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Chrome Tube/Hollow Chrome Bar

Chrome Tube/Hollow Chrome Bar

● Outer Diameter：20 mm - 300 mm
● Material：DIN CK45, SAE1045, JIS S45C, JIS STKM13C, SAE1026, ST52,                         20MnV6, 42CrMo4, 40Cr, AISI 304, AISI316, AISI 431
● Tolerance：ISO f7, f8
● Chrome layer thickness：25(+/-5)μm
● Roughness：≤0.2μm
● Hardness：850-1150HV
● Straightness：≤0.2/1000mm
● Roundness：Half of the diameter tolerance

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● Outer Diameter：20 mm - 300 mm
● Material：DIN CK45, SAE1045, JIS S45C, JIS STKM13C, SAE1026, ST52,                         20MnV6, 42CrMo4, 40Cr, AISI 304, AISI316, AISI 431
● Tolerance：ISO f7, f8
● Chrome layer thickness：25(+/-5)μm
● Roughness：≤0.2μm
● Hardness：850-1150HV
● Straightness：≤0.2/1000mm
● Roundness：Half of the diameter tolerance

Chemical Composition

Material

C%

Mn%

Si%

S%

P%

V%

Cr%

CK45

0.42-0.50

0.50-0.80

0.4

0.035

0.035



ST52

0.22

1.6

0.55

0.035

0.04



20MnV6

0.16-0.22

1.30-1.70

0.10-0.50

0.035

0.035

0.10-0.20


42CrMo4

0.38-0.45

0.60-0.90

0.15-0.40

0.03

0.03


0.90-1.20

40Cr

0.37-0.45

0.50-0.80

0.17-0.37




0.80-1.0