Guaranteed delivery time. hot forged heat-treatment(N,Q+T,A) process:EAF+LF+VD test :chemical,UT,physical test.et. Material: Carbon steel & alloy steel. 20SiMnVB/25MnTiBXt/38CrSi OD(max):800mm, length(max): 2000mm. Supply condition: Rough machined, normalzied & QT.The cylinders are used for chemical industry, hydraulic pressure products, port and shipping driving machines and so on. And it made ...