Valve ?
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Pro
Joined: Jun 2013
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Valve ?
For giggles i decided to put a magnet on the valves in my Mast 305 heads which are supposed to have Hollow SS intake and Inconel exhaust. The intake surface and stem is magnetic and the exhaust face is non-magnetic but the stem is does that sound right?
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From: Oshawa, Ontario
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Pure metals are rarely found in any product manufactured today because they don't have the characteristics needed to match the design purpose.
Using a magnet is only helpful to identify some iron alloys.
Using a magnet is only helpful to identify some iron alloys.
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From: Austin Texas
No such thing as "some iron in SS". Stainless steel IS IRON alloyed with carbon.!
All steel is iron with added carbon. SS is iron + carbon + chromium + nickel.
ie; 18/8 SS is iron + carbon + 18% Chromium + 8% Nickel
All steel is iron with added carbon. SS is iron + carbon + chromium + nickel.
ie; 18/8 SS is iron + carbon + 18% Chromium + 8% Nickel
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SS Lesson
18/8 (aka 304 or 300 series) stainless steel - with about 70% iron - is non-magnetic because the nickel makes the atomic structure face-centered cubic, like copper, silver, and gold.
400 series stainless steel has at least 12% Chromium to make it very rust resistant - and about 85% iron - but no nickel, so the atomic structure is body-centered cubic, just like plain old mild steel, and it IS very magnetic.
High quality knife blades are made from 440C (in the 400 series) stainless steel that can be heat-treated to a high strength and hardness, and is also quite magnetic.
I have a P.E. license in metallurgical engineering, among other things.
400 series stainless steel has at least 12% Chromium to make it very rust resistant - and about 85% iron - but no nickel, so the atomic structure is body-centered cubic, just like plain old mild steel, and it IS very magnetic.
High quality knife blades are made from 440C (in the 400 series) stainless steel that can be heat-treated to a high strength and hardness, and is also quite magnetic.
I have a P.E. license in metallurgical engineering, among other things.