Hello

I inherited an amount of bronze and silver brazing rods. They work OK but
they bear no markings. The bronze flows nicely capillarly (?) and also
can make a smooth concave fillet. Is there some at home, simple way of
determining the type of bronze (manganese, silicon, phosphor?) and of
silver?

Any advice thanked in advance
--

Regards,


Mongke

In article , mongke
wrote:

Hello

I inherited an amount of bronze and silver brazing rods. They work OK but
they bear no markings. The bronze flows nicely capillarly (?) and also
can make a smooth concave fillet. Is there some at home, simple way of
determining the type of bronze (manganese, silicon, phosphor?) and of
silver?

Any advice thanked in advance


Low-fuming bronze will have a white soot from the burnt zinc.
Aluminum bronzes are quite hard and will snap if bent.
Phosphor bronzes will have an irridescent oxide layer with rainbow
colors.

On Thu, 08 Jul 2004 22:24:00 +0000, Ernie Leimkuhler wrote:



I inherited an amount of bronze and silver brazing rods. They work OK
but they bear no markings. The bronze flows nicely capillarly (?) and
also can make a smooth concave fillet. Is there some at home, simple
way of determining the type of bronze (manganese, silicon, phosphor?)
and of silver?

Any advice thanked in advance


Low-fuming bronze will have a white soot from the burnt zinc. Aluminum
bronzes are quite hard and will snap if bent. Phosphor bronzes will have
an irridescent oxide layer with rainbow colors.

Thanks Ernie. That will make them low-fuming bronze. BTW, I take it the
0.3-0.5 % manganese content in low-fuming does not make it manganese
bronze? I read posts in r.c.m about manganese bronze rods being used for
braze welding.

--

Regards,


Mongke

In article , mongke
wrote:

On Thu, 08 Jul 2004 22:24:00 +0000, Ernie Leimkuhler wrote:



I inherited an amount of bronze and silver brazing rods. They work OK
but they bear no markings. The bronze flows nicely capillarly (?) and
also can make a smooth concave fillet. Is there some at home, simple
way of determining the type of bronze (manganese, silicon, phosphor?)
and of silver?

Any advice thanked in advance


Low-fuming bronze will have a white soot from the burnt zinc. Aluminum
bronzes are quite hard and will snap if bent. Phosphor bronzes will have
an irridescent oxide layer with rainbow colors.

Thanks Ernie. That will make them low-fuming bronze. BTW, I take it the
0.3-0.5 % manganese content in low-fuming does not make it manganese
bronze? I read posts in r.c.m about manganese bronze rods being used for
braze welding.


Correct.
Manganese bronze has little if any zinc