SuperTwo
Member
- Location
- Leinster, Ireland
Is there any information available on the grades of steel used to make kristeel mouldboards?
Stainless steel mouldboards'
- Thread starter Pennine Ploughing
- Start date
Not really "available for the plough at time of manufacture" though! No need for the backing plate, the delrin boards I have seen are half inch thick, dont bend much! Oh and I have been told, cost much more than standard boards, though never having bought any, I cant be sure of this.
Mydexta
Member
- Location
- Dundee/angus
I was at a farm
Sale once and saw 4 plastic ucn boards, they were about 1/2" thick and went for 99p.
Didn't give it much thought at the time but now wonder what could have been
Sale once and saw 4 plastic ucn boards, they were about 1/2" thick and went for 99p.
Didn't give it much thought at the time but now wonder what could have been
Had never heard of that name before Harry, was told by one of the blokes when I done my aprentership about all plastic engines, so I suppose that's were some of the technology came from ?
They are probably still sitting in some one elseses shed ! Would be an interesting project though
Delrin is a white, waxy type of nylon, often used for Nylon bearings etc. It can be fun to use, as nothing will stick to it, so keeping it in place can be fun.I have seen it used for motor boat props in the early 1970s, but as as it absorbed water, it was not all that good there as it swelled, and changed shape.I expect the modern versions may have overcome those problems though.
UCN boards, best left in the shed!
MF420
New Member
- Location
- East Midlands
In the coal fired power stations in which I worked thè coal chutes which which handled many thousands of tonnes of raw coal were initially manufactured fŕom mild steel. Because of the blockage problems caused by coal, mud etc.sticking to the mild stèel chutes we had to find a better material ? We turned to stainless steel which reduced the sticking and blockage significantly with wear rates being improved somewhat ?
I guess this experience could be translated to the use or stainless steel in the manufacture of plough mouldboards ? Because of its higher tensile strength the stainless steel was more difficult to manipulate and work !
I guess this experience could be translated to the use or stainless steel in the manufacture of plough mouldboards ? Because of its higher tensile strength the stainless steel was more difficult to manipulate and work !
- Location
- 200 miles N,NW of New York
thanks that is interesting
Whilst the properties of stainless are far superior to mild steel, then so are materials such as Kristeel
It is the range of properties you are looking for coupled with the characteristics of the material you are handling. For example in road and slurry tanker manufacture and design, 3mm stainless equates to 6mm mild steel, not only due to the tensile strength but also to its corrosion resistance properties. A guillotine capable of cutting 6mm mild steel would struggle to cut 4mm stainless at full width.
From a plant point of view, coal is reasonably easy to load and is reasonably self lubricating, unlike rock, and as you so rightly say, contains muds and shales which need handling materials which are capable of resisting sticking. Normally in locations exposed to extreme wear, then super hard materials such as Hardox would have been used.
Garden spades made of stainless are sold as being non stick. They are also far more brittle than their steel counterparts.
In general according to Brinell hardness, 416 stainless is 190-220, with some variants reaching as much as 350. One of the significant differences is that they can't be hardened any further. Materials currently used for plough manufacture wearing parts are usually in the order of 440-460, the significant factor being that this hardness usually takes the form of an outer shell, which allows flexibility due to the softer core. One of the materials alloyed in plough steel is Boron. Whilst used in very small quantities, what it does is allow / promote alignment of molecules during the hardening process.
Not trying to be Devils advocate or one of these
Just simply stating facts.
Thinking about it in real terms, if stainless had ever been a viable material, it would have been in use long ago.
Should have had this picture for the thread Ploughing Today
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- Location
- 200 miles N,NW of New York
I can see where you are coming from, but the idea was my high cut boards are thin, you cannot get them anywhere, so looking for ideas on making a new pair in times to come
Have patched several up for folk over the years, and that as in invisible mending as opposed to patching over. Was just doing some DB boards for a friend before the spell in hospital
Usually mig is fairly amenable to welding Kristeel and does actually alloy with it whilst welding, giving you a fairly durable and reasonably corrosion free weld.
Will doubtless have to do something similar to a 69BK on my number 9. Three main areas of wear are front corner where the shin would fit on a semi digger, underneath, and very rearmost point which wears back past a feather edge. A die grinder always comes in handy for the countersink if you encroach on any holes.
Good luck but it's not difficult with time and the right clamps.
- Location
- 200 miles N,NW of New York
thanks for that, but if they get any thinner, i will be able to wrap the turkey up at xmas
I have repaired YL boards but in some respects they are unique in that most of the area is convex as opposed to other boards, many of which are largely concave The shin area edge of a YL is relatively easy using 1/4" strimmer shaft. I have found that they show no wear once repaired as we use discs in match ploughing as opposed to their commercial use in years gone by
Just ridged my spuds up with a stainless ridger and the kind loamy soil certainly stuck I would not have expected that with a good shiny carbon steel ridger but then how many gardeners look after their tools like they used to.Whilst the properties of stainless are far superior to mild steel, then so are materials such as Kristeel
It is the range of properties you are looking for coupled with the characteristics of the material you are handling. For example in road and slurry tanker manufacture and design, 3mm stainless equates to 6mm mild steel, not only due to the tensile strength but also to its corrosion resistance properties. A guillotine capable of cutting 6mm mild steel would struggle to cut 4mm stainless at full width.
From a plant point of view, coal is reasonably easy to load and is reasonably self lubricating, unlike rock, and as you so rightly say, contains muds and shales which need handling materials which are capable of resisting sticking. Normally in locations exposed to extreme wear, then super hard materials such as Hardox would have been used.
Garden spades made of stainless are sold as being non stick. They are also far more brittle than their steel counterparts.
In general according to Brinell hardness, 416 stainless is 190-220, with some variants reaching as much as 350. One of the significant differences is that they can't be hardened any further. Materials currently used for plough manufacture wearing parts are usually in the order of 440-460, the significant factor being that this hardness usually takes the form of an outer shell, which allows flexibility due to the softer core. One of the materials alloyed in plough steel is Boron. Whilst used in very small quantities, what it does is allow / promote alignment of molecules during the hardening process.
Not trying to be Devils advocate or one of these
View attachment 502730
Just simply stating facts.
Thinking about it in real terms, if stainless had ever been a viable material, it would have been in use long ago.
Should have had this picture for the thread Ploughing Today