Test results are in! For those who have missed it there was a big controversy about Scratch Golf's advertising claims that spanned across multiple forum's and blog websites. Here were the claims I made against Scratch Golf last week:
1. It was my opinion that they did not use 1018 carbon steel for their Irons & Wedges
2. Scratch Golf claims Forged by Ishihara-Shoten yet Ishihara-Shoten doesn't forge golf clubs
3. ( TSG ) wedge was not Ishihara Forged or made of 1018 as we were led to believe
4. Scratch is using Open Model Blanks dispite claiming their products are Original Designs
Let's get right to it with the Test Results! I sent in 6 sample heads to METL. Metals Engineering and Testing Laboratory based out of Phoenix, Arizona. Here is a short blurb on what they do for their customers...
We submitted sample heads from popular brands like Mizuno, Epon, Miura Giken, Geotech and Scratch Golf. Click "Read More" to continue on for the test results...
We submitted 2 heads in total from Scratch Golf, one 1018 wedge and one EZ-1 cavity back iron. From Epon we sent in the AF-Tour, Mizuno MP-67, and Miura Giken the CB2006 model.
In regards to testing, heat treatment and plating make no difference at all in the test results as the testing finds the chemical and mineral balance deep inside the head. The above are UNS standards not JIS, the difference between the two is that JIS standards hold tighter tolerance on the minerals and chemicals. The carbon rating is not the only thing to look at, there is a range of other minerals that need to fall into a tolorence allowing METL to come to the conclusion as stated at the bottom of the test.
There is no room for question due to any overlap's in minerals. If it says 1020 it's 1020 by UNS Standards. If it says 1010 it's 1010 by UNS standards.
When cross referencing the UNS results with JIS, The 1020 UNS in the the EZ-1 iron falls near the minimum requirements of JIS S25C. While the UNS rated 1010 doesn't have the acceptable tolerance to meet JIS standards. By both UNS & JIS standards of the two Scratch Samples sent in none of them are using 1018 steel.
But why that 1010 conclusion on the 1018 wedge? It would have to be an EXTREMELY poor quality piece of metal skipping from 1018 past 1017, 1015, 1012 into the 1010 range. I don't know if this is a freak wedge but it doesn't meet any countries standards if it's supposed to be 1018. It's 4 carbon metal designations apart from what it was advertised to be. That is surprisingly bad if it was supposed to be 1018 even by China's metal standards.
In regards to the Mizuno, Miura Giken, and Epon product checkout the chart below...
When looking at JIS standards the Mizuno and Miura Giken are right on the edge of S20/S25C which makes complete sense as this is what they advertise and the Epon AF-Tour is right where it should be for S20C like Epon advertises.
The Scratch EZ-1 Iron also fell pretty close to being able to fit into the S25C category. The only surprise out all of these heads was the 1010 Scratch Wedge head. I will let you guy's draw your on conclusions on the test results... Whatever the case I now know for a fact that of both Scratch Golf heads submitted for metallurgy testing none of them are 1018.
I requested the destroyed heads returned to us so we could take pictures. The results just got back to us today via Email we also have the data listed next to the picture of the club head via METL for those who want to question the test.