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Application: For manufacturing auto semi-shaft casing
Dimension Tolerances:

Steel pipe supply condition

Pipe sizes

Allowed tolerance

 


Classification

 

 

I

 

 


Pipes delivered as per OD and WT

OD D

¡À1%

WT
s

WT¡Ü7mm

7mm<S¡Ü15mm

WT>15mm

+15%
-9%
+12.5%
-10%
+12.5%
-7.5%

II

Pipes delivered as per OD, ID and WT

£¨D£©
£¨d£©
£¨¦¤S£©

¡À1.0%
¡À1.75%
¡Ü15%

III

OD=77mm,ID=57mm
WT=10mm

£¨D£©

£¨d£©

£¨¦¤S£©

+1.0mm
-0.3mm
+1.5mm
-0.5mm
¡Ü1.5mm

Mechanical Properties:

Item NO

Grade

Tensile Strength
¦Òb
Mpa

Yield Strength
¦Ò0.2
MPa

Elongation
¦Ä5
%

Hardness
HB

1

45

¡Ý590

¡Ý335

¡Ý14

-----

2

45Mn2

----

------

-------

217--269

3

40MnB

----

-------

-----

217--269

4

40Cr

-----

--------

-----

217--269

Chemical composition:

Designation

C

Si

Mn

Cr

Mo

B

Cu

Ni

P

S

Max

45

0.42~
0.50

0.17~
0.37

0.50~
0.80

¡Ü0.25

----

----

¡Ü0.25

¡Ü0.30

0.035

0.035

45Mn2

0.42~
0.49

0.17~
0.37

1.40~
1.80

¡Ü0.30

¡Ü0.15

----

¡Ü0.25

¡Ü0.30

0.035

0.035

40MnB

0.37~
0.44

0.17~
0.37

1.10~
1.40

¡Ü0.25

----

0.0005~
0.0035

¡Ü0.25

¡Ü0.30

0.035

0.035

40Cr

0.37~
0.44

0.17~
0.37

0.50~
0.80

0.80~
1.10

¡Ü0.15

 

¡Ü0.25

¡Ü0.30

0.035

0.035

Products can be also supplied according to the standard of DIN 1629-1984.

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