Hi Jon... Great video as always... I love the shape of the stainless steel stopper and the fact that you have designed it is a plus... That is a lovely simple form... and I like simple... I will add a couple of these to my order... Take care...All the best.....Andy
Hi Jon, Nice looking bottle stopper and great explanation of the other "Stainless Steel" stoppers out there. Great video as ever Jon. Take care. Cheers, Huw
I think your analysis of determining if your stoppers are stainless is a bit hit and miss. Not all stainless steels are expensive. An example would be a draining board/sink which are cheap compared to stainless steel used in food production and surgical applications. A basic stainless steel has a ‘ferritic’ structure and is magnetic, formed from the addition of chromium - it can be hardened through the addition of carbon, making it ‘martensitic’. However, the most common stainless steels are ‘austenitic’ - these have a higher chromium content and nickel is also added. It is the nickel which modifies the physical structure of the steel and makes it theoretically non-magnetic. 316 stainless steel, (used in surgical/food) is a molybdenum-alloyed steel. The fact that it is also negligibly responsive to magnetic fields means that it can be used in applications where a non-magnetic metal is required. So, if its magnetic its still stainless, but a cheap version, (zinc alloy type) and if non magnetic its the higher end quality steel.
The inexpensive stainless steels mentioned are common household parts that are sold in their millions - completely different to the specialist low volume parts we are discussing so it is not a fair comparison. We are discussing woodturning bottle stoppers not surgical instruments or kitchen sinks so that is rather irrelevant. We try not to blind with science we are merely making the point that some sellers mis-describe items (not necessarily on purpose) the basic information is designed to assist with identification that a layperson can understand- whilst all the information you have given is very interesting it fails to explain how to tell the difference between 2 similar looking parts. The identification by looking at the edge of 2 types is one of the best ways because the 2 materials are generally manufactured using different methods (SS=CNC and Zincalloy-moulded& plated). The problem is one of identification for someone sold a zinc-alloy that claims to be stainless - the magnetic properties fails to do that as both often react the same way.
Hi Jon...
Great video as always...
I love the shape of the stainless steel stopper and the fact that you have designed it is a plus...
That is a lovely simple form... and I like simple...
I will add a couple of these to my order...
Take care...All the best.....Andy
Thanks Andy - simple like me! - many thanks for the order 😁👍
Hi Jon, Nice looking bottle stopper and great explanation of the other "Stainless Steel" stoppers out there.
Great video as ever Jon.
Take care.
Cheers, Huw
Thanks Huw👍
I think your analysis of determining if your stoppers are stainless is a bit hit and miss. Not all stainless steels are expensive. An example would be a draining board/sink which are cheap compared to stainless steel used in food production and surgical applications. A basic stainless steel has a ‘ferritic’ structure and is magnetic, formed from the addition of chromium - it can be hardened through the addition of carbon, making it ‘martensitic’. However, the most common stainless steels are ‘austenitic’ - these have a higher chromium content and nickel is also added. It is the nickel which modifies the physical structure of the steel and makes it theoretically non-magnetic.
316 stainless steel, (used in surgical/food) is a molybdenum-alloyed steel. The fact that it is also negligibly responsive to magnetic fields means that it can be used in applications where a non-magnetic metal is required.
So, if its magnetic its still stainless, but a cheap version, (zinc alloy type) and if non magnetic its the higher end quality steel.
The inexpensive stainless steels mentioned are common household parts that are sold in their millions - completely different to the specialist low volume parts we are discussing so it is not a fair comparison. We are discussing woodturning bottle stoppers not surgical instruments or kitchen sinks so that is rather irrelevant. We try not to blind with science we are merely making the point that some sellers mis-describe items (not necessarily on purpose) the basic information is designed to assist with identification that a layperson can understand- whilst all the information you have given is very interesting it fails to explain how to tell the difference between 2 similar looking parts. The identification by looking at the edge of 2 types is one of the best ways because the 2 materials are generally manufactured using different methods (SS=CNC and Zincalloy-moulded& plated). The problem is one of identification for someone sold a zinc-alloy that claims to be stainless - the magnetic properties fails to do that as both often react the same way.