Schulz Hartchrom GmbH

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	Piston rods	Piston pipes	temper hardened piston rods	nickel-plated piston rods and pipes	hardened piston rods
Diameters	20-100mm	20-100mm	20-100mm	20-150mm	20-100mm
min. length	5,000 mm	5,000 mm	5,000 mm	200 mm	5,000 mm
max. length	6,800 mm	6,800 mm	6,800 mm	3,000 mm	6,800 mm
Material	C45 R, 20MnV6 and similar	St 52 and similar	42CrMo4 and similar	C45 R, 20MnV6, St 52 and similar	C45 R and similar
Layer thickness	Cr 25 µm +5	Cr 25 µm +5	Cr 25 µm +5	Ni 25 µm + Cr 25 µm +5	Cr 25 µm +5
Tolerance	ISO 7-8	ISO 7-8	ISO 7	ISO 7-8	ISO 7-8
Surface roughness	Rmax ≤ 2	Rmax ≤ 2	Rmax ≤ 2	Rmax ≤ 2	Rmax ≤ 2
Roundness	½ tolerance	½ tolerance	½ tolerance	½ tolerance	½ tolerance
Percentage contact area	Mr ≥ 50 %	Mr ≥ 50 %	Mr ≥ 50 %	Mr ≥ 50 %	Mr ≥ 50 %
Microcracks/cm	300 - 600	300 - 600	300 - 600	300 - 600	300 - 600
Hardness (HV, HRC)	≥ 900, ≥ 65	≥ 900, ≥ 65	≥ 900, ≥ 65	≥ 900, ≥ 65	≥ 900, ≥ 65
Straightness (mm/m)	≤ 0.1/1000	≤ 0.1/1000	≤ 0.1/1000	≤ 0.1/1000	≤ 0.1/1000
Corrosion resistance (ISO 9227)	72 h	72 h	72 h	1000 h	72 h
Rating number (ISO 10289)	8	8	8	8	8

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 pistons are protected with plastic rings and oiled paper at a distance of 500 mm.