BS M 37:1970

This standard BS M 37:1970 Method for the etch inspection of metallic materials and components is classified in these ICS categories:

• 49.025.01 Materials for aerospace construction in general
• 49.035 Components for aerospace construction

1.1.1 This British Standard describes a method for carrying out etch inspection of metallic materials and components and describes some of the widely accepted etching solutions currently in use.

1.1.2 The materials covered by the standard are grouped as follows :

Ferrous metals

1. Plain carbon, medium and low alloy steels.
2. High alloy (corrosion and heat-resisting) steels.

Non-ferrous metals

1. Copper alloys.
2. Aluminium alloys.
3. Magnesium alloys.
4. Titanium alloys.
5. Nickel and cobalt base alloys.