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Defence & marine

Non-magnetic parts in non-magnetisable austenitic steels, welded to DIN 2303 Q2 – with a controlled material and production chain from goods inwards to the documented component.
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DIN 2303 Q2 · non-magnetisable austenitic steels · specialist welders · material traceability · single parts & small batches

What matters in defence & marine work

Non-magnetic does not start at the purchasing desk.

Certain military and, above all, naval applications call for parts in non-magnetisable austenitic steels. The German armed forces, for instance, expressly assign the non-magnetisable austenitic steel 1.3964 to the particular requirements of manufacturer qualification DIN 2303 Q2.

In naval applications of this kind, though, it is not simply a matter of buying a material with the right starting properties. What counts is the finished part. Machining, and welding in particular, can affect material properties. A suitable process chain therefore has to ensure that the project’s requirements are met from goods inwards through to the finished component. That is what fundamentally separates specialist defence manufacturing from ordinary stainless steel work.

A controlled material chain.

For specified naval materials, “material 1.3964” on a purchase order is not necessarily enough. Under BV 1050 the German armed forces maintain lists of approved producers for certain non-magnetisable parent materials and in some cases even describe their production route – from melting through rolling and heat treatment to finishing. That shows how far traceability can reach on demanding projects. For manufacturing at stainlesstec it means, depending on the project:

A defined material

Processing the specified stainless grade in line with the customer’s and the project’s requirements.

Segregated material handling

The material and machining route is organised so that unwanted mixing or foreign material is avoided.

Controlled processing

Forming, machining, welding and finishing take place under defined conditions.

Unambiguous traceability

Material and documentation stay allocable to the part and the order concerned.

Welding to DIN 2303 Q2.

DIN 2303 sets out the manufacturer qualification for welding and related processes on defence material. Class Q2 covers particular requirements – expressly including non-magnetisable austenitic steels such as 1.3964. The qualification is therefore not a certificate on the wall. Among the things examined are:

Welding coordination

The qualification of the responsible welding coordinator.

Welders & operators

The qualification of the staff doing the work.

Welding equipment

Suitable, tested plant and equipment.

Material traceability

Unbroken allocation from material to part.

Filler metals

Controlled selection and storage of filler metals.

Weld quality

Demonstrated quality of the joints made.

Welding procedure specifications

Work to established welding procedure specifications.

Procedure qualification tests

Valid procedure qualifications in place.

DIN 2303 Q2 does not mean “we weld well”. It means the prerequisites for a controlled welding process are demonstrated systematically.

More on defence technology to DIN 2303

Non-magnetisable manufacturing as a process.

1

Goods inwards

2

Unambiguous marking

3

Segregated material and tool handling

4

Machining

5

Qualified welding

6

Finishing

7

Testing

8

documentation

The magnetic property is not taken for granted – it is safeguarded by the process.

Typical manufacturing tasks

enclosures and housings

Welded or folded special structures to drawing.

frames and support structures

Complex assemblies with defined welding and test requirements.

Mounts and brackets

Small batches and single parts in specified materials.

Vessels and system components

Welded components with customer-specific connections, internals and test requirements.

Non-magnetisable naval components

Parts in specified austenitic materials with a controlled material and production chain.

Special structures to drawing

Prototypes, spares and small batches for projects where standard parts cannot be used.

Every project begins with the specification.

German armed forces technical delivery conditions can contain requirements for quality assurance and other technical and organisational matters as well as performance characteristics. We therefore do not assume that two defence projects share the same requirements. Before production starts we establish, among other things:

  • drawing revision
  • material and material delivery condition
  • the relevant DIN, WL, BV, TL or customer requirements
  • the manufacturer qualification required
  • component and welding requirements
  • approved filler metals
  • test plan
  • requirements on magnetisability
  • marking and traceability
  • the scope of acceptance and documentation

From drawing to released component

1

Review the specification

Material, drawing, code, welding requirements and testing are brought together before production planning begins.
2

Fix the material route

Purchasing, certificates, marking and project-specific segregation are defined.
3

Prepare production

CAD data, work sequences, welding procedure specifications and test requirements are coordinated with one another.
4

Build to a qualified standard

Experienced specialists combine data-driven machine work with controlled craftsmanship.
5

Test and document

The agreed test and manufacturing records are allocated unambiguously to the project.

Why stainlesstec?

DIN 2303 Q2

Qualified prerequisites for the particular welding requirements of defence material.

Materials expertise

Experience with special austenitic and project-specific stainless grades.

Our own specialist welders

Complex manufacturing tasks are carried out by skilled staff who understand material and process.

Deep in-house capability

From cutting through forming and welding to the finished assembly – many operations, carried out in a coordinated way.

Single parts and small batches

Development projects, spares and special components need flexible manufacturing, not mass production.

No part is “simply DIN 2303”.

Important: the DIN 2303 manufacturer qualification is the prerequisite for certain manufacturing tasks. Which requirements apply to a given part, however, follows from the drawing, the component class, the material, the welding requirements, the technical delivery conditions and the project’s own requirements. The German armed forces administer DIN 2303, technical delivery conditions and, for naval applications, BV 1050 centrally through WIWeB.

Let’s talk about your project.

Send us your drawing or CAD data by email – together with material, batch size and your requirements. We will come back to you with a sound assessment.

Send an enquiry by email

or write directly to info@stainlesstec.de – simply attach your drawing, STEP or DXF file.

DIRECT LINE: +49 5121 690 85-0