Questions from the Shop Floor

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Questions from the Shop Floor

The most common questions from practice and from the reference book, answered briefly.

Materials

Machining

Qualification

Welding

Blasting

Cutting

Bending

Testing

Market Access

Costing

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Reference Book: Armour Steel in Production

Materials, production, qualification and business – the practical handbook for metalworking companies in the defense supply chain. Publishing once title and distribution are finalised.

Materials

Is armour steel even a standardised material I can simply order?

We've already welded Hardox — isn't armour steel the same thing?

Why shouldn't we handle our armour steel plates with the magnetic crane?

Machining

Why can't I simply mill a 5 mm component out of a 6 mm plate?

Why can't I use a magnetic chuck when drilling?

Qualification

Is our EN 1090 approval enough to supply into defense technology?

What do Q1 to Q4 under DIN 2303 actually mean, and is it a ladder?

Realistically, how long does it take to go from first approval to Q3 release for armour steel?

Is a welding specialist with a supplementary certificate enough as welding supervisor for armour steel?

What happens if we have not documented a component class?

We have ISO 3834-2 — does that put us close to DIN 2303 approval already?

Welding

Up to what hardness can armour steel still be welded at all?

Why does armour steel sometimes crack only days after welding?

How long do I have to wait before measuring the preheat temperature?

Why can't the interpass temperature just be as high as it likes?

What should we use to measure preheat and interpass temperature?

Why can't we simply hot-straighten a distorted armour steel assembly the way we would in ordinary structural steelwork?

Blasting

May we subsequently stove-enamel or nitride an already-coated armour steel part?

Cutting

Which cutting process is least critical for thick armour steel plate?

How large must the allowance be on thermally cut edges that will later be welded or bent?

Bending

Why does armour steel spring back so much more than mild steel when bent?

Why should we place bend lines transverse to the rolling direction wherever possible?

Why does training always say nobody may stand in front of the press when bending?

May we hot-straighten an incorrectly bent armour steel part?

Testing

How tight can a welded armour steel assembly realistically be toleranced?

Which inspection characteristics must we inspect 100 percent, and which may we sample?

How do we show a customer our traceability during an audit?

Why is the flatness called up on the drawing often much tighter than what the standard actually allows?

What is the difference between a concession and ordinary rework?

Market Access

Why isn't our Q3 application with the Bundeswehr making progress, even though we have prepared everything technically?

We're getting an enquiry from the defense sector for the first time — what do we typically lack the most?

What does a system house buyer want to see from us first when it comes to welding supervision?

Costing

What does a defense technology order cost extra that doesn't appear in an ordinary costing?

What does the QSB code on the drawing mean for our costing?

Should we say yes first on a defense technology quote and clarify what's missing afterwards?