What is BS EN 3943- Nickel base alloy NI-B41204 for aerospace series about?
BS EN 3943 is an international standard that discusses nickel base alloy and filler metal for brazing.
BS EN 3943 specifies the requirements relating to:
- Nickel base alloy NI-B41204 (NiCr13Fe4Si4B3)
- Filler metal for brazing
- Powder or paste
for aerospace applications.
BS EN 3943 provides the material designation, product qualification, and technical specification of the filler wire for welding.
Who is BS EN 3943- Nickel base alloy NI-B41204 for aerospace series for?
BS EN 3943 on nickel base alloy NI-B41204 for aerospace series is relevant to:
- Manufacturers of aerospace equipment and components
- Manufacturers of nickel-base alloys
- Manufacturers and suppliers of filler metal for brazing
- Quality assurance personnel
- Metallurgical engineers 
- Aeronautical engineers  
- Aerospace engineers  
- Aerospace and defence industries 
- Testing authorities
Why should you use BS EN 3943- Nickel base alloy NI-B41204 for aerospace series?
Nickel base alloys are materials that are composed of nickel and some other alloys. The mechanical and other properties of the alloy, differ with the change in the composition of the elements used in it, and hence, their application changes accordingly.
BS EN 3933 is part of the series of EN metallic materials for aerospace applications. The general organization of this series is described in EN 4258.
BS EN 3894 has been prepared in accordance with EN 4500-6. It covers all the requirements for nickel base alloy and filler metal for brazing.
BS EN 3933 creates a standardized approach for manufacturers of nickel-base alloy and filler metal for brazing and to adhere to if they supply their metallic materials for use by the aerospace and defence industry. 
By adopting BS EN 3933, manufacturers can demonstrate the reliability of their metallic materials products and build trust for their use throughout the aerospace supply chain.
