Cold Rolled/Cold Drawn Steel Pipe

Steel Grade

Chemical composition,%

C

Si

Mn

P<

S<

Cu<

Ni<

Cr<

Mo<

V<

ASTM A106 GR.B(ST45)

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

0.400

0.250

0.15

0.08

CK45

0.42-0.50

0.17-0.37

0.50-0.80

0.035

0.035

0.250

0.250

0.250

/

/

Q345B

≤0.2

≤0.5

1.00-1.60

0.030

0.030

0.025

/

0.030

/

/

Q345D

≤0.2

≤0.55

1.00-1.60

0.030

0.030

0.025

/

0.025

/

/

E355(ST52)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.250

/

0.250

/

/

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

/

/

/

/

Delivery Condition

BK

BK+S

Rm Mpa

Elongation
A5(%)

Rm Mpa

ReH Mpa

Elongation
A5(%)

ASTM A106 GR.B(ST45)

≥550

≥8

≥520

≥375

≥15

CK45

≥640

≥5

≥600

≥520

≥10

Q345B

≥640

≥5

≥600

≥520

≥14

E355(ST52)

≥640

≥5

≥600

≥520

≥14

SAE1026

≥640

≥5

≥600

≥510

≥15

Low temperature impact test upon request(27J/-20°C)

Tolerance:

Processing form

O.D tolerance

Straightness

THK tolerance

I.D tolerance

I.D Roughness (RA)

Cold rolled

±0.1 ~±0.5

0.5-1/1000

±1% ~±12.5%

±0.1 ~±0.5

0.4-1,6pm

Cold drawn

±0.3 ~±0.5

±1% ~±10%

-0.3 ~-0.7

0.8-1,5pm