Schulz Hartchrom GmbH Hamburg - Hartverchromen von Kolbenstangen und Rohren

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Service & Contact: Phone: +49 40 822 9560 0
Hartverchromen von Kolbenstangen und Rohren Schulz Hartchrom GmbH
70 years metal processing in Hamburg

Product range chrome bars and chrome tubes

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.

  Chome 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
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