Cromax 280X Ovako06Eng - Ovako - Ovako

1 Cromax 280 XHard chrome barCromax 280X_Ovako06 Eng 06-04-25 Sida 2 Standard sizesDia.,Dia.,Dia.,mmkg/mmmkg/ standardsThe table shows the closest equivalent standard for the steel in Cromax rangesSize, ISO f7, mmmupperlower10 - 18- 16- 34> 18 - 30- 20- 41> 30 - 50- 25- 50> 50 - 80- 30- 60> 80 - 120- 36- 71> 120 - 150- 43- 83 Cromax 280 Xis based on a low carbon, microalloyed steel combining high strength with excellent machinability and 90 mm, yield and tensile strength are 20% higher than is normal for hard-chrome bars based on low-carbon weldable improvement is achieved without detriment to machinability or comparison with standard products based on grade 20 MnV6, the superior properties profile of Cromax 280x offers a number ofpotential advantages in the design and manufacture of fluid-powercylinders, not the least of which is the possibility to downsize pistonrods without loss of load-bearing capacity, thereby reducing not onlyweight but also layerFor 20 mm, the chrome layer thickness is 20 m min.

2 For smaller sizes, the minimum thickness is 15 roughnessThe surface roughness (Ra) is always less than m and normally in the range m. Rt (ISO) is always less than m and normally in the range hardnessThe chrome layer hardness is 850 StraightnessFor < 30 mm, the maximum deviation is m. The maximum deviation for larger diameters is out of roundness is maximised at 50% of the diameter tolerance toleranceISO f7 is standard. Other tolerances can be supplied upon request(narrowest range is ISO level 7).Delivery lengthsProduction lengths are between m. Standard is + mwith the following exceptions.

3 For 20 mm, the production lengthis + m. For diameters 20 and 22 mm, the standard production lengths are + m and + m respectively. Bars with length + m can only be supplied for diametersbetween 40-80 unchromed length of each bar, the distance at eachend over which the chrome-layer properties and tolerances can notbe guaranteed, is at most m per end, m in total per , cut lengths can be supplied if required, but at a price chemical analysis Cromax 280x C %Si %Mn %S %V % %(*) max* = % C + % Mn/6 + (% Cu + % Ni)/15 + (% Cr + % Mo + % V)/5 Mechanical propertiesSize ( ),Yield stress,Ultimate tensileElongation,Hardness,Toughness,mmR eH, N/mm2, , Rm, N/mm2A5, %, , Joule, min.

4 < 20520650 - 80012200 - 240No guarantee20 - 90520650 - 80019200 - 24027 at -20 C> 90440550 - 70019180 - 230No guarantee (*)*Base steel meeting KV 27J at -20 C can be supplied by special sizes can be supplied upon request but not outside the above 280X_Ovako06 Eng 06-04-25 Sida 3 ISO 9227 ASTMDIN 50021 Salt spray type NSSB 117 SSNeutralAASSB 287 ESSA cetic acidCASSB 368 CASSC opper-acceleratedacetic acidWhile the correlation between these methods is not always clear, our experience isthat a given degree of corrosion is reached 2-3 times as fast in the AASS test as in in standard execution is guaranteed to attain rating 9 orbetter after 40 h in AASS test.

5 The same rating will be achieved in NSS test after about 100 280x has excellent weldability. However, for >90 mm, preheating to 150-200 C is recommended. Suitable consumables areOK for MMA welding and OK for MAG welding(shielding gas 80% Ar, 20% CO2). Cromax 280x can normally be friction welded without 280x can be supplied with three different packagingoptions: Paper tubes with the characteristic blue and yellow spiral stripes. Blue plastic sleeve, which can be left on as protection during piston-rod manufacture. Plastic spacer the two latter alternatives, the bars are normally packed in a wooden box for additional protection during of mode of packaging, every Cromax bar is marked with product and batch information so as to facilitate full Cromax productsOvako s hard-chrome product programme also comprises: Cromax C35E based on medium-carbon steel, induction-hardened bar, Cromax IH 482, quenched and tempered bar, Cromax 42 CrMo4, and Cromax in the form of tube ( Cromax Tube).

6 110040 Cromax 280x /TubeCromax IH 482 Cromax C35 ECromax 42 CrMo420030040050010 Cutting speed, m/minTool life, minSpecific machining recommendations for turning and threadingof Cromax 280x are tabulated turningFine turningThreadingparametersFeed, Cut depth, mm2 Tool (coated)ISO P15 P30 ISO P10 P15 ISO P20 P30 Speed, m/min280 350350 400200 230 Corrosion resistanceThe chromium layer generated in hard-chrome plating containsmicro-cracks and its corrosion resistance is thereby s Cromax products are characterised by a controlledmicro-crack distribution with high crack density, which in combination with specially adapted finishing procedures, provides for superior corrosion corrosion resistance specifications for hard-chrome products are based on salt-spray testing following the ISO 9227standard or its equivalents (see below)

7 , combined with evaluation according to ISO machinability of Cromax products in turning is compared in the diagram below. Coated carbide tool Sandvik SNMG 120408-PM-4015. Feed mm/r. Cutting depth 2 mm. Wear criterion mm. Cutting fluid: Peralube 0125 5%. Cromax C, Ni- Cromax When the application demands a higher corrosion resistance than afforded by standard Cromax , then Cromax C or Ni- Cromax execution is recommended. Cromax C is guaranteed for min. rating 9 after 100h in ISO 9227, AASS. Ni- Cromax is guaranteed not to corrode at all (rating 10) after 350h in AASS or 1 000h in order to distinguish from standard execution, Cromax C is supplied in a red plastic sleeve.

8 Ni- Cromax is characterised by white plastic or a white paper execution is described in more detail in a separate data reserve the right to make changes to dimensions, tolerances and other data given in this statements and implications regarding the properties or fitness for purpose of the productsdescribed in this sheet are for information only. Guarantees in relation to specific properties or fitness for purposeare valid only if agreed upon in 280X_Ovako06 Eng 06-04-25 Sida 4 Ovako Cromax ABBox 5013SE-194 05 UPPLANDS V SBYS wedenTel. +46 8 622 13 00 Fax. +46 8 622 13 28 Ovako Twente 867NL-7600 AW ALMELOThe NetherlandsTel.

9 +31 546 588 666 Fax. +31 546 588 602 Ovako Hallstahammar ABBox 505SE-734 27 HALLSTAHAMMARS wedenTel. +46 220 23 000 Fax. +46 220 10 207 Ovako Redon SASA venue des Nouies, REDON CEDEXF ranceTel. +33 299 714 168 Fax. +33 299 721 520 Ovako Mora ABBox 421SE-792 27 MORAS wedenTel. +46 250 28 400 Fax. +46 250 28 420 Ovako Molinella , 11I- 40062 MOLINELLA (BO)ItalyTel. +39 051 690 03 32 Fax. +39 051 880 a leading European producer of special steel longproducts for the automotive and engineering in 2005 exceeded million tons and comprisedlow-alloy and carbon steels in the form of bars, wire rod, tubes,rings and pre-components.

10 The company has 16 manufacturingsites and several sales companies in Europe and the USA. Ovako has 4,600 Cromaxis the major manufacturer in Europe of hard-chrome plated products in the form of bar and tube. The Cromax Group comprises five modern production units,two in Sweden and one in each of Holland, France and majority of the base-material requirements for Cromaxmanufacture are supplied by Ovako s own steel production units. The high and reproducible quality and superior mechanical characteristics of Cromax products are to a large extent attributable to a complete control over the entire manufacturing chain from steel melting to finished Cromax has about 200 employees and a turnover of EUR 60 2006 Cromax 280X_Ovako06 Eng 06-04-25 Sida 1