DEFSTAN 03-4/5(2006) : 2006

Foreword
0 Introduction
1 Scope
2 Warning
3 Normative References
4 Definitions
   4.2 Baking
   4.3 Categorisation of Steels
   4.4 Design Authority
   4.5 Heat Treatment Times
   4.6 Hydrogen Embrittlement
   4.7 Process Control Schedule
   4.8 Physical Preparation
   4.9 Stress Relief
5 Information to be Supplied by the Purchaser
6 Process Control
7 Recommendations for Design and Manufacture
   7.1 Design Considerations
         7.1.1 Choice of Steel
         7.1.2 Avoidance of Stress Concentrations
         7.1.3 Protective Treatment
   7.2 Type Testing
   7.3 Manufacture
         7.3.1 Machining and Grinding
         7.3.2 Chemical Machining
         7.3.3 Cold Forming
         7.3.4 Surface Rolling
         7.3.5 Protection During Manufacture
         7.3.6 Etch Inspection
8 Physical Preparation
   8.1 Stress Relief
         8.1.1 General
         8.1.2 Standard Procedure
         8.1.3 Stress Relief of Items
                 8.1.3.1 Items not given a Treatment to Introduce
                         Beneficial Compressive Stresses into the
                         Surface
                 8.1.3.2 Items given a Treatment to Introduce
                         Beneficial Compressive Stresses into
                         the Surface
                 8.1.3.3 Springs
   8.2 Mechanical Preparation
                 8.2.1.1 Shot Peening
                 8.2.1.2 Surface Rolling
                 8.2.1.3 Abrasive Blasting
9 Cleaning
   9.2 Category 1451 - 1800 MPa Steels
   9.3 Category 1801 MPa and Greater Steels
10 Protective Treatments
   10.1 Precautions Applicable to all Treatments
   10.2 Cadmium Plating (Def Stan 03-19)
         10.2.1 Preparation
         10.2.2 Choice of Electrolyte
         10.2.3 Baking
         10.2.4 Protection Against Vapour Corrosion
   10.3 Physical Vapour Deposition of Aluminium, Cadmium
         and Titanium Nitride (Def Stan 03 parts 1, 2 and 3)
   10.4 Cadmium Coating by Vacuum Evaporation (DTD 940 Obsolete)
   10.5 Zinc Plating (Def Stan 03-20)
   10.6 Hard Chromium Plating (Def Stan 03-14)
         10.6.1 Preparation
         10.6.3 Post Plating Grinding
   10.7 Nickel Plating for Engineering Purposes
         (Def Stan 03-27)
   10.8 Electroless Nickel Coating of Metals (BS EN ISO 4527)
   10.9 Rhodium Plating (DTD 931 Obsolete)
   10.10 Silver Plating (Def Stan 03-9)
   10.11 Gold Plating (Def Stan 03-17)
   10.12 Sprayed Coatings of Aluminium and Zinc
         (BS EN ISO 2063)
   10.13 Phosphate Treatment (Def Stan 03-11)
   10.14 Paint Applied to Uncoated Steel
   10.15 Processes Permitted but not Recommended
         10.15.1 Tin Plating (BS 1872)
         10.15.2 Copper Plating
   10.16 Processes not Permitted
         10.16.1 Tin-Zinc Alloy Plating
         10.16.2 Sheradizing (BS 4921)
         10.16.3 Hot Dip Galvanizing
   10.17 Re-Processing and Re-Furbishment
11 Inspection and Testing
Annex A - Method for Determining Oxidizable Material in
          Sulfuric Acid
   A.1 Methodology

Sets out the special treatments and precautions that are to be observed when protective and other surface treatments are applied to items, including springs, made from steel of specified maximum tensile strength exceeding 1450 MPa.