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Nichel + Chromium
1500 hours - 20MnV6
 
 
 
 

Ready-to-use bars which eliminate the risk for corrosion of piston rods
NiKrom 500 is the optimum choise in critial applications or whenever corrosion threatens to drasticaly reduce the useful life of piston rods
 

Applications areas

    

Industry

 Strastecig sector Aggressive environments

• Mining
• Production of chemicals
• Oil and gas
• Transport
• Civil engineering
• Agricolture
 

 • Military
• Aerospace
• Nuclear
• Power generation
 		 • Marine and offshore
• Extreme climates
• Corrosive chemicals

Chemical analysis of 280X steel (20MnV6 improved)
C % Si % Mn % P % S % V % C.E. % (*)
0,18 0,35 1,55 ≤ 0,020 0,025 0,11 0,55 max

* C.E.=%C+%Mn/6+(%Cu+%Ni)/15+(%Cr+%Mo+%V)/5

Mechanical properties
Dia. Ø mm Res.snerv. N/mm² Resist. Traz. Ult. N/mm² Allungam. % Durezza HB Tenacità KV, Joule
20-90 ≥ 520 650-800 ≥ 19 200-240 ≤ 27 a - 20°C
>90-125 ≥ 440 550-700 ≥ 19 180-230 ≤ 27 a - 20°C
>125 ≥ 350 550-700 ≥ 19 180-230 ≤ 27 a - 20°C

Other grades

Other steel grades can be offered with NiKrom surface treatment. Further, it is possible to combine the outstanding corrosion resistance of NiKrom with an induction-hardened or a tubular execution.

Surface layer and surface finish
Nickel layer Chrome layer Surface roughness
Thickness ≥ 30 µm Thickness ≥ 20 µm Ra ≤ 0,2 µm
hardness ca 300 HV hardness ≥ 850 HV Rt ≤ 1,6 µm

Dimensional tolerances
Diameter tolerance Straightness Ovality
ISO f7 0,1 mm/m 50% di f7

Bar lenghths

Standard bar lengths are 6 100 +100/-0 mm. Other lengths can be supplied but the maximum is 6 500 +100/-0 mm. For diameters ≥130 mm, the maximum length possible is 6 100 +100/-0 mm.

Certified corrosion resistance
  ISO 9227 NSS ASTM B117 Neutral salt spray ISO 9227 AASS ASTM B287 Acetic acid salt spray
Duration
Rating according to ISO 10289		 >1500 hours
10 (no corrosion)		 >500 hours
10 (no corrosion)

Standard metric programme (*)
 

Ø mm Kg/m
 
Ø mm Kg/m
20 2,47
 
63 24,47
22 2,98
 
65 26,05
25 3,85
 
70 30,21
28 4,83
 
75 34,68
30 5,55
 
80 39,46
32 6,31
 
85 44,54
35 7,55
 
90 49,94
36 7,99
 
100 61,65
40 9,86
 
110 74,60
42 10,88
 
120 88,78
45 12,48
 
125 96,33
50 15,41
 
130 104,19
55 18,65
 
140 120,83
56 19,33
 
150 138,72
60 22,19
 
160 157,82


*Imperial sizes are available. The standard range for such is 0.875-6 inch and imperial bars will normally be manufactured to order.
 

IGR spa Via Giuseppe Di Vittorio, 53 - 42020 Puianello di Quattro Castella - Reggio Emilia - Italy
Tel. +39 0522 885111 - Fax +39 0522 885787 - Partita IVA: 02298050358 E-Mail: igr@igr.it
Riporti di cromo duro, tubi e barre cromate in acciaio per oleodinamica e pneumatica. Hard chromium plating, steel tubes and bars for hydraulic and pneumatic.