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Our stainless steel and alloy piston rods are precision-engineered for hydraulic and pneumatic cylinders, offering corrosion resistance, wear protection, and high mechanical strength.
Our stainless steel and alloy piston rods are precision-engineered for hydraulic and pneumatic cylinders, offering corrosion resistance, wear protection, and high mechanical strength.
These rods undergo induction hardening followed by hard chrome plating, delivering:
· Mirror-like ID and OD finish for smooth piston travel
· High surface hardness (HRC 58–62)
· Excellent fatigue and corrosion resistance
Ideal for harsh environments, including offshore, chemical, and food-grade applications.
Typical Steel Grades
·17-4 PH Stainless Steel – high strength, corrosion resistant
·304 / 316 Stainless Steel – excellent corrosion resistance
·Alloy Steel 20MnV6 / 27SiMn – high strength, fatigue-resistant
·Other custom grades available on request
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 metric and imperial standards.
Technical Specifications
·Surface Treatment: Hard Chrome Plating, Ra ≤ 0.2 μm
·Hardness: HRC 58–62 (after induction hardening)
·Straightness: ≤ 0.05 mm/m
·Roundness: ≤ 0.01 mm
·Material: Stainless Steel / Alloy Steel
·Application: Hydraulic & Pneumatic Cylinder Piston Rods
Manufacturing Process
1. High-Grade Steel Bar Selection – stainless or alloy steel
2. Precision Machining – turning, boring, and surface preparation
3. Induction Hardening – enhances surface strength and wear resistance
4. Hard Chrome Plating – provides corrosion protection and smooth finish
5. Grinding & Polishing – achieves mirror-like finish and tight tolerances
6. Final Inspection – verifies roundness, straightness, hardness, and surface finish
Key Features & Benefits
·High corrosion resistance for harsh environments
·Induction hardened for excellent wear resistance
·Mirror finish for smooth piston travel and longer seal life
·HRC 58–62 surface hardness for durability
·Available in custom diameters and lengths for all hydraulic/pneumatic applications
Applications
·Hydraulic cylinders in offshore, chemical, and food processing machinery
·Pneumatic cylinders in automation and robotics
·Heavy-duty lifting equipment and presses
·Mobile machinery in harsh environmental conditions
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 Piston Rod – Stainless Steel / Alloy Steel, 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 Piston Rod – Stainless Steel / Alloy Steel, 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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