Questions and answers

What’s the difference between A2 stainless steel and A4 stainless steel?
The basic difference between the two steels is that A4 steel alloy contains molybdenum.
This chemical composition provides optimal resistance to local corrosion (greater than A2 stainless steel resistance) and therefore enables use in processes bringing this steel into contact with various acids and chemical reagents even at high temperatures.
This steel is used above all in the pharmaceuticals and food-processing sectors.

Can stainless steel rust?
Stainless steel is highly resistant to corrosion in oxidizing environments.
However, corrosion may occur in reducing environments (in which there is no contact with oxygen).

Why is the stainless steel rivet sometimes magnetic?
The material is not truly magnetized. We are dealing with residual magnetism (since stainless steel is a diamagnetic material) induced by mechanical working (drawing and moulding).

Can a rivet be used for non-metallic materials?
Correct positioning can’t be guaranteed. The rivet may draw completely or partly precisely because there is no resistance to its upward movement, in which case it will cause warping of the parts to be fastened.
We recommend specific rivets for fastening operations of this kind (Multifar or Graf).

Which is the correct nozzle for a blind rivet?
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