I was at a refinery last year and I saw on the wall one of the best charts that a refiner could wish to have (my opinion of course!) anyway the chart was from 1962 and I could not find who made it as the name was not visible on the chart, only the date and the name Chart of the Metals. So I took a picture and have since entered all of the data into a spreadsheet and I thought it would be nice to share it. If anyone does know the source please let me know, it is not my intent to infringe on copyrighted work but as the date 1962 was plainly visible I think any protection has expired.
View attachment chart of the metals.xlsx
View attachment chart of the metals.xlsx