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spring steel, identification help.

jack hollingsworth
in Knife Making

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G'day, at my work there are a few lengths of "spring steel" flat bar that were left over from a job.. The boss said its 1447 or just "spring steel"... does this sound right to you guys? Ive had a look at this link and others: Steel designations and common steel compositions - British Blades :: Custom Knife Making

would it be 1(plain carbon) 4 (4 alloying elements or is it Molybdenum) and 0.47 percent carbon?
I'm no expert on spark testing but its a whole lot different to mild steel and similar to when i sharpen my chisel (bench grinding).
any thoughts guys? are the numbers a bit mixed up?

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