Schulz Hartchrom GmbH Hamburg, Germany

Schulz Metallveredelung GmbH HamburgHartverchromte Kolbenstangen und RohreKolbenstangenvideo

Welcome to the internet portal of Schulz Hartchrom GmbH.
Our company with headquarter in Hamburg has been among the leading surface finishers for over 65 years.

We focus on the complete production of hard chromium plated chrome bars and tubes in large series.

We look forward to your visit on our Internet pages and are gladly at your service for personal consultation.

Stephan Schulz, CEO

Also take a look at the pages of Schulz Metallveredelung GmbH, where we would like to introduce our additional services in the field of surface finishing and metal processing.

Product range chrome bars and tubes

  Chrome bars Chrome tubes Nickel-plated
chrome bars and tubes
Hardened chrome bars
Diameters 20-100mm 20-100mm 20-150mm 20-100mm
Length min 5.000 mm 5.000 mm 200 mm 5.000 mm
Length max 6.800 mm 6.800 mm 2.000 mm 6.800 mm
Material C45 R, 20MnV6
+ 42CRM04 and similar
St 52 and similar C45 R, 20MnV6,
St 52 and similar
C45 R and similar
Layer thickness Cr 25 µm +5 Cr 25 µm +5 Ni 25 µm +,
Cr 25 µm +5
Cr 25 µm +5
Tolerance ISO 7 ISO 7 ISO 7 ISO 7
Surface roughness R max ≤ 2 R max ≤ 2 R max ≤ 2 R max ≤ 2
Roundness ½ tolerance ½ tolerance ½ tolerance ½ tolerance
Percentage contact area Mr ≥ 50 % Mr ≥ 50 % Mr ≥ 50 % Mr ≥ 50 %
Mikrocracks/cm 300 – 600 300 – 600 300 – 600 300 – 600
Hardness (HV, HRC) ≥ 900, ≥ 65 ≥ 900, ≥ 65 ≥ 900, ≥ 65 ≥ 900, ≥ 65
Straitness (mm/m) ≤ 0,1/1.000 ≤ 0,1/1.000 ≤ 0,1/1.000 ≤ 0,1/1.000
Corrosion resistance
(ISO 9227)
100 h/200 h 100 h/200 h 1000 h 100 h/200 h
Rating
(ISO 10289)
9 9 9 9

Small and large series can be processed in batch sizes of 500 m up to 50.000 m/a per dimension in layer strengths from 20 to 40 µm.

Packaging in wooden crates or leased steel containers. The chrome bars are protected with plastic rings and oiled paper at a distance of 500 mm.