Steel round rod

for machiningfor general purposeshigh-strength

Product Overview
The 42CrMo Chrome Plated Rod Normalized (HRC 15–22) is a high-strength piston rod designed for demanding hydraulic and pneumatic applications. Manufactured from 42CrMo alloy steel and normalized to a controlled hardness of HRC 15–22, it balances toughness and machinability. The hard chrome plating provides a mirror-like surface, high wear resistance and improved corrosion protection, suitable for hydraulic cylinder manufacturers, distributors and engineering companies.

Model & Basic Information

• Model: Normalized
• Brand: EAST AI
• Material: 42CrMo4
• Length: Max. 15m
• ID Tolerance: f7 / f8 / g6
• Straightness: ≤0.2/1000 mm
• Application: Hydraulic cylinders for mobile equipment, industrial machinery and heavy-duty systems
• Packing: Anti-rust oil on rod surface; each rod packed in paper roll and wooden case; customizable
• Roughness: ≤0.2 μm

Product Advantages

• Excellent mechanical properties: 42CrMo alloy steel delivers higher tensile and yield strength than standard carbon steels.
• Controlled hardness range: Normalization ensures stable HRC 15–22 for machining and hydraulic use.
• Superior corrosion resistance: Thick hard chrome layer prevents rust in harsh environments.
• High surface quality: Mirror-like finish reduces friction and extends seal life.
• Easy machinability: Normalized condition facilitates cutting, drilling and welding compared with quenched & tempered rods.
• Stable supply: Standard sizes and customizable lengths support distributors and engineering projects.

Production Process

• Raw material selection: Certified 42CrMo alloy steel.
• Cutting & straightening: Bars cut to length and straightened to tolerance.
• Normalization treatment: Heat treatment to achieve HRC 15–22.
• Peeling or grinding: Remove surface defects to reach dimensional accuracy.
• Polishing: Fine polish before plating.
• Chrome plating: Uniform hard chrome layer with high adhesion.
• Final straightening: Re-straightening to tight tolerances.
• Inspection & testing: Dimensional, surface and hardness checks on every rod.

Application Fields

• Hydraulic cylinders: Construction machinery, cranes, mining equipment.
• Pneumatic cylinders: High-performance actuators for automation.
• Agricultural machinery: Tractors, harvesters, loaders.
• Industrial equipment: Presses, injection molding machines.
• Marine applications: Offshore equipment requiring high corrosion resistance.
• Material handling: Forklifts and lifting platforms.

Product Details
Material Grade — 42CrMo alloy steel
Surface Treatment — Hard chrome plated
Hardness Range — HRC 15–22 (Normalized)
Surface Roughness — Ra ≤ 0.2 μm
Chrome Layer Thickness — 20–30 μm (customizable)
Tolerance — f7, f8, h6 available
Straightness — ≤ 0.2 mm/m (≤ 0.2/1000 mm)
Length — Max. 15 m (custom lengths on request)
Diameter Range — Ø 10 mm – Ø 500 mm
Salt spray resistance — 96–120 hours

Characteristics / Technical specifications

• Material: 42CrMo4 alloy steel
• Normalized heat treatment producing HRC 15–22 for balanced toughness and machinability
• Hard chrome plating for wear resistance and corrosion protection
• Surface finish: Ra ≤ 0.2 μm (mirror-like)
• Chrome layer thickness: typically 20–30 μm (customizable)
• Tolerances available: f7, f8, h6 (ID options)
• Straightness tolerance: ≤ 0.2 mm/m (≤ 0.2/1000 mm)
• Diameter range: Ø 10 mm – Ø 500 mm
• Length: Max. 15 m (custom options available)
• Salt spray resistance: 96–120 hours (indicative)
• Quality controls: dimensional inspection, hardness testing, surface roughness and chrome thickness measurement, ultrasonic flaw detection