Cold Drawing Precision Steel Seamless Tubes For Automotive Industry

NAME

SCOPE(mm)

GB (mm)

DIN (mm)

Enterprise control(mm)

Special high-precision(mm)

OD

Out Diameter

4-30

±0.1

±0.08

±0.05

±0.03

31-40

±0.15

±0.15

±0.05

±0.03

41-50

±0.20

±0.20

±0.08

±0.03

51-60

±0.25

±0.25

±0.08

±0.03

Wall thickness?

0.5-7

±10%,Min±0.12

±10%

±10%,Min±0.05

±10%,Min±0.03

Standard

Material

EN10305-1

E215, E235, E255, E355,C45E, 30GrMo

DIN2391

ST35,ST45,ST52,ST37.4

BS6323/4

CFS3,CFS4,CFS5,CFS8

ASTMA519

SAE1010,SAE1020,SAE1045

JISG3445

STKM11A,STKM13A

SAEJ524

SAE1010

Delivery Condition

Heat treatment process

+C

Cold drawn/hard.After the last cold forming,no heat treatment.

+LC

Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass.

+SR

Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.

+A

After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.

+N

Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.