Special steel of Hollow forgings 

Steel Grade: S45C, 42CrMo4(we can do according your inquiry), SAE8620
Hollow Forging: 1000mm OD X 790mm ID X 2000mm(About size we can according your request)
Delivery condition: Hot forged+normalized+temper+rough machined.
Origin: China
UT: 6MMFBH  Sep1921 Class C/c.

Properties:
Yield=310 Mpa Minimum; Tensile=600 Mpa minimum; %EI=13min
Surface Hardness=BHN160-220
Process: Forged from vacuum degassed ingots.