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CROMAX 280X – HARD CHROME BAR
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- For Ø≥20 mm, the chrome layer thickness is 20 µm min. For smaller sizes, the minimum thickness is 15 µm
- The surface roughness (Ra) is always less than 0.2 µm and normally in the range 0.05-0.15 µm. Rt (ISO) is always less than 2.0 µm and normally in the range 0.5-1.5 µm
- The chrome layer hardness is 850 HV0.1min
- For Ø<30 mm, the maximum deviation is 0.1 mm/0.5 m. The maximum deviation for larger diameters is 0.1 mm/1.0 m
- The out of roundness is maximized at 50% of the diameter tolerance interval
- ISO f7 is standard. Other tolerances can be supplied upon request (narrowest range is ISO level 7)
- Tensile strength (Rm): 650 – 800 MPa
- Yield strength(Re): 520 MPa
- Elongation (As): 12%
- Hardness (HBW): 200 – 240
- Resilience (-20°C): No guarantee
- Tensile strength (Rm): 650 – 800 MPa
- Yield strength(Re): 520 MPa
- Elongation (As): 19%
- Hardness (HBW): 200 – 240
- Resilience (-20°C): 27 J
- Tensile strength (Rm): 550- 700 MPa
- Yield strength(Re): 440 MPa
- Elongation (As): 19%
- Hardness (HBW): 180 – 230
- Resilience (-20°C): No guarantee
- CROMAX 280X
- EN 20MnV6
- DIN 20MnV6
- BS 55M
- AFNOR E420
- ASTM A572
INFORMATION:
Cromax 280X is based on a low carbon, microalloyed steel combining high strength with excellent machinability and weldability. For Ø ≤ 90 mm, yield and tensile strength are 20% higher than is normal for hard-chrome bars based on low-carbon weldable steel. This improvement is achieved without detriment to machinability or weldability.
In comparison with standard products based on grade 20MnV6, the superior properties profile of Cromax 280X offers a number of potential advantages in the design and manufacture of fluid-power cylinders, not the least of which is the possibility to downsize piston rods without loss of load-bearing capacity, thereby reducing not only weight but also cost.
SPECIFICATIONS:
TYPICAL MECHANICAL PROPERTIES:
(Ø) <20 mm
(Ø) 20-90 mm
(Ø) >90 mm
CORRESPONDING STANDARDS:
Below is the closest equivalent standard for the steel in Cromax 280X.
Ovako Cromax is the major manufacturer in Europe of hard-chrome plated products in the form of bar and tube.
STANDARD SIZES (available in stock)
Diameter (mm) | Weight (kg/m) | Diameter (inch) | (mm) | Weight (kg/m) |
---|---|---|---|---|
12 | 0.89 | 1 | 25.40 | 3.97 |
14 | 1.21 | 1 1/4 | 31.75 | 6.22 |
16 | 1.58 | 2 | 50.80 | 15.91 |
18 | 2.00 | 2 1/2 | 63.50 | 24.87 |
20 | 2.47 | |||
25 | 3.85 | |||
30 | 5.55 | |||
32 | 6.31 | |||
35 | 7.55 | |||
40 | 9.86 | |||
45 | 12.48 | |||
50 | 15.41 | |||
55 | 18.65 | |||
60 | 22.19 | |||
70 | 30.21 | |||
80 | 39.46 | |||
85 | 44.45 | |||
90 | 49.94 | |||
100 | 61.65 |