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Certification of Aerospace Products to international quality Standards
Certification of Aerospace Products to international quality Standards
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Tensile test after baking: on the picture, the bolt appears yellowish. This test bolt is supposed to be made out of stainless steel, passivated. Why does this bolt look like this? It seems that this bolt looks like a steel one, with cadmium plating. Or this is just an optical effect.
Reusability test at 15 cycles: in QTR, no lubrication has been applied on GALAS00174 stainless steel bolt. Could you please confirm?
Reusability test after baking: test bolt reference is GALAS00167. Why don’t we have the same test bolt reference for both locking torque tests at 15 cycles and after baking?
Many thanks in advance,
Best regards.
Tensile test after baking: on the picture, the bolt appears yellowish. This test bolt is supposed to be made out of stainless steel, passivated.
• I confirm that the bolts are stainless steel
Why does this bolt look like this? It seems that this bolt looks like a steel one, with cadmium plating. Or this is just an optical effect.
• After baking at 425°C , we see and oxidation of the stainless steel , the color of the bolts is brown
Reusability test at 15 cycles: in QTR, no lubrication has been applied on GALAS00174 stainless steel bolt. Could you please confirm?
• No it was a mistake we have applied a lubrication with AIR 3514 oil . QTR was updated .
Reusability test after baking: test bolt reference is GALAS00167. Why don’t we have the same test bolt reference for both locking torque tests at 15 cycles and after baking?
• It was a typo in the QTR the bolts used for locking torque tests at 15 cycles and after baking are the same , see update of the QTR.
Dear Geneviève, Kees,
Many thanks for all these detailed answers!
All is clear for me now, especially the presence of oxides that are responsible for “staining” or “colouring” stainless steel test bolts (after being baked at 425°C).
Approved on my side.
Best regards.