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Our piston rods are precision-manufactured from high-strength steel (45# / 4130) and undergo induction hardening followed by hard chrome plating, providing:
Our piston rods are precision-manufactured from high-strength steel (45# / 4130) and undergo induction hardening followed by hard chrome plating, providing:
Our piston rods are precision-manufactured from high-strength steel (45# / 4130) and undergo induction hardening followed by hard chrome plating, providing:
·Excellent wear resistance
·Corrosion protection
·High surface hardness (HRC 58–62)
·Mirror-like finish for smooth piston travel
Designed for hydraulic and pneumatic cylinders, these rods ensure long service life, minimal friction, and reliable performance in demanding applications.
Typical Steel Grades
·45# Carbon Steel – high strength, good machinability
·4130 Alloy Steel – chromium-molybdenum alloy, higher toughness and fatigue resistance
Other grades are available on request depending on application-specific requirements.
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 are available on request for both metric and imperial sizes.
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: 45# / 4130 steel
·Application: Hydraulic & Pneumatic Cylinder Piston Rods
Manufacturing Process
1. Precision Steel Bar Selection – 45# or 4130 alloy steel
2. Turning / Machining – achieving accurate diameter and surface preparation
3. Induction Hardening – increases surface hardness for wear resistance
4. Hard Chrome Plating – ensures corrosion protection and ultra-smooth finish
5. Grinding & Polishing – final dimensional accuracy and mirror finish
6. Straightening & Inspection – ensures straightness, roundness, and hardness compliance
Key Features & Benefits
·High wear resistance due to induction hardening
·Corrosion protection with hard chrome plating
·High dimensional precision for cylinder assembly
·Mirror-like finish for smooth piston movement
·Available in custom diameters and lengths for any hydraulic or pneumatic application
Applications
·Hydraulic cylinders for construction, agriculture, and industrial machinery
·Pneumatic cylinder rods for automation and robotics
·Mobile machinery, press machines, and lifting equipment
·Heavy-duty and high-pressure cylinders
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 – 45# 4130 Hard Chrome Plated, Induction Hardened Steel Bar, 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 – 45# 4130 Hard Chrome Plated, Induction Hardened Steel Bar. 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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