C45E Seamless Honed Steel Tube for Hydraulic Cylinder Barrel
Model: CX-HC-02
Brand: CHENGXIN
HS Code: 730441
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Product Overview
Our C45E seamless honed steel tube is a high-precision, cold-drawn seamless mechanical tubing designed for use in hydraulic cylinder barrels, heavy-duty machinery, and industrial equipment. It conforms to ASTM A519 mechanical tubing standards, ensuring excellent dimensional accuracy, surface smoothness, and internal strength to meet the rigorous demands of high-pressure hydraulic systems.
Why Choose C45E for Hydraulic Cylinder Barrel Applications?
Material Grade: EN C45E – medium carbon steel with excellent hardness, wear resistance, and machinability
Application: Ideal for hydraulic cylinder barrel, automotive drive systems, mechanical shafts, and ASTM A519 mechanical tubing grade precision components
Tubes Type: Cold drawn seamless, honed mechanical tubing for use in precision hydraulic assemblies
Specifications
Size Range:
Outer Diameter (OD): 40mm – 580mm
Inner Diameter (ID): 30mm – 500mm
Wall Thickness (WT): Customizable up to 35mm
Manufacturing Standards:
ASTM A519 (SAE1026, SAE1045, 4130, 4140)
EN 10305-1 (C45E, E355, E470)
DIN 2391 (ST52.3, ST52.4)
GB/T 3639 (Q345 series, 16Mn, 27SiMn)
Manufacturing Process:
Cold drawn
Cold rolled
Hydraulic cold drawn
Hot rolled + deep hole boring
Delivery Conditions
+C – Cold rolled
+LC – Cold drawn
+SR – Stress relieved
+A – Annealed
+N – Normalized
Q+T – Quenched + Tempered
Bore Treatment & Precision
Methods: Honing or Skiving & Roller Burnishing (SRB)
Surface Roughness:
Honed: ≤ Ra 0.25μm / Ra 0.35μm
SRB: ≤ Ra 0.25μm
Tolerance Standard: ISO H8
Straightness: ≤ 0.5mm/m
Example of H8 Tolerance Table (ID):
50 < d ≤ 80: 0
120 < d ≤ 180: 0
400 < d ≤ 500: 0
End Finish & Protection
Plain ends, square cut or bevelled
Internal & external anti-rust oil coating
Plastic end caps
Packed in bundles with PVC or woven bags
Custom packing & labeling available
Applications of Seamless Mechanical Tubing
Hydraulic Cylinder Barrels: Ideal for mobile hydraulic systems in excavators, forklifts, cranes, and agricultural machines
Power Transmission Systems: Axles, gear housings, drive shafts
Heavy Machinery & Equipment: Oilfield cylinders, construction and mining equipment
OEM & Machining Workshops: Precision mechanical tubing components
Benefits of CHENGXIN Seamless Mechanical Tubes
Tight dimensional tolerance & H8 standard
Smooth bore finish for optimal hydraulic performance
High strength for pressurized fluid applications
Wide range of seamless mechanical tubing sizes
Customized machining available (welding grooves, CNC cuts)
FAQ – Frequently Asked Questions
Q1: Do your honed tubes meet ASTM A519 mechanical tubing standards?
A: Yes. Our cold drawn seamless tubes fully comply with A519 mechanical tubing specifications for both carbon and alloy steel grades.
Q2: What are the typical seamless mechanical tubing sizes you offer?
A: OD up to 580mm, ID up to 500mm, and wall thicknesses customized up to 35mm depending on structural strength requirements.
Q3: Can I request a specific bore finish like SRB instead of honing?
A: Absolutely. We provide both honing and skiving & roller burnishing options for bore treatment.
Q4: Can I request customized steel grades outside of C45E?
A: Yes, we offer a wide range of alloy and carbon steel grades including ST52, 25CrMo4, 42CrMo4, E355, etc.
Q5: Is OEM marking or branding available for bulk orders?
A: Yes. We support custom logo marking, private label, and packaging solutions.
Company Profile – Leading China Manufacturer of Seamless Mechanical Tubing
Established in 2002, CHENGXIN is a trusted manufacturer of cold drawn seamless tubes, hydraulic honed tubes, and precision mechanical tubing. With over 30,000㎡ of modern factory space and a complete production line—from cold drawing to inspection and packaging—we serve OEMs and distributors globally.
Production Capacity: OD up to 356mm
Certifications: ISO 9001, ISO 14001
Equipment: 2 hydraulic cold drawing benches, 4 chain drawing lines, 2 ERW mills
Regions Served: Southeast Asia, Europe, South America, Middle East
Get a Quote Now
Looking for a reliable supplier of seamless mechanical tubing or C45E hydraulic cylinder barrels with full machining support and international shipping? Contact us now to receive detailed specifications, test reports, or third-party inspection samples.
