Honed & SRB Tube – ASTM A513 ST52 / SAE 1026, Welded (CDW), Mirror ID Finish for Hydraulic Cylinder Barrels

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