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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.
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
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 Alloy Steel Piston Rods – 20MnV6 / 27SiMn, Hard Chrome Plated, Induction Hardened, 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 Alloy Steel Piston Rods – 20MnV6 / 27SiMn, Hard Chrome Plated, Induction Hardened. 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.
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