... & Heat Treatment Abilities Strict Quality Control Prompt Delivery date We are manufacturer and supplier of free forgings, including forged ring, flange, shafts ... .0 ≤10 Block ≤3.5 / Ring ≤4.9 ≤4.0 Cylinder ≤1.5 ≤4.0 5. Certification: ISO9001: 2000, ABS,BV ... /F22/LF2/F1/25CrMo4/42CrMo/17CrNiMo6/347H/304 ASTM DIN high quality Forged Hollows tube, bar,pipe