PAM382 - bronze composition

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PAM382 - bronze composition

shafikzaman
Paneristi
Joined: August 7th, 2010, 1:15 pm

April 1st, 2012, 10:33 am #1

Generally, bronze consists of 88% copper and 12% tin.
Having done some limited reading on bronze, the main thing that sticks in my head is that steel is stronger and harder than bronze and keeps edges sharp for longer.
This is a given and in no way diminishes the appeal of the 382 to me.
However, out of curiosity, does anyone know if there's any information on the make-up of Panerai's bronze per se?
With OP's track record of extensive R&D, is it possible they may have found a 'superior' mix for the Bronzo?
Hopefully there are some metallurgists amongst the risti who might be able to shed some light on the matter.
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BauerR
Paneristi
BauerR
Paneristi
Joined: January 27th, 2011, 5:16 pm

April 1st, 2012, 12:14 pm #2


Silicon Bronze
Silicon Bronze is a high-strength, highly corrosion resistant material with nonmagnetic properties. It is generally as strong as steel. Because of its composition, it is more difficult to machine. However, it is excellent for use in general marine applications, as well as pumps and boilers. Silicon Bronze, C655
Minimum Properties Ultimate Tensile Strength, psi 85,000
Yield Strength, psi 55,000
Elongation in 2" 20%
Rockwell Hardness B90
Chemistry Copper (Cu) 97.0% min
Iron (Fe) 0.8% max
Manganese (Mn) 1.5% max
Nickel (Ni) 0.6% max
Lead (Pb) 0.5% max
Silicon (Si) 2.8 - 3.8%
Zinc (Zn) 1.5% max


____________________________________________
25A & 380N for now...


Others:
Breitling Superocean Steelfish
Tag Heuer Formula 1
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shafikzaman
Paneristi
Joined: August 7th, 2010, 1:15 pm

April 1st, 2012, 1:07 pm #3

Thanks for sharing Bauer - that's both very informative and reassuring
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TokyoSkier
Paneristi
Joined: December 1st, 2011, 1:08 pm

April 1st, 2012, 1:19 pm #4

Silicon Bronze
Silicon Bronze is a high-strength, highly corrosion resistant material with nonmagnetic properties. It is generally as strong as steel. Because of its composition, it is more difficult to machine. However, it is excellent for use in general marine applications, as well as pumps and boilers. Silicon Bronze, C655
Minimum Properties Ultimate Tensile Strength, psi 85,000
Yield Strength, psi 55,000
Elongation in 2" 20%
Rockwell Hardness B90
Chemistry Copper (Cu) 97.0% min
Iron (Fe) 0.8% max
Manganese (Mn) 1.5% max
Nickel (Ni) 0.6% max
Lead (Pb) 0.5% max
Silicon (Si) 2.8 - 3.8%
Zinc (Zn) 1.5% max


____________________________________________
25A & 380N for now...


Others:
Breitling Superocean Steelfish
Tag Heuer Formula 1
And great question in the first place! Have tried a 382 on and was very impressed!
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shafikzaman
Paneristi
Joined: August 7th, 2010, 1:15 pm

April 1st, 2012, 1:27 pm #5

Silicon Bronze
Silicon Bronze is a high-strength, highly corrosion resistant material with nonmagnetic properties. It is generally as strong as steel. Because of its composition, it is more difficult to machine. However, it is excellent for use in general marine applications, as well as pumps and boilers. Silicon Bronze, C655
Minimum Properties Ultimate Tensile Strength, psi 85,000
Yield Strength, psi 55,000
Elongation in 2" 20%
Rockwell Hardness B90
Chemistry Copper (Cu) 97.0% min
Iron (Fe) 0.8% max
Manganese (Mn) 1.5% max
Nickel (Ni) 0.6% max
Lead (Pb) 0.5% max
Silicon (Si) 2.8 - 3.8%
Zinc (Zn) 1.5% max


____________________________________________
25A & 380N for now...


Others:
Breitling Superocean Steelfish
Tag Heuer Formula 1
This brand is truly absorbing and keeps drawing you in deeper!
Best thing is with this site - we get to share our madness : )
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shafikzaman
Paneristi
Joined: August 7th, 2010, 1:15 pm

April 1st, 2012, 1:31 pm #6

And great question in the first place! Have tried a 382 on and was very impressed!
Thanks Eric - the 382 is truly an amazing watch and I guess we'll get to know more about it as it ages with us on here : )
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mnm222876
Paneristi
Joined: February 12th, 2006, 3:46 am

April 1st, 2012, 3:28 pm #7

Silicon Bronze
Silicon Bronze is a high-strength, highly corrosion resistant material with nonmagnetic properties. It is generally as strong as steel. Because of its composition, it is more difficult to machine. However, it is excellent for use in general marine applications, as well as pumps and boilers. Silicon Bronze, C655
Minimum Properties Ultimate Tensile Strength, psi 85,000
Yield Strength, psi 55,000
Elongation in 2" 20%
Rockwell Hardness B90
Chemistry Copper (Cu) 97.0% min
Iron (Fe) 0.8% max
Manganese (Mn) 1.5% max
Nickel (Ni) 0.6% max
Lead (Pb) 0.5% max
Silicon (Si) 2.8 - 3.8%
Zinc (Zn) 1.5% max


____________________________________________
25A & 380N for now...


Others:
Breitling Superocean Steelfish
Tag Heuer Formula 1
The 382 is CnSn8 Phosphor Bronze, or JIS C5210 / C52100.


Max / Seattle
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kftman
Paneristi
kftman
Paneristi
Joined: June 7th, 2004, 10:25 pm

April 1st, 2012, 3:34 pm #8

Generally, bronze consists of 88% copper and 12% tin.
Having done some limited reading on bronze, the main thing that sticks in my head is that steel is stronger and harder than bronze and keeps edges sharp for longer.
This is a given and in no way diminishes the appeal of the 382 to me.
However, out of curiosity, does anyone know if there's any information on the make-up of Panerai's bronze per se?
With OP's track record of extensive R&D, is it possible they may have found a 'superior' mix for the Bronzo?
Hopefully there are some metallurgists amongst the risti who might be able to shed some light on the matter.
____
MK
______
Mark K
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kftman
Paneristi
kftman
Paneristi
Joined: June 7th, 2004, 10:25 pm

April 1st, 2012, 3:35 pm #9



____
MK
______
Mark K
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shafikzaman
Paneristi
Joined: August 7th, 2010, 1:15 pm

April 2nd, 2012, 12:43 am #10

The 382 is CnSn8 Phosphor Bronze, or JIS C5210 / C52100.


Max / Seattle
Max / Mark - thanks for your thoughts - is there any way to verify this?
Based on a quick search, 316L stainless steel is 140 VPN (Vickers Pyramid Number) vs 80 VPN (max) for phosphor bronze grade 1.
I guess what this means in plain english is that if OP used grade 1 phosphor bronze on the 382, then it should really be less prone to scratches compared to stainless steel models right?
In any case, the Bronzo is awesome!
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mnm222876
Paneristi
Joined: February 12th, 2006, 3:46 am

April 2nd, 2012, 6:44 am #11

Panerai stated this in the 382 press release. It's not debatable, it's fact.



Max / Seattle
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shafikzaman
Paneristi
Joined: August 7th, 2010, 1:15 pm

April 2nd, 2012, 10:29 am #12

Pardon my ignorance Max . . . and thanks again for the info - I'll be sure to look up the 382 press release
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