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4140 Chrome Plated Rod Induction And Hardened (HRC 50-62)

The 4140 Chrome Plated Rod – Induction Hardened (HRC 50–62) is a premium high-strength piston rod manufactured from 4140 alloy steel (equivalent to 42CrMo4). Designed for the most demanding hydraulic and mechanical applications, this rod offers exceptional hardness, wear resistance, corrosion protection, and impact strength.
A two-step enhancement is applied:
Induction Hardening increases surface hardness to HRC 50–62, improving fatigue strength and resistance to bending, impact, and mechanical stress.
Hard Chrome Plating (20–30 μm) provides a smooth, corrosion-resistant, low-friction surface suitable for hydraulic sealing systems.
The result is a high-performance piston rod ideal for heavy-duty hydraulic cylinders, construction machinery, lifting systems, mining equipment, and industrial automation requiring maximum durability and long service life.

  • Model:Induction And Hardened

  • Brand:EAST AI

  • Material:4140

  • Length:max 15m

  • Application:Hydraulic cylinders for mobile equipment, industrial machinery, and heavy-duty systems

  • Packing:Anti rust oil to be spread on rod surface and each rod to be packed in paper roll and then in wooden case,can be customised according to customer requirements

  • Roughness:Ra≤0.2u

Product Description

Key Features of 4140 Chrome Plated Rod Induction Hardened (HRC 50–62)

Superior Alloy Steel – 4140 / 42CrMo4

4140 alloy steel delivers:

  • High tensile strength

  • Excellent fatigue resistance

  • Good ductility and toughness

  • Strong performance under variable loads

Induction Hardened Surface (HRC 50–62)

The rod surface undergoes induction hardening, reaching HRC 50–62, significantly improving:

  • Wear resistance

  • Bending and impact resistance

  • Fatigue life under high stress

  • Resistance to scoring and pitting

Hard Chrome Plating

The chrome layer offers:

  • Low surface roughness (Ra ≤ 0.2 μm)

  • Excellent corrosion protection

  • Smooth movement inside hydraulic seals

  • High resistance to abrasion

Precision Ground & Polished

Manufactured with high-precision equipment to ensure:

  • Accurate tolerances (f7 / f8 / g6 available)

  • Excellent straightness

  • Mirror-like finish

Long Service Life

Ideal for applications where repeated heavy loads, high pressure, and harsh environments require strong and durable components.


Applications of 4140 Chrome Plated Rod Induction Hardened (HRC 50–62)

The rod is engineered for high-demand industries that require superior strength and wear resistance:

Hydraulic Cylinder Piston Rods

  • Excavators

  • Loaders

  • Backhoe machines

  • Mining hydraulics

  • Industrial hydraulic presses

Construction & Heavy-Duty Machinery

  • Cranes

  • Bulldozers

  • Drilling rigs

  • Tunneling machinery

Agriculture & Forestry Equipment

  • Harvesters

  • Log splitters

  • Tractor hydraulic systems

Material Handling & Lifting Equipment

  • Forklifts

  • Aerial platforms

  • Lifting cranes

  • Telescopic boom cylinders

Industrial Automation

  • Linear actuators

  • Precision mechanical shafts

  • High-frequency reciprocating systems


Technical Specifications – 4140 Chrome Plated Rod Induction Hardened (HRC 50–62)

Item

Specification

Material Grade

4140 Alloy Steel (42CrMo4 / SCM440 equivalent)

Surface Treatment

Hard Chrome Plated

Induction Hardened Hardness

HRC 50–62

Core Hardness

HRC 28–35

Surface Hardness

850–1050 HV

Chrome Thickness

20–30 μm (customizable)

Surface Roughness

Ra ≤ 0.2 μm

Diameter Tolerance

f7, g6, h7 (optional)

Straightness

≤ 0.2 mm / 1m

Yield Strength

≥ 850 MPa

Tensile Strength

1000–1200 MPa

Standard Lengths

1–8 meters (custom lengths available)

Surface Process

Precision grinding + polishing + chrome plating

Features

High strength, wear-resistant, corrosion-resistant

Machining Options

Threading, drilling, chamfering, end machining


Why Choose 4140 Chrome Plated Rod Induction Hardened (HRC 50–62)?

1. Much Higher Strength Than CK45 or ST52

4140 alloy steel offers superior mechanical properties and longer service life.

2. Induction Hardened Layer Improves Durability

  • Resistance to wear

  • Less bending

  • Better impact resistance

  • Improved fatigue strength

Ideal for extreme working conditions.

3. Premium Chrome Surface

The uniform chrome layer protects against:

  • Corrosion

  • Abrasion

  • Chemical exposure

  • Seal wear

4. Lower Maintenance Cost

The rod resists damage, reducing cylinder repair and replacement frequency.

5. Built for High-Pressure Systems

With high yield strength and a hardened surface, the rod performs reliably in high-pressure hydraulic cylinders.


Product Advantages at a Glance

  • High strength alloy steel (4140)

  • Induction hardened HRC 50–62

  • Smooth chrome plated finish

  • Superior load-bearing capacity

  • Long operational life

  • Excellent straightness and dimensional accuracy

  • Suitable for demanding outdoor and industrial environments


Quality Control – 4140 Chrome Plated Rod

Every rod undergoes the following tests:

✔ Ultrasonic flaw detection✔ Hardness test (HRC verification)✔ Chrome thickness test✔ Salt spray corrosion test✔ Surface roughness test✔ Dimensional tolerance check✔ Straightness verification

We guarantee stable mechanical properties and minimum defect rates.


Customization Options

We offer full customization based on your requirements:

  • Custom diameter (φ 8–200 mm)

  • Special tolerance classes (g6 / h7)

  • Extra-thick chrome plating

  • Cut-to-length or long-length rods

  • End machining (threading, turning, drilling)

  • Special packaging for export

Send your drawings, and we can produce based on OEM or tailored specifications.


Ordering Information – 4140 Chrome Plated Rod Induction Hardened (HRC 50–62)

To receive a quotation, please provide:

  1. Diameter

  2. Length

  3. Quantity

  4. Tolerance requirement

  5. Chrome thickness

  6. Any machining details

Our engineering and sales team will respond with price, delivery time, and export solutions.


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