What specific barrel material is the saint edge barrel made from?

[bigmanstan]

I've called Springfield and can only get the answer that it is a cmv barrel steel...like most ar 15 barrels. I want to know specifically if the barrel is made from 4140 or 4150 steel and cant find an answer anywhere

 

[xdman]

4150 is only 10 more than 4140 thats not really allot (/joke)

 

[KillerFord1977]

4150 is only 10 more than 4140 thats not really allot (/joke)