Chrome Plated Rod

Custom Hard Chrome Rods China Manufacturer & Supplier

shandong sanxiang is a reliable manufacturer specializing in custom hard chrome rods. Our products deliver high precision, excellent wear resistance, and consistent quality. We tailor each rod to your exact specifications, ensuring optimal performance in demanding industrial applications. Whether you require small quantities or large-scale orders, we provide efficient OEM service and timely delivery.

Features of Hard Chrome Plated Rods

• Hard Chrome Coating: Electroplated layer provides superior hardness and excellent wear resistance.

• Corrosion Resistance: Effectively protects the rod from rust and moisture damage.

• High Hardness: Strong resistance to deformation, scratches, and indentation, ensuring structural integrity under stress.

• Smooth Surface Finish: Reduces friction and improves operational efficiency.

• Durability: Designed to withstand high-stress and harsh working environments.

• Precision Manufacturing: Maintains tight dimensional tolerances for consistent fit and reliable performance.

Shandong Sanxiang offers a wide range of chrome solid and hollow rods, available in both stock and custom sizes. With flexible options for length, diameter, and plating thickness, our products meet the needs of hydraulic systems, machinery manufacturing, automotive, and other industries.

Manufactured from premium materials such as CK45, SAE1045, 4140, 20MnV6,40Cr/40X and 42CrMo4/40XM, combined with hard chrome plating and induction hardening processes, our rods deliver excellent wear resistance and strength for demanding applications, ensuring long service life.

All chrome rods comply strictly with international standards including GB, DIN, JIS, GOST, and ASTM. This guarantees precise dimensions and consistent performance across.

Whether you require standard stock items or tailored custom solutions, we provide fast response and professional support to help improve your equipment reliability and operational efficiency.

Applications of Hard Chome Rods

Specifications of Chrome Plated Steel Rod

The Manufacturing Process of Chrome Plated Rods

1. Raw Material Preparation

Material selection:Baokun carefully selected SAE 4140/4340 alloy steel (ASTM A322 ) or ST52 carbon steel (EN 10025 ) to prepare for subsequent processes.

In terms of chemical composition control, a spectrometer is used for real-time monitoring to ensure carbon content ±0.02% and chromium content ±0.15%.

Bar pretreatment:Ultrasonic flaw detection (ASTM E317): detect internal cracks/inclusions (sensitivity 0.4mm flat bottom hole)

Straightening treatment: Fully automatic roller straightening machine, straightness ≤0.1mm/m (ISO 2768-m)

2.Precision centerless grinding

Baokun uses the famous German CNC grinder to ensure grinding accuracy.

Process parameters:

Grinding wheel size: CBN 180# (rough grinding) / 500# (fine grinding)

Feed speed: 0.5-1.2m/min (adjusted according to diameter)

Dimension tolerance: h7 grade (DIN ISO 286), roundness ≤0.005mm

Online detection: Mahr laser diameter gauge, automatically records diameter fluctuations every 20 seconds

3.Induction hardening

Baokun uses professional equipment from the United States. Through precise control of feed rate and quenching, we achieve a uniform hardening process, ensuring that the chrome-plated shaft has high wear resistance and fatigue resistance after induction hardening.

• Induction heating: The surface of the shaft is heated to the quenching temperature (usually 800-850°C) through an induction coil.

• Cooling system: Equipped with a high-pressure spray device (spray pressure 0.2-0.5 MPa), commonly used water-based quenching liquid (PAG solution) or oil cooling system.

• Hardening depth control:Adjust the induction power and frequency according to demand to control the hardening depth (usually 1-3 mm).

– Subsequent treatment: After induction hardening, low-temperature tempering (150-200°C) is required to relieve residual stress.

4. Hard chrome plating

Using proprietary chrome plating solutions, we carefully control every aspect of the chrome plating process. Our advanced ion exchange chrome repair system maintains the quality of the plating solution, ensuring excellent cleanliness and results.

Plating process:

Three-level pulse plating (forward current density 50A/dm², reverse current density 20A/dm²)

Coating structure: micro cracks ≤50/cm (ASTM B456 Class S)

Coating control:

Thickness range: 0.05-0.15mm (segmented control, tolerance ±0.01mm)

Bond strength: thermal shock test (300℃→water cooling, 3 cycles without peeling)

Post-treatment: hydrogen embrittlement elimination (200℃×4h baking, in accordance with AMS 2430)

5.Superfine grinding

Baokun uses the famous Swiss universal grinder to achieve the process goal of surface roughness Ra≤0.1μm (DIN 4768 N5).

Grinding parameters:

Grit size of abrasive belt: diamond abrasive belt 3000#

Line speed: 25m/s, axial feed 0.03mm/r

Coolant: Fully synthetic water-based coolant (pH value 7.5-8.0)

6. Inspection and Packaging

Finally, each chrome bar undergoes rigorous testing to meet our quality standards. Once verified, we safely package the products for delivery, ensuring they arrive at our customers in pristine condition.

Key inspection items:

Coating hardness: Micro Vickers hardness HV0.3 ≥ 850 (ISO 6507)

Corrosion resistance: Neutral salt spray test ≥ 72h no red rust (ASTM B117)

Packaging standards:

Vapor phase anti-rust film (VCI) + heat shrink packaging (IP67 protection grade)

End protection: Engineering plastic sheath (anti-collision damage)

Chrome Rods Packaging Details

To ensure the relialbe protection and quality during transit, we follow a careful packaging process for our hard chrome plated piston rods:

1. Individual Bundles: Each bundle is securely placed in a plastic bag and wrapped with a durable fabric cover, providing an additional layer of protection against damage.

2. Piece Protection: Each piece is either enclosed in a plastic bag or wrapped with a PVC coating, safeguarding against moisture and external contaminants.

3. Carton or Bubble Film Covering: Each package is further protected with a sturdy carton cover or bubble film, ensuring safe handling and transport.

4. Wooden Crate Packaging: For larger orders or delicate items, we utilize a wooden crate to provide maximum protection and stability during shipping.