stainless steel bolts

hungupthespikes

Master Chief Petty Officer
Joined
Sep 25, 2009
Messages
814
Re: stainless steel bolts

Just take a magnet with you or use one that's in the store. If it's magnetic the SS will rust.
When the admiral wanted a new SS frig. I took one of those little pocket screwdrivers with the magnet on the top.
I should have known better. $$$$ :facepalm:
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,150
Re: stainless steel bolts

Bronze is a better choice than brass.
Brass is a no-no on a boat. Brass is an alloy of copper and zinc. The less noble zinc is highly reactive and will be eaten out of the matrix in short order. Bronze on the other hand is an alloy of copper and tin. Unlike zinc, tin is very stable materials that will last forever

Haven't had any rust or corrosion issues and had considerable cost savings over purchase of 316 SS.
That you know of??. It has nothing to do with strength. It is the composition of the alloy and how the components of the alloy react with the environment. Stainless is highly susceptible to crevice corrosion. I guarantee we could find corrosion if you remove the bolt and inspected closely

Had stainless nerf bars on a truck, they started to rust...........
There is no such thing as ?cheap? stainless steel. 99.8% of ?rusting? stainless can be attributed to improper processing of the material after fabrication. During the manufacturing proess FE (iron) particles are imbedded in the surface by either via the tooling or grinding of the materials. After fabrication, the materials is passivated (acid bath) to remove impurities introduced during the manufacturing process. If the material is not passivated, the trapped FE will begin to ?rust?.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,837
Re: stainless steel bolts

I would like to add, most high-strength stainless will patina. 17-4ph for example in both the H900 and H1150 grades will rust. it is the iron and carbon content.
 
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