Fatigue of A4-80 bolt
Fatigue of A4-80 bolt
(OP)
Hi all,
Does anybody know the fatigue limit of the A4-80 bolt? A4-80 is made of acid-proof steel. I have found the fatigue limit value for the 8.8 steel bolt, but not for the A4-80 acid-proof bolt.
Does anybody know the fatigue limit of the A4-80 bolt? A4-80 is made of acid-proof steel. I have found the fatigue limit value for the 8.8 steel bolt, but not for the A4-80 acid-proof bolt.





RE: Fatigue of A4-80 bolt
http://www.bulten-stainless.se/eng/index.htm
RE: Fatigue of A4-80 bolt
42] Turlach, G.: Verbindungselemente aus Titan und Titanlegierungen. Draht-Welt (1980) 5
[43] Kellerman, R.; Turlach, G.: Schrauben aus ultrafesten Stählen und Titanlegierungen für den Leichtbau. Draht-Welt 56 (1970) Nr. 1, S. 51/75; Nr. 2, S. 107/112; Nr. 3, S. 189/192 (Beilage Schrauben, Muttern, Formteile)
[44] Wiegand, H.; Illgner, K.H.; Beelich, K.H.: Festigkeit und Formänderungsverhalten von Schraubenverbindungen insbesondere aus austenitischen Werkstoffen. Draht 18 (1967) S. 517/526
[45] Beelich, K.H.: Gesichtspunkte zur Deutung des Relaxationsverhaltens und zur Auslegung temperaturbeanspruchter Schraubenverbindungen. Draht-Welt 56 (1970), S. 3/8
[46] Wiegand, H.; Beelich, K.H.: Einfluss überlagerter Schwingbeanspruchung auf das Verhalten von Schraubenverbindungen bei hohen Temperaturen. Draht-Welt 54 (1968), S. 566/570
[47] Wiegand, H.; Flemming, G.: Hochtemperaturverhalten von
Schraubenverbindungen. VDI-Z 16 (1971), S. 415/421
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Fatigue of A4-80 bolt
CoryPad: Thaks! I’ll try to find those sources.
Nowadays almost everything is standardized. I really wonder if the fatigue limit of the acid-proof bolt hasn’t been standardized. I’m sure that you can find much more needless things from the standards...
RE: Fatigue of A4-80 bolt
RE: Fatigue of A4-80 bolt
The references mentioned in VDI 2230, are a bit ancient. The influence of structure, for example, on fatigue resistance of titanium alloys is much better understood now than in the seventies when titanium bolts were in their infancy. Gerhard Turlach, who is one of the authors mentioned, and who continues to be active in standardisation circles, has written much more recent papers on the subject.
RE: Fatigue of A4-80 bolt
If I were working on more critical parts, with newer materials and/or production techniques, I would look into more recent publications, or more likely, conduct new testing.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Fatigue of A4-80 bolt
Could you please tell me more about Inconel 718 bolts? Do you know exact fatigue values of 718? A4-80 (316) has good enough corrosion resistance in our case and I think Inconel 718 is at least as good as A4-80? Is the Inconel 718 bolt much more expensive than “common” acid-proof bolt A4-80?
Can anybody recommend me the bolt, which has higher fatigue limit than A4-80 has. The corrosion resistance has to be as good as the corrosion resistance of A4-80. The price should be low enough.
RE: Fatigue of A4-80 bolt
Austenitic stainless steels can have higher strength (including fatigue) if it is strain hardened. Ask some suppliers.
Other alloys to consider are A-286, 17-4 PH, and a few new ones from Carpenter Technology:
http://
Also check out the articles on cold heading:
http://cr
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.