is one normally accomplished by a polish buff, barrel tumble, or can be a
14、chieved directly from plating rack. Barrel tumbling is not to be used for chromium plated parts. 13CRB 16 8CRB 8 5CRB - 3CRB - Chromium (Dull) CRD 25CRD Per CEMS G-19, Part III. 32 “Dull“ plated finish is one which is unpolished or rough polish without buffing. “Butler”, “Satin”, and “Brush” finishe
15、s are included. 13CRD 16 8CRD 8 5CRD - 3CRD - Nickel (Bright) NIB 25NIB Per CEMS G-19, Part III. 32 “Bright“ plated finish is one normally accomplished by a polish buff, barrel tumble, or can be achieved directly from plating rack. Barrel tumbling is not to be used for chromium plated parts. 13NIB 1
16、6 8NIB 8 5NIB - 3NIB - Nickel (Dull) NID 25NID Per CEMS G-19, Part III. 32 “Dull“ plated finish is one which is unpolished or rough polish without buffing. “Butler,“ “Satin,“ and “Brush,“ finishes are included. 13NID 16 8NID 8 5NID - 3NID - Zinc ZN - Per MPAPS G-20 Per CEMS G-20 Per CEMS G-20 Phosph
17、ate Coated PHC Class B-2 Per MPAPS G-1 - Per CEMS G-1 Plain PLN - - - No supplementary finish required other than the finish considered the normal result of manufacturing processes for the material and product involved. May be slightly oiled for temporary corrosion protection during storage. Zinc Al
18、uminum Clear ZACLR Type I Per MPAPS G-4518 840 Silvery for external threads. Type II 480 Silvery for internal threads. Zinc Aluminum Black ZABLK - Per TMS-4520 1008 Black Zinc Trivalent Class 6A ZN6A Class 6A Per MPAPS G-20 96 Bright, clear, silvery Zinc Trivalent Class 8A ZN8A Class 8A Per MPAPS G-
19、20 240 Bright, clear, silvery Zinc Trivalent plus Sealer ZN8F Class 8F Per MPAPS G-20 480 Bright, clear, silvery NUMBER: MPAPS S-A-1.301 TITLE: Finish Specifications REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate
20、Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 3 5.0 TEST METHODS: 5.1 Plate Thickness Test: The thickness of plating will be determined by microscopic examination (ASTM Designation A219, latest issue) of cross sections taken pe
21、rpendicular to significant surfaces, or by magnetic or dropping tests (A219) agreed upon by the supplier and purchaser. Significant surfaces will be defined as those surfaces which are visible and subject to wear or corrosion or both, or surfaces on which the coating is otherwise functionally necess
22、ary. Generally, it may be defined as those parts of the visible surface that can be touched with a 0.75 inch diameter sphere on the product; however, all surfaces will be visibly coated. The test for thickness of coatings on threaded fasteners such as bolts, nuts, screws, etc. will be made on the sh
23、ank or other smooth surfaces as nearly adjacent to the thread as practical. The maximum thickness of plating or coating on the threads will not exceed twice in the minimum thickness for the code to minor pinholes. Base metal corrosion should not exceed one spot per square inch of significant surface
24、 and any such spots should be visible to the naked eye and will not exceed 0.06 inch in any dimension. 5.2 Corrosion Tests: Salt spray test will conform to ASTM Designation B 117. Salt spray hours represent minimum expectancy with respect to minor pinholes. Base metal corrosion should not exceed one
25、 spot per square inch of significant surface and any such spots should be visible to the naked eye and will not exceed 0.06 inch in any dimension. 6.0 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. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/
