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Old 22-02-2016, 12:03   #1
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Which bronze?

My morgan 30-1 has a swinging centerboard with a bronze "pin". The pin is cracking and worn down a lot.

Should I use Phos Bronze, Aluminum Bronze or Silicon Bronze to replace it?
http://metalsupermarkets.com/blog/di...-brass-bronze/

Phosphor Bronze (or Tin Bronze)
This alloy typically has a tin content ranging from 0.5% to 1.0%, and a phosphorous range of 0.01% to 0.35%. These alloys are notable for their toughness, strength, low coefficient of friction, high fatigue resistance, and fine grain. The tin content increases the corrosion resistance and tensile strength, while the phosphorous content increases the wear resistance and stiffness. Some typical end uses for this product would be electrical products, bellows, springs, washers, corrosion resistant equipment.

Silicon Bronze
This is an alloy that can cover both brass and bronze (red silicon brasses and red silicon bronzes). They typically contain 20% zinc and 6% silicon. Red brass has high strength and corrosion resistance and is commonly used for valve stems. Red bronze is very similar but it has lower concentrations of zinc. It is commonly used in the manufacturing of pump and valve components.

Aluminum Bronze
This has an aluminum content range of 6% 12%, an iron content of 6% (max), and a nickel content of 6% (max). These combined additives provide increased strength, combined with excellent resistance to corrosion and wear. This material is commonly used in the manufacturing of marine hardware, sleeve bearings and pumps or valves that handle corrosive fluids.
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Old 22-02-2016, 12:29   #2
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Re: Which bronze?

Quote:
Originally Posted by allanbranch View Post

Silicon Bronze
This is an alloy that can cover both brass and bronze (red silicon brasses and red silicon bronzes). They typically contain 20% zinc and 6% silicon. Red brass has high strength and corrosion resistance and is commonly used for valve stems. Red bronze is very similar but it has lower concentrations of zinc. It is commonly used in the manufacturing of pump and valve components.
Dunno where did you find that piece of information?

Quote from Wikipedia "Silicon bronze has a composition of Si: 2.80-3.80%, Mn: 0.50-1.30%, Fe: 0.80% max., Zn: 1.50% max., Pb: 0.05% max., Cu: balance"

My choice

BR Teddy
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Old 22-02-2016, 12:33   #3
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Re: Which bronze?

Hi TD, that info came from the link in the original post.

http://metalsupermarkets.com/blog/di...-brass-bronze/

---

1 vote for silicon bronze, thanks!
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Old 22-02-2016, 12:36   #4
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Re: Which bronze?

Quote:
Originally Posted by allanbranch View Post
My morgan 30-1 has a swinging centerboard with a bronze "pin". The pin is cracking and worn down a lot.

Should I use Phos Bronze, Aluminum Bronze or Silicon Bronze to replace it?
http://metalsupermarkets.com/blog/di...-brass-bronze/

Phosphor Bronze (or Tin Bronze)
This alloy typically has a tin content ranging from 0.5% to 1.0%, and a phosphorous range of 0.01% to 0.35%. These alloys are notable for their toughness, strength, low coefficient of friction, high fatigue resistance, and fine grain. The tin content increases the corrosion resistance and tensile strength, while the phosphorous content increases the wear resistance and stiffness. Some typical end uses for this product would be electrical products, bellows, springs, washers, corrosion resistant equipment.

Silicon Bronze
This is an alloy that can cover both brass and bronze (red silicon brasses and red silicon bronzes). They typically contain 20% zinc and 6% silicon. Red brass has high strength and corrosion resistance and is commonly used for valve stems. Red bronze is very similar but it has lower concentrations of zinc. It is commonly used in the manufacturing of pump and valve components.

Aluminum Bronze
This has an aluminum content range of 6% 12%, an iron content of 6% (max), and a nickel content of 6% (max). These combined additives provide increased strength, combined with excellent resistance to corrosion and wear. This material is commonly used in the manufacturing of marine hardware, sleeve bearings and pumps or valves that handle corrosive fluids.
For marine applications to be used in a salt water environment, you should use CuSn10Zn aka "RG10" bronze. / Petter
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Old 22-02-2016, 12:45   #5
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Re: Which bronze?

Isn't that a Phosphor Bronze? (per me googling and trying to figure this out.)
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