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Discussion Starter · #1 ·
This afternoon I found myself in front of a gold buyer and just happened to have a few slingshot frames in my gold bag...lol. I visited this same shop before and the same Olympus GoldXpert analyzer was on the buyer's desk... so my frames got tested after the gold transaction.

https://www.olympus-ims.com/en/xrf-xrd/mobile-xrf/goldxpert/?gclid=EAIaIQobChMI5fj-h9343gIVSrnACh1xzw_PEAAYASAAEgJYdvD_BwE

Results (percentages):

Both forks on each frame were tested. Hence, the two sets of results for each frame.

Blue Antelope (not magnetic)

Fe = 74.27 -- 75.29

Cr = 15.29 -- 14.44

Mn = 5.83 -- 5.58

Ni = 2.86 -- 3.08

Cu = 1.75 -- 1.61

Pixiu (magnetic)

Fe = 75.61 -- 75.14

Cr = 15.58 -- 15.78

Ni = 4.92 -- 4.99

Cu = 3.89 -- 3.36

Mn = 0.00 -- 0.73

Small Feihu with pinky-hole (not magnetic)

Fe = 75.00 -- 76.06

Cr = 16.32 -- 15.61

Mn = 5.16 -- 5.28

Ni = 2.69 -- 3.05

Cu = 0.83 -- 0.00

Fe = iron, Cr = chromium, Ni = nickel, Mn = manganese, Cu = copper

The frames are definitely not pot metal zinc but I have no idea on the name for the particular stainless alloys for each frame. Online sources state: "Stainless Steel is a steel alloy with a minimum of 10.5% chromium by mass and a maximum of 1.2% carbon by mass." The above stainless steels have less chromium and nickel than a 304 alloy. A 304 alloy should have 18-20% chromium, 8.0-10.5% nickel, less than 2% manganese and some traces of non-metals. Possibly they are a 400 series stainless.
 

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Interesting, particularly from a safety point of view.

Dankung is a very reliable source for such slingshot frames, assuming that this is where the ones shown actually originate.
 

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Fascinating information not opinion hard and fast facts,Thank you!
 

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Discussion Starter · #5 ·
I was at the gold buyer again this afternoon and had a couple more DanKung frames tested. A test was done on each fork. The numbers on the left are for one fork and the right the other fork.

The Ergo-OTT appears to be a 304 stainless alloy. The Frog frame had no nickel on one fork and only a trace on the other. I'm guessing that the Frog might be some sort of 400 series stainless alloy.

I had 15 stainless frames tested over the last couple of years and the alloys always vary slightly from one fork to the other.

DK Ergonomic OTT Frame

Fe = 71.88 -- 72.88

Cr = 19.56 -- 18.36

Ni = 7.89 -- 8.00

Mn = 0.67 -- 0.24

DK Black Frog Xenomorph

Fe = 79.30 -- 82.37

Cr = 20.70 -- 17.14

Ni = 0.0 -- 0.49
 

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