1.size:2.0mm-1000mm 2.UT: passed 3.grade:SAE9254,55Cr3,51CrV4,SUP7, ... ,60Si2CrVA,60Si2CrA,60Si2CrA,50CrVA We have been producing the below spring steel bars all the time, and the details is as ... +Quench+ Temper Annealing that you can choose 2) Size: 1.0mm~1000mm 3) Length: 500mm ~12000mm 4) Inspecting: UTS according to ...