Chrome Plated Hollow Bars (Boru Rod)
Lightweight Seamless Tubular Rods Engineered for High-Pressure Hydraulics and Reduced System Weight
Service overview
Overview
At MCS Hidrolik ve Pnömatik, we supply high-precision hard chrome plated hollow bars (Boru Rod) engineered for applications requiring weight reduction without sacrificing bending strength.
Manufactured from seamless steel tubes, these rods are ideal for telescopic hydraulic cylinders, internal fluid feed lines, and lightweight industrial machinery
Technical Superiority
By combining precision centerless grinding with heavy hard chrome plating, our tubular rods feature exceptional outer diameter tolerances (f7/f8), ultra-smooth surface finish (Ra ≤ 0.2 µm), and outstanding corrosion resistance. The hollow core allows for internal hydraulic routing while substantially lowering overall system weight.
Steel Grades Correspondents
EN | Werkstoff | DIN | B.S. | UNI | JIS | GOST | AISI / SAE / ASTM |
E355 | 1.0580 | St 52 | CFS5 | Fe510 | STKM19A | St6sp | 1524 / 1024 |
P460N | 1.8905 | StE460 | 55C | FeE460KG | - | 18G2AF | - |
20MnV6 | 1.5217 | 20MnV6 | 55M | - | - | - | A572 |
Chemical Composition (in % by Weight)
Steel grade | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | V | N |
E355 | max. 0.22 | max. 0.55 | max. 1.60 | max. 0.025 | max. 0.025 | - | - | - | - | - | - |
P460N | max. 0.20 | max. 0.60 | 1.00 ÷ 1.70 | max. 0.025 | max. 0.020 | max. 0.30 | max. 0.10 | max. 0.80 | max. 0.20 | max. 0.70 | max. 0.020 |
20MnV6 | 0.16 ÷ 0.22 | 0.10 ÷ 0.50 | 1.30 ÷ 1.70 | max. 0.035 | max. 0.035 | - | - | - | 0.08 ÷ 0.20 | - | - |
Mechanical Properties
Steel grade | Tensile strength Rm (N/mm2) | Yield point Rp0.2 (N/mm2) | Elongation (longitudinal) A5 (%) | Impact energy (longitudinal direction) KV2 (J) | Hardness Brinell (N/mm2) | Norm |
E355+SR | min. 580 | min. 450 | min. 10 | (min. 27J / -20°C) ** | min. 175 | EN 10305-1 |
P460N+N | 560 - 730 | min. 460 * | min. 19 | min. 40J / -20°C | 170 - 220 | EN 10216-3 |
20MnV6+N | 550 - 700 | min. 450 | min. 22 | min. 27J / -20°C | 165 - 240 | Technical data according to internal norm |
* The Yield Point value is for information only.
SR = stress-relieved, N = normalized.
* Wall thickness $\le 12\text{ mm}$.
** On request.
*** The hardness values are for information only.
Tubes Rod (Chrome Plated Hollow Bars)
Diameter (mm) | Tolerance (ISO) | Material (DIN) | Weight (kg/m) | Diameter (mm) | Tolerance (ISO) | Material (DIN) | Weight (kg/m) |
30 / 16 | f7 | St 44 | 3.97 | 75 / 55 | f7 | St 44 | 16.02 |
35 / 20 | f7 | St 44 | 6.00 | 80 / 60 | f7 | St 44 | 17.25 |
40 / 25 | f7 | St 44 | 8.62 | 85 / 65 | f7 | St 44 | 18.49 |
45 / 30 | f7 | St 44 | 6.93 | 90 / 60 | f7 | St 44 | 27.73 |
50 / 34 | f7 | St 44 | 9.85 | 100 / 70 | f7 | St 44 | 31.43 |
55 / 35 | f7 | St 44 | 11.09 | 110 / 80 | f7 | St 44 | 35.12 |
60 / 40 | f7 | St 44 | 12.32 | 120 / 80 | f7 | St 44 | 39.50 |
63 / 43 | f7 | St 44 | 11.97 | 125 / 100 | f7 | St 44 | 34.66 |
65 / 45 | f7 | St 44 | 13.55 | 140 / 100 | f7 | St 44 | 59.16 |
70 / 50 | f7 | St 44 | 14.78 | - | - | - | - |
Technical Specifications
Hollow Bar Technical Specifications
Category
Details
Diameter Range (OD / ID)
• From Ø 30/16 mm up to Ø 140/100 mm
• Outer Diameter Tolerances: ISO f7 / f8
• Material: St 44 / E355 / 20MnV5
Chrome Plating & Finish
• Chrome Thickness: 20 µm – 30 µm
• Chrome Surface Hardness: Min. 850 HV 0.1
• Surface Roughness: Ra ≤ 0.2 µm
Diameter Range (OD / ID)
• Tensile Strength (Rm): Min 500 – 800 N/mm²
• Yield Point (ReH): Min 450 N/mm²
• Elongation (A5): Min 10% – 22%
Streamlined Process
Our proven workflow
Step 1
Seamless Tube Selection & Sizing
Step 2
Grinding & Hard Chrome Plating
Step 3
Flaw Check & Export Packaging
Common questions
Frequently asked questions
Get in touch
Have a Custom Design? Request a Precision Quote
Send your technical drawings, STEP/CAD files, or specifications. Our engineering team will review your requirements and respond
with a formal quotation within 24 hours.
You can also email your CAD/PDF drawings directly to us at: export@mcshydraulic.com.tr