Dia: 250mm - 1000mm
The length is less than 10 meter;
Weight is less than 25T
The material is 60CrMoV, H13,80Cr2MoV, Gr15,9Cr2Mo, 9Cr2.

Barrel hardness less than 100HSD

making process steel ingot-forging-rough machining-QT-2th rough machining

-induction quenching-finished machining-oiling-packing-delivery