You can drop a lit match on a pile of magnesium chips or scrapings and nothing happens, but if you let the magnesium sit with a constant flame it will eventually reach a certain temparature and ignite.

I see magnesium as a means to create a flame that will not extinguish under adverse conditions (windy, wet) but only when added to a fire starter like (Craig's fav) Coghlan's Emergency Tinder, fatwood chips, waxed cotton balls, etc.

At what temparature does magnesium ignite and does the granule size make a difference as to the temparature needed to ignite magnesium?

So what temparature

Oops pressed the wrong button before I was done....Oh well. Thank in advance for any info.....

"The ignition temperature of massive magnesium is very close to its melting point of 650 degrees C (1,202 degrees F). (See Table 2.) However, ignition of magnesium in certain forms may occur at temperatures well below 650 degrees C (1,200 degrees F). For example, magnesium ribbons and shavings can be ignited under certain conditions at about 510 degrees C (950 degrees F), and finely divided magnesium powder can ignite below 482 degrees C (900 degrees F)."