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  • Name: Precision cold drawn or cold rolled seamless steel pipe
  • No.: 04

Out Diameter:4-140mm

Thickness:0.5-12mm

Length:6-9m or as buyer's request

Standard:DIN2391,DIN17175,DIN10305,ASTM A179ASTM A192,EN10305

Grade:10#,20#,35#,45#,20Cr,40Cr,16Mn,ST35,ST37,ST37.4,ST45,ST52...

Technical:Cold rolled or Cold drawn

O.D. Tolerance: +/-0.5%  THK:+/-10%

 

OD Tolerance :

 

Chemical Composition of Material:

Steel grade

Chemical composition,%

C

Si

Mn

P

S

Cr

St45

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

ST52(E355)

≤0.22

≤0.55

≤1.6

0.025

0.025

0.25

SAE1026

0.22-0.28

0.15-0.35

0.60-0.90

0.040

0.050

/

27SiMn

0.24-0.32

1.10-1.40

1.10-1.40

0.035

0.035

0.300

20#

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.250

 

Steel Grade C Si Mn P(≦) S(≦) Cr()
ST45 0.17-0.24 0.17-0.37 0.35-0.65 0.035 0.035 0.250
ST52(E355) ≦0.22 ≦0.55 ≦1.6 0.025 0.025 0.250
SAE1026 0.22-0.28 0.15-0.35 0.60-0.90 0.040 0.050 /
27SiMn 0.24-0.32 1.10-1.40 1.10-1.40 0.035 0.035 0.300
20# 0.17-0.24 0.17-0.37 0.35-0.65 0.035 0.035 0.250

 

Mechanical Properties(Mpa):

Steel grade BKW BK BKS GBK NBK
Tensile Strength ReH N/mm min

Elonga

tion% min

Tensile Strength ReH N/mm min

Elonga

tion% min

Tensile Strength ReH N/mm min Yield strength Rm N/mm min

Elonga

tion % min

Tensile Strength ReH N/mm min

Elonga

tion % min

Tensile Strength ReH N/mm min Yield strength Rm N/mm min

Elonga

tion % min

St35 480 6 420 10 420 315 14 315 25 340-470 235 25
St45 580 5 520 8 520 375 12 390 21 440-570 255 21
St52 640 4 580 7 580 420 10 490 22 490-630 355
Steel grade Minimum values for the delivery condition
Steel name Steel   number + C + LC + SR + A + N
Rm Mpa A% Rm  Mpa A% Rm   Mpa ReH   Mpa A% ReH Mpa A% Rm  Mpa ReH   Mpa A%
E235 1.0308 480 6 420 10 420 350 16 315 25 340-480 235 25
E355 1.0580 640 4 580 7 580 450 10 450 22 490-630
 

 

 

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