English
Español
русский
Our ASTM A513 Cold Drawn Welded (CDW) Honed & SRB Tubes are precision-
Our ASTM A513 Cold Drawn Welded (CDW) Honed & SRB Tubes are precision-
These tubes combine the cost-effectiveness of welded tubing with high-precision finishing, providing:
·Mirror-like internal bore (Ra ≤ 0.4 μm for honed, Ra ≤ 0.2 μm for SRB)
·Tight dimensional tolerances (H8)
·Excellent straightness for reliable piston travel
Ideal for medium-pressure hydraulic cylinders, industrial machinery, automotive, and agricultural applications where high-quality bore finish is required but seamless tubes are not necessary.
Typical Steel Grades
·ST52 (ASTM A513 Type 5 DOM equivalent)
·SAE 1026 (carbon steel DOM tubing)
·Optional: 1020 or 1025 depending on mechanical requirements
Common Sizes (OD × WT × ID)
·Ø40 mm × 5 mm
·Ø50 mm × 6 mm
·Ø63.5 mm × 6.35 mm
·Ø76 mm × 7 mm
·Ø90 mm × 8 mm
·Ø100 mm × 10 mm
Custom metric and imperial sizes available upon request.
Technical Specifications
·Standard: ASTM A513, Type 5 DOM tubing, Welded (CDW)
·Condition: Cold Drawn + Honed / SRB
·ID Tolerance: H8 (or tighter on request)
·Surface Finish: Ra ≤ 0.4 μm (honed) / Ra ≤ 0.2 μm (SRB)
·Straightness: ≤ 0.3 mm/m
·Roundness: ≤ 0.03 mm
Manufacturing Process
1. Welded Tube Production – ERW from high-quality strip steel
2. Cold Drawing Over Mandrel (DOM) – improves dimensional accuracy and mechanical properties
3. Heat Treatment / Normalization – enhances weld integrity
4. Honing – precise abrasive finishing for Ra ≤ 0.4 μm
5. Skiving & Roller Burnishing (SRB) – optional mirror ID finish Ra ≤ 0.2 μm
6. Inspection – dimensional, straightness, roundness, and surface roughness checks
Key Features & Benefits
·Cost-effective alternative to seamless tubes for medium-pressure cylinders
·High precision H8 tolerances for reliable assembly
·Mirror-like bore finish for extended seal and piston life
·Available in honed or SRB finishes
·Metric and imperial sizes supplied
Applications
·Hydraulic cylinders for construction and agricultural machinery
·Pneumatic cylinder barrels
·Material handling and lifting equipment
·Industrial hydraulic presses
·Automotive and mobile machinery hydraulic systems
QUICK VIEW
Honed & SRB Tube – ASTM A519 ST52 / 20MnV6 / 27SiMn, Mirror ID Finish for Hydraulic Cylinder Barrels
QUICK VIEW
Honed & SRB Tube – EN 10305-2 E355 H8 Ra0.4, Mirror ID Finish for Hydraulic Cylinder Barrels
QUICK VIEW
Honed & SRB Tube – EN 10305-1 E355 H8 Ra0.4, Mirror ID Finish for Hydraulic Cylinder Barrels
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of Honed & SRB Tube – ASTM A513 ST52 / SAE 1026, Welded (CDW), Mirror ID Finish for Hydraulic Cylinder Barrels, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom Honed & SRB Tube – ASTM A513 ST52 / SAE 1026, Welded (CDW), Mirror ID Finish for Hydraulic Cylinder Barrels. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
Established In
Employees
Export Country
Annual Production
When sourcing steel tubes for industrial applications, the standard you specify is just as important as the material grade. ISO, DIN, and ASTM represent three dominant standardization systems used globally — and each r...
Why Conveyor Roller Tubes Fail Prematurely Most conveyor roller failures trace back to two manufacturing deficiencies: insufficient tube straightness and inadequate wear resistance. When either property falls short of s...
A telescopic hydraulic cylinder extends to several times its retracted length by nesting multiple tube stages inside one another. When hydraulic fluid is pumped in, each stage extends in sequence — largest first, smalle...
What Steel Tubes Do in a Hydraulic Shock Absorber In a hydraulic shock absorber, the steel tube is the primary pressure vessel — it contains the hydraulic fluid and guides the piston through its stroke. Without a precis...
