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DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES

  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • S45c C45 AISI1045 DIN Ck45 DIN C45 SAE 1045 Cold Drawn Steel Precision Tube
  • 10305-3 Precision Steel Tube
  • EN10305-1 Cold drawn precision seamless steel tube
  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • Advanced High Strength Steel Tube (AHSS)
  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • DIN 2391 St37.4(E235),St52.4(E355N),EN10305-1,BS 3062 PRECISION STEEL TUBES
  • EN 10305 Cylinder Tubes
Model No.︰-
Brand Name︰DIN 2391,EN10305-4,AS1450 PRECISION SEAMLESS TUBE
Country of Origin︰-
Unit Price︰US $ 1300 / MT
Minimum Order︰20 MT
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Product Description
DIN 2391
Standard Range Technical Properties
In Diameters 30mm to 800mm Wall Thickness 3mm - 50mm Length 3m to 12m Tolerance ISO H 8 Straightness 1/1000mm Surface Roughness Ra 0.20 - 0.40 Micron Packing Oiled and capped
Grade Mfg. Process Chemical composition Material No JIS 
C Si Mn P S Ni Cr Mo Others a
St30Si S 0.10Max 0.30Max ÷0.55 0.040Max 0.040Max - - - - a 1.0211 (STKM11)
St30A1 S 0.10Max 0.05Max ÷0.55 0.040Max 0.040Max - - - Al deoxydized a 1.0212 (STKM11)
St35 S 0.17Max 0.35Max ∶0.40 0.050Max 0.050Max - - - - a 1.0308 (STC38)
St45 S 0.21Max 0.35Max ∶0.40 0.050Max 0.050Max - - - - a 1.0408 (STKM13)
St52 S 0.22Max 0.55Max ∶1.60 0.050Max 0.050Max - - - - a 1.058 (STKM19)
Mechanical Properties:
Designation Cold drawn / hard Cold drawn / soft Cold drawn and stress relieved Annealed Normal
Symbol +c(BK) +LC(BKW) +SR(BKS) +A(GBK) +N(NBK)
Delivery Condition Description No heat treatment after the final cold drawing process After the final heat treatment there is a suitable drawing pass. After the final cold drawing process there is a stress relief heat t treatment in a controlled atmosphere After the final cold drawing process the tubes are annealed in a controlled atmosphere After the final cold drawing process the tubes are normalized in a controlled atmosphere
    Delivery State BK BKW BKS GBK NBK
Grade Material NO. Tensile Strength Elongation Tensile Strength Elongation Tensile Strength Yield Strength Elongation Tensile Strength Elongation Tensile Strength Yield Strength  Elongation
(N/mm2) % (N/mm2) % (N/mm2)  (N/mm2) % (N/mm2) % (N/mm2)  (N/mm2) %
Min. Min. Min. Min. Min. min. Min. Min. Min. Min. min. Min.
St 30 Si 1.0211 430 8 380 12 380 280 15 280 30 290-420 215 30
St 30 Al 1.0212 430 8 380 12 380 280 15 280 30 290-420 215 30
St 35 1.0305 480 6 420 10 420 315 14 315 25 340-470 235 25
St 45 1.0408 580 5 520 8 520 375 12 390 21 440-570 255 21
St 52 1.058 640 4 580 7 580 420 10 490 22 490-630 355

22

  EN 10305-1
Gr. Steel number C max Si max Mn P max S max Al min

E215

1.0212

0.10

0.05

0.70

0.025

0.025

0.025

E235

1.0308

0.17

0.35

1.20

0.025

0.025

-

E355

1.0580

0.22

0.55

1.60

0.025

0.025

-

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%

E215

1.0212

430

8

380

12

380

280

16

280

30

290-430

215

30

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

355

22

DELIVERY CONDITION

Designation Symbol Delivery Condition Description
Cold drawn / hard +c(BK) No heat treatment after the final cold drawing process
Cold drawn / soft +LC(BKW) After the final heat treatment there is a suitable drawing pass.
Cold drawn and stress relieved +SR(BKS) After the final cold drawing process there is a stress relief heat t treatment in a controlled atmosphere
Annealed +A(GBK) After the final cold drawing process the tubes are annealed in a controlled atmosphere
Normal +N(NBK) After the final cold drawing process the tubes are normalized in a controlled atmosphere

Seamless cold-drawn precision steel pipes E235N (St 37.4) and E355N (St. 52.4) according to the EU’s EN 10305-4 standard
a) E235N (St 37.4) – NBK – Normalized, phosphated and oiled inside and outside

b) E235N (St 37.4) – NBK/ZN – Normalized, electric zinc plated with Cr-VI-free passivation

c) E355N (St 52.4) – NBK – Normalized, phosphated and oiled inside and outside

d) E355N (St 52.4) – NBK/ZN – Normalized, electric zinc plated with Cr-VI-free passivation

DIN 2391  Seamless precision steel pipes for Hydraulic system
ASTM A513 Seamless precision steel pipe
ASTM A519  Seamless precision steel pipe
EN10305-1 Seamless precision steel pipe for machinery use
EN10305-2 Welded precision steel pipe for oil cylinder tube
EN 10305-4 hydraulic bending precision seamless steel tubes

Product Image


S45c C45 AISI1045 DIN Ck45 DIN C45 SAE 1045 Cold Drawn Steel Precision Tube
S45c C45 AISI1045 DIN Ck45 DIN C45 SAE 1045 Cold Drawn Steel Precision Tube

10305-3 Precision Steel Tube
10305-3 Precision Steel Tube

EN10305-1 Cold drawn precision seamless steel tube
EN10305-1 Cold drawn precision seamless steel tube





Advanced High Strength Steel Tube (AHSS)
Advanced High Strength Steel Tube (AHSS)



EN 10305 Cylinder Tubes
EN 10305 Cylinder Tubes

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