Limestone Quarry Plant

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EN 10305-1 / DIN 2391 cold drawn seamless steel pipe


EN 10305-1 / DIN 2391 cold drawn seamless steel pipe
 
Application: for Atuo;for machinery use; Oil cylinder tube; Motorcycle shock reducer steel tubes; Auto shock reducer inner cylinder.
Size(mm): O.D.:10-324mm ; W.T.:1-30mm; L:max 14000

Precision Phosphated Steel Tube

EN 10305-1 / DIN 2391 cold drawn seamless steel pipe

Precision seamless phosphated carbon steel tube:
▪   Standard: 
   DIN 2391, EN 10305-1, EN 10305-4
▪   Materials: 
  ST35, ST37.4, ST37, ST45, ST52, ST52.4, E235, E255, E355. 
▪   Delivery condition: 
   Black Phosphated after bright annealed. 

Grade and Chemical Composition(%):
Brand Chemical Composition(%)
C max Si max Mn P max S max
St 35 0.17 0.35 ≥0.40 0.025 0.025
St 45 0.21 0.35 ≥0.40 0.025 0.025
St 52 0.22 0.55 ≤1.60 0.025 0.025
Steel grade Chemical Composition(%)
Steel name 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 -
 
 

▪   Size Range: 
   Outer Diameter: 4 mm - 60 mm    Wall thickness: 0.5 mm - 10 mm 
▪   Main Features: 
   Bright black color is homogeneously distributed on the tube surface. with good anti-rust and corrosion resistance performance. 
▪   Main Application: 
  Used in hydraulic systems, mechines and facilities, other applications which require good rust proof and corrosion resistance performance.

 
Mechanical Properties(Mpa):
Steel grade BKW BK BKS GBK NBK
Tensile Strength ReH N/mm min Elongation% min Tensile Strength ReH N/mm min Elongation% min Tensile Strength ReH N/mm min Yield strength Rm N/mm min Elongation % mi Tensile Strength ReH N/mm min Elongation % min Tensile Strength ReH N/mm min Yield strength Rm N/mm min Elongation % 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 22
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

 

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