Ignition temps of Subs?

[Darkgael]

Just curious...does anyone know the ignition temperatures of Pyrodex and/or 777? BP?
Thanks,
Pete

 

[roundball]

Just curious...does anyone know the ignition temperatures of Pyrodex and/or 777? BP?
Thanks,
Pete

Seems like I've read 600-700-ish somewhere...you might check Hodgdon's website

 

[irataylor]

Pyrodex ignition temp is 740
777 ignition temp is 770

 

[BigDave]

Black powder lowest temp: ~ 300 C, or 576 F
(varies slightly based on formula differences)

The interesting thing is that the subs are so high sulfurless bp is in the same range.
Sulfurless BP: ~400C, or 755 F.
(sulfur is in bp mainly to lower the ignition temperature)
I might just make up a batch and test it.
Sulfurless BP wouldn't smell like BP, but then it would have much less fouling since 80% of the smoke and residue in BP is from the sulfur.

BigDave

Ahh... I just searched old posts and found 777 is sulfurless BP spiked with a bit of perchlorate to increase it's power, and pyrodex is basicly a reduced sulfer BP spiked with perchlorate to increase power. That makes sense based on the power and ignition temps.

 

[mykeal]

Black powder lowest temp: ~ 300 C, or 576 F
(varies slightly based on formula differences)

The interesting thing is that the subs are so high sulfurless bp is in the same range.
Sulfurless BP: ~400C, or 755 F.
(sulfur is in bp mainly to lower the ignition temperature)
I might just make up a batch and test it.
Sulfurless BP wouldn't smell like BP, but then it would have much less fouling since 80% of the smoke and residue in BP is from the sulfur.

BigDave

Ahh... I just searched old posts and found 777 is sulfurless BP spiked with a bit of perchlorate to increase it's power, and pyrodex is basicly a reduced sulfer BP spiked with perchlorate to increase power. That makes sense based on the power and ignition temps.

Big Dave - thanks for the post. Where did you get your information?

 

[BigDave]

Ulrich Bretschner's web site, the MSDS's for 777 and Pyrodex, and general experience with fireworks compositions.

Ulrich Bretscher's Black Powder Page

Note: You can pretty much ignore the graphite listed in the msds's, it's just a light surface coat to help the powder flow better and look prettier.