TDS....................................
Yeah..............not sure why they are that hard? I mean it's 1045 after all...............how could there be enough carbon in it? And it's not just a thin crust..........Some hunks I had the hardness was quite deep............1/4"+
1045 has a higher carbon content then even 4140. Not by much. Nonetheless, 1045 doesn’t have all the other alloying elements that make 4140 a much better alloy steel. I grew up as a kid running CNC lathes, and I have personally ran hundreds of thousands of spindles for agricultural equipment from a similar material, 10V45. The V is for a vanadium alloying element. The hot roll bar stock was always sawed about 1/2” off the ends because it was very rarely NOT hard. I always assumed it was because of the way it was cut during the steel mill process, and the ends maybe cooled too quickly? Our 10V45 would usually hardness test at low 10’s HrC. Or as high as 25-34 HrC. But the fact that it can get really hard, not necessarily strong is the same reason 4340 and 4140 can get hard. Carbon content.
My .02
Also why does everyone just love to argue about which way the wind is blowing? I’m 31 years old, and I know most of you are much older then me, yet a lot here act like children.
Sent from my iPhone using Tapatalk