Alloy Steel Piston Rods – 20MnV6 / 27SiMn, Hard Chrome Plated, Induction Hardened, Ø[OD] x [Length]mm

Our Alloy Steel Piston Rods are manufactured from high-strength 20MnV6 or 27SiMn steel, then induction hardened and hard chrome plated to deliver long-lasting, wear-resistant, and corrosion-protected rods.

These rods are ideal for hydraulic and pneumatic cylinders in heavy-duty industrial, mobile machinery, and construction applications. They provide:

·Mirror-like surface finish (Ra ≤ 0.2 μm)
·High surface hardness (HRC 58–62)
·Excellent fatigue and wear resistance
·High dimensional precision (H8 tolerance)

 Typical Steel Grades

·20MnV6 – low-alloy steel with excellent toughness, fatigue resistance, and hardenability
·27SiMn – higher strength alloy steel, ideal for heavy-duty piston rods with superior wear resistance

Other optional grades: 45# Carbon Steel, 4130 Chromium-Molybdenum Steel, Stainless Steel 17-4PH / 304 / 316

Common Sizes (Diameter × Length)

·Ø20 mm × 500 mm
·Ø25 mm × 1000 mm
·Ø32 mm × 1500 mm
·Ø40 mm × 2000 mm
·Ø50 mm × 3000 mm

Custom diameters and lengths available for both metric and imperial standards

 Technical Specifications

·Surface Treatment: Hard Chrome Plating, Ra ≤ 0.2 μm
·Hardness: HRC 58–62 (induction hardened)
·Straightness: ≤ 0.05 mm/m
·Roundness: ≤ 0.01 mm
·Material: 20MnV6 / 27SiMn alloy steel
·Application: Hydraulic & Pneumatic Cylinder Piston Rods

 Manufacturing Process

1. Steel Bar Selection – 20MnV6 or 27SiMn alloy steel
2. Turning & Machining – precise diameter and surface prep
3. Induction Hardening – increases surface hardness for wear resistance
4. Hard Chrome Plating – protects against corrosion and reduces friction
5. Grinding & Polishing – ensures mirror finish and H8 tolerance
6. Final Inspection – verifies hardness, straightness, roundness, and surface finish

 Key Features & Benefits

·High-strength alloy steel for heavy-duty applications
·Mirror finish for smooth piston travel and long seal life
·Induction hardened surface for wear resistance
·High precision H8 tolerance for reliable cylinder assembly
·Customizable sizes in metric and imperial units

 Applications

·Hydraulic cylinders for construction, agriculture, and industrial machinery
·Pneumatic cylinders in automation and robotics
·Heavy-duty lifting equipment and presses
·Mobile machinery, mining, and high-stress hydraulic systems