China Cold Drawn St52 4140 Steel Bright Hollow

Name: Cold drawn aisi4140 st52 steel bright hollow
Company profile
We are the manufacturer specialized in machining heavy duty forging parts for nearly 18 years.Our products, such as drive shaft, Forging Hollow Shaft, Shaft Sleeve, Eccentric shaft, Forging rod, Large bolt, Heavy Duty Hydraulic Cylinder, are widely used in coiled material, petroleum, metallurgy, mine, machinery and transportation industry. etc.
Description:
Forged sleeve are use in industry, such as forging equipment; power plant equipment; hydraulic equipment; rolling mill equipment; petroleum machinery, etc.
The production process as "EF + (LF) + (VD) + ESR + forging and annealing (or normalizing) + heat treatment (quenching and tempering) + Machining + packaging + delivery. "
Quality control: chemical analysis, optical spectrum instrument, Mechanical properties for tensile strength, yield stress and elongation. Hardness testing, impact testing, coordinate measuring machine (CMM), metallographic analysis, magnetic flaw detector, Ultrasonic flaw detector.
Product List

NameTechniqueMaterialDia/mm
Wall thickness
Length/mmForging shaftForging+turning+grindingalloy steel
carbon steel
stainless steel
200-800----500-20000Hollow shaftForging+drilling+turning150-800≥15mm≤17000Shaft sleeveForge+drill & bore+turning +milling400-700≥15mm≤18000Large boltRolled/forge+turning+threading300-800----≤17000Hydraulic cylinderForging+drill & bore+ turning300-2000≥10mm≤10000Other parts in deep-holeForge+ drill & bore+turning+mill300-2000----≤20000

Forged steel hollow