690

Ground

10,000

2.0 x 10-6

aThe total exposure time of these specimens was less than 10,000 h because they were inserted later than the other alloys.

bAlloy 617 showed evidence of metal dusting after 7,000 h.

aThe total exposure time of these specimens was less than 10,000 h because they were inserted later than the other alloys.

bAlloy 617 showed evidence of metal dusting after 7,000 h.

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