Need help with a choice of bolting material
Need help with a choice of bolting material
(OP)
Hello All,
I am faced with the issue of joining 2 large peices of nickel plated steel together in a sub sea environment, and I need help with an appropriate choice of bolting material. My first thought was Duplex SS, but I am not sure where duplex actually falls in the galvanic series in relation to Nickel.
I am thinking 300 series is not a good option because of the temperature ranges supplied to me by the end user, perhaps Alloy 825 would be an option?
Any input or suggestions for other economical alloy choices would be appreciated.
Best Regards,
-VRF
I am faced with the issue of joining 2 large peices of nickel plated steel together in a sub sea environment, and I need help with an appropriate choice of bolting material. My first thought was Duplex SS, but I am not sure where duplex actually falls in the galvanic series in relation to Nickel.
I am thinking 300 series is not a good option because of the temperature ranges supplied to me by the end user, perhaps Alloy 825 would be an option?
Any input or suggestions for other economical alloy choices would be appreciated.
Best Regards,
-VRF





RE: Need help with a choice of bolting material
NiCu Alloy 400, NiCuAl, Alloy 625+, Alloy 725, Titanium
Those would work regarding corrosion, but maybe not for other factors like thermal expansion. For joining steel to steel members that are submerged, the following fastener materials are recommended:
MP35N, Titanium, NiCu alloy 400, NiCuAl, CRES 660/A286, coated C & alloy steel
The NiCuAl alloy looks like a good choice. It is identified in the USA Federal Government document QQ-N-286 NICKEL-COPPER-ALUMINUM ALLOY, WROUGHT (UNS N05500).
RE: Need help with a choice of bolting material
Best Regards,
VRF
RE: Need help with a choice of bolting material
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