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. 2008 by Navistar, Inc. JUNE 2008 Page 1 of 4 NAVISTAR, INC. Engineering Standard Parts NUMBER: ESP-A-1.30
2、1 TITLE: Finish Specifications CURRENT ISSUE DATE: June 2008 WRITTEN/REVIEWED BY: Corporate Technical Standards APPROVED BY: Corporate Technical StandardsSUPERSEDES ISSUE OF: May 2007PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION Change Notice: Added finish specification Black
3、 Zinc (BLZ). Replaced International Truck and Engine Corporation with Navistar, Inc. per corporate directive. 1. SCOPE This specification covers basic requirements for plated finishes and supplemental coatings for International Standard Parts. 2. GENERAL2.1 Specified requirements will refer to finis
4、h 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 desired quality of pl
5、ating. 3. RELIEF OF EMBRITTLEMENTAll 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 will be the responsibility
6、 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 temperature) reaches 205-
7、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. 5. BASIC REQUIREMENTSThe table below covers the minimum r
8、equirements 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. Copyright Navistar International Corporation Pr
9、ovided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-A-1.301 TITLE: Finish Specifications CURRENT ISSUE DATE: June 2008 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permis
10、sion from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. JUNE 2008 Page 2 of 4 Finish Finish Abbrev. Class Minimum Thickness on Significant Surfaces Minimum Neutral Salt Spray Hours (2) Appearance A 120 B 96 Black Zinc BLZ C Per TMS-4113
11、72 Decorative zinc plating which is suitable for steel fasteners or other small steel parts requiring a black finish and moderate corrosion resistance. 25CRB 32 13CRB 16 8CRB 8 5CRB - Chromium (Bright) CRB 3CRB Per CEMS G-19, Part III. - “Bright“ plated finish is one normally accomplished by a polis
12、h buff, barrel tumble, or can be achieved directly from plating rack. Barrel tumbling is not to be used for chromium plated parts. 25CRD 32 13CRD 16 8CRD 8 5CRD - Chromium (Dull) CRD 3CRD Per CEMS G-19, Part III. - “Dull“ plated finish is one which is unpolished or rough polish without buffing. “But
13、ler”, “Satin”, and “Brush” finishes are included. 25NIB 32 13NIB 16 8NIB 8 5NIB - Nickel (Bright) NIB 3NIB Per CEMS G-19, Part III. - “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
14、for chromium plated parts. 25NID 32 13NID 16 8NID 8 5NID - Nickel (Dull) NID 3NID Per CEMS G-19, Part III. - “Dull“ plated finish is one which is unpolished or rough polish without buffing. “Butler,“ “Satin,“ and “Brush,“ finishes are included. Zinc ZN - Per CEMS G-20 Per CEMS G-20 Per CEMS G-20 Pho
15、sphate Coated PHC Class B-2 Per CEMS 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. Type
16、I 840 Silvery for external threads. Zinc Aluminum Clear ZACLR Type II Per TMS-4518 480 Silvery for internal threads. Zinc Aluminum Black ZABLK - Per TMS-4520 1008 Black Zinc Trivalent Class 6A ZN6A Class 6A Per CEMS G-20 96 Bright, clear, silvery Zinc Trivalent Class 8A ZN8A Class 8A Per CEMS G-20 2
17、40 Bright, clear, silvery Zinc Trivalent plus Sealer ZN8F Class 8F Per CEMS G-20 480 Bright, clear, silvery (1) Plate Thickness Test The thickness of plating will be determined by microscopic examination (ASTM Designation A219, latest issue) of cross sections taken perpendicular to significant surfa
18、ces, or by magnetic or dropping tests (A219) agreed upon by the supplier and purchaser. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-A-1.301 TITLE: Finish Specifica
19、tions CURRENT ISSUE DATE: June 2008 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. 2008 by Navistar, Inc. JUNE 2008 Page 3 of 4 Significant surfaces wil
20、l 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 necessary. 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; how
21、ever, 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 shank or other smooth surfaces as nearly adjacent to the thread as practical. The maximum thickness of plating or coating on the threads will not
22、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 and any such spots should be visible to the naked eye and will not exceed 0.06 inch in any dimension. (2) Corrosion Tests Salt spray test will
23、conform to ASTM Designation B 117. Salt spray hours represent minimum expectancy with respect to minor pinholes. Base metal corrosion should not exceed one 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
24、. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-A-1.301 TITLE: Finish Specifications CURRENT ISSUE DATE: June 2008 This document is restricted and may not be sent ou
25、tside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. JUNE 2008 Page 4 of 4 PASSIVATION OF STAINLESS STEEL 1. SCOPE This specification covers the basic requirements for passivation of co
26、rrosion resistant steels. It is based on the principle that the primary purpose of passivation is to ensure a clean surface, free from iron bearing contaminants which cause rusting and adversely effect appearance. 2. QUALITY Stainless steel fasteners will have a bright, satin-type finish. Fasteners
27、will be uniform in color, brightness, and luster; they will be clean and free from loose scale, burrs, grease, and oil. After all operations are performed, fasteners will be passivated on all surfaces; thereafter, no subsequent finishing operations will be permitted. Visual appearance will conform w
28、ith inspection standard specimens in using plant Quality Control Department. 3. PASSIVATION Solution: 75% Nitric Acid 18-25% by Volume Sodium Dichromate 1.5-2.5% by Weight Water Balance Temperature 43-40 C (110-120 F) Time 10-30 Minutes 4. INSPECTION Solution: Copper Sulfate 40 gms Sulfuric Acid (Co
29、ncentrated) 100 ml Dilute with Water to 1000 ml Required: Place one drop of solution on passivated surface and let stand for thirty (30) minutes. Inspect for etching or copper plating which would indicate ineffective or no passivation. No visual indication of etching and/or plating will be permitted
30、. 5. CORROSION RESISTANCE Passivated stainless steel parts will pass 24 hours of CASS (fog) testing according to ASTM B368 - date of latest issue. No ferrous (red) rust corrosion product will be permitted on significant surfaces: top, sides, underhead, and shank (threads will be excluded). A light b
31、lush or patina of rust will be permissible on significant surfaces if it can be removed by polishing. Use a soft cloth wetted with a dilute suspension of pumice or extra fine tripoli (250 mesh or finer), rinse in warm water, and dry with a soft cloth. No visible evidence of corrosion will be permitted on the polished surface. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
