MIL-STD-868-SUP Nickel Plating, Low Embrittlement, Electro-DepositionThis standard covers the process and materials required for the electro-deposition of nickel on high strength steel substrates. Electro-deposited nickel is used for wear resistance, heat resistance, and as an undercoat for precious metals. Subsequent heat treating techniques needed to insure low hydrogen embrittlement of steel are also described. This standard meets the performance requirements of SAE-AMS- QQ-N-290 and may be used when SAE-AMS-QQ-N-290 is specified provided any unique requirements of SAE-AMS-QQ-N-290 are complied with.

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CONTENTS

PARAGRAPH

PAGE

FOREWORD

ii

1.         SCOPE

1

1.1                   Scope

1

1.2                   Classification

1

1.2.1                Classes

1

1.2.2                Types

1

2.

APPLICABLE DOCUMENTS

1

2.1

General

1

2.2

Government documents

1

2.2.1

Specifications, standards, handbooks

1

2.3

Non-government standards and publications

2

2.4

Order of precedence

2

3.

DEFINITIONS

2

3.1

High strength steel

2

3.2

Material batch

2

4.

GENERAL REQUIREMENTS

2

4.1

Materials and equipment

2

4.1.1

Materials

2

4.1.2

Equipment

3

4.2

Specification SAE-AMS-QQ-N-290

3

4.3

Finish

3

4.4

Shot peening

3

4.5

Embrittlement

3

4.6

Re-processing

4

4.7

Plating thickness

4

4.8

Type I plating

4

4.9

Type II plating

4

4.10

Reclaimed materials

4

5.

DETAILED REQUIREMENTS

4

5.1

General

4

5.1.1

Prior to plating

4

5.1.2

Baking

4

5.1.3

Storage of parts

4

5.1.4

Handling of parts

4

5.1.5

Masking

4

5.1.7

Racking

5

5.2

Plating procedure

5

5.3

Method 1

5

5.3.1

Step 1

5