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chrome plated rod mechanical properties chrome bar tolerance

22-11-2022

Following are Chrome plated rod and bar technical parameters:


CHEMICAL COMPOSITION

Material

C%

Mn%

Si%

S%

P%

V%

Cr%

CK45

0.42-0.50

0.50-0.80

≤0.04

≤0.035

0.035


≤ 0.25

ST52

≤0.22

≤1.6

≤0.55

≤0.04

≤0.04



20MnV6

0.16-0.22

1.30-1.70

0.10-0.50

≤0.035

≤0.035

0.10-0.20

≤0.30 

42CrMo4

0.38-0.45

0.60-0.90

0.15-0.40

≤0.035

≤0.035

 0.07-0.12

0.90-1.20

40Cr

0.37-0.45

0.50-0.80

0.17-0.37

≤0.035

≤0.035


0.80-1.10

304

≤0.07

≤2

≤1

≤0.03

≤0.045


18-20

420

0.16-0.25

≤1.5

≤1

≤0.03

≤0.04


12-14

431

0.12-0.22

≤1.5

≤1

≤0.03

≤0.04


15-17

430

≤0.12

≤1

≤0.75

≤0.03

≤0.04


16-18

 

 

MECHANCIAL PROPERTIES

Material

T.S  (MPA)

 

Y.S  (MPA)

 

Elongation %

 

CONDITION

CK45

≥610

≥355

≥15

NORMALIZE

CK45

≥800

≥630

≥20

Q + T

ST52

≥500

≥355

≥22

NORMALIZE

20MnV6

≥750

≥590

≥12

NORMALIZE

42CrMo4

≥980

≥850

≥14

Q + T

40Cr

≥1000

≥800

≥10

Q + T

304

≥520

≥205

≥40


420

≥635

≥440

≥20


431

≥800

≥600

≥10


430

≥450

≥205

≥22


 

 

Tolerance:

 

Diameter (mm)

ISO f7  (um)

ISO f8  (um)

g6 (um)

6 <Φ≤10

-13 to -28

-13 to -35

-5 to -14

10 <Φ≤18

-16 to -34

-16 to -43

-6 to -17

18 <Φ≤30

-20 to -41

-20 to -53

-7 to -20

30 <Φ≤50

-25 to -50

-25 to -64

-9 to -25

50 <Φ≤80

-30 to -60

-30 to -76

-10 to -29

80 <Φ≤120

-36 to -71

-36 to -90

- 12 to -34

120 <Φ≤180

-43 to -83

-43 to -106

-14 to -39

180 <Φ≤250

-50 to -96

-50 to -122

-15 to -44

 


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