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You are here: Home » Products » Seamless Steel Tube » Cold Rolled Seamless Steel Tube » Chinese Manufactuer High Precision 12mm Seamless Steel Pipe
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Chinese Manufactuer High Precision 12mm Seamless Steel Pipe

Alloy seamless steel tube with high performance,because high content of Cr material is included .

  • RAY STEEL TUBE
  • 10#(ST35.8),20# (St45.8),45#(1045)1020 (20#, STPG42,STKM12B,STKM12C,STKM13A,STKM13B,A106Gr.B, A53.B, St45.8,St44, St45, E235 etc)
  • OD:10-65 mm , Thickness: 1-8 mm
  • Cold rolled
Quantity:

DIN high precision cold-rolled seamless steel tube

 Synopsis of Craft: quality carbon steel-cold rolled-heat treatment without oxidization (NBK Status)-nondestrutive testing.

In the wall honing and inside flushing under the high pressure.Antirust oiling outside surface-plastic capping on both ends.

Main Features:High precision, excellent brightness, no oxidization on the outer and inner walls after heat treatments, high cleanness of inside wall. The steel tube is able to withstand high pressure. No deformation after cold bending,no crack after flaring and flattening. The complicated geometrical forming and machining can be realized.

Color of tube: Gray with white.

Main Application: To be used in hydraulic system,automobile and in the occasion where the high precision, brightness,cleanness and mechanical properties of the tube are required.

Production StanardsExechtjve StandardProducing RangeSteel Grade
Seamless Steel Tube for Liquid TransportingGB/T 8163-1999Φ10-65 * 1-610#,20#,35#,45#,16Mn
Seamless steel tubne for Elevated TemperatiureEN10305-1/4Φ10-65 * 1-6E215,E235,E355
Cold Drawn and Cold Rolled Seamless Precision TubeDIN2391Φ10-65 * 1-6ST35,ST37.4,ST45,ST52.4

Chemical composition comparison Sheet:


Steel Grade C Si Mn S PCr    NiCu
100.08-0.130.15-0.350.30-0.60≤0.030≤0.030≤0.20≤0.25≤0.25
10100.08-0.130.15-0.350.30-0.60≤0.050≤0.040≤0.20≤0.25≤0.25
STKM11A≤0.12≤0.35≤0.60≤0.040≤0.040


S10C0.08-0.130.15-0.350.30-0.60≤0.030≤0.030≤0.20≤0.20≤0.30
DC011.0330≤0.12
≤0.60≤0.045≤0.045


C10C1.02140.08-0.12≤0.100.30-0.50≤0.025≤0.025AL0.020~0.060
Гост10 0.07-0.140.17-0.370.35-0.65≤0.035≤0.040≤0.15

A106 Gr.A≤0.25≤0.100.27-0.93≤0.035≤0.035≤0.40≤0.40≤0.40
St37≤0.170.17-0.370.35-0.65≤0.020≤0.025≤0.25≤0.25≤0.20
St35≤0.17≤0.35≤0.40≤0.025≤0.025


E215≤0.10≤0.050.7≤0.025≤0.025


200.17-0.230.17-0.370.35-0.65≤0.035≤0.035≤0.25≤0.30
STKM12A≤0.20≤0.35≤0.60≤0.20≤0.040≤0.040

STKM12B
STKM12C
STKM13A≤0.25≤0.350.30-0.90≤0.20≤0.040≤0.040

STKM13B

STKM13C

10200.18-0.23
0.30-0.60≤0.050≤0.040


S20C0.18-0.230.15-0.350.30-0.60≤0.030≤0.030≤0.20≤0.20≤0.20
C22    1.04020.17-0.24≤0.400.40-0.70≤0.045≤0.045≤0.40≤0.40
C20C 1.0411 0.18-0.22≤0.100.7-0.9≤0.025≤0.025


Гост           200.17-0.240.17-0.370.35-0.65≤0.035≤0.040≤0.025≤0.030≤0.030
A106Gr.B≤0.25≤0.100.29-1.06≤0.035≤0.035≤0.40≤0.40≤0.40
A53.B≤0.30
≤1.2≤0.045≤0.05≤0.40≤0.40
St45≤0.21≤0.35≥0.40≤0.025≤0.025


E2350.17-0.22≤0.35≤0.40≤0.025≤0.025


450.42-0.500.17-0.370.50-0.80≤0.035≤0.035≤0.25≤0.25≤0.25
10450.43-0.500.17-0.370.50-0.80≤0.045≤0.045≤0.40≤0.40≤0.10
        C45             1.05030.42-0.50≤0.400.50-0.80≤0.045≤0.045≤0.40≤0.40≤0.10
Гос т   450.42-0.500.17-0.370.50-0.80≤0.035≤0.040≤0.25≤0.30≤0.30
CK450.42-0.500.17-0.370.50-0.80≤0.020≤0.025≤0.25≤0.25≤0.20

Mechanical properties of the table:


Steel GradeTensile StrengthYield strengthElongationHardness BK)
MpaMpa%HB 
1010≥335≥205≥31≤137
STKM 11A≥295/≥35
S10C≥335≥205≥31≤137
A106 Gr.A≥330≥205≥35
St35.8≥360≥235≥25
St37≥335≥205≥31
St35≥420≥315≥8
E215≥430
≥8
A53.B≥415≥240≥20
 20#≥410≥245≥25≤156
E235≥480≥235≥25
1020≥410≥245≥25≤156
A106 Gr.B≥415≥240≥25
St45≥580
≥5
E235≥480
≥8
S20C≥410≥245≥25≤156
STKM12A≥345≥175≥35
STKM12B≥390≥275≥25
STKM12C≥470≥355≥20
STKM13A≥375≥215≥30
STKM13B≥440≥305≥20
STKM13C≥510≥380≥15
45#≥600≥355≥16≤229
CK45≥590≥345≥21≤230
C45       1.0503≥600≥355≥16≤229
30CrMo≥930≥785≥12≤229
4130≥930≥786≥12≤229
SCM430≥930≥785≥12≤229
40Cr≥980≥785≥9≤207
SCr440≥980≥785≥12≤207
5140≥980≥785≥9≤207
40CrMo≥1080≥930≥12≤217
35Cr≥930≥735≥11≤207
5135≥536≥555≥31≤414 (HBW)
SCr435≥930≥735≥11≤207
34Cr4≥930≥735≥11≤207
1.7033≥836≥538≥24≤233 (HBW)

Dimension tolerance comparision Chart
 Outside Diameter     GB/T 3639           DIN2391(EN10305)     RAY  steel tube            standard   Special standard   
       6-30mm       +/-0.1 mm           +/-0.08 mm      +/-0.05 mm       +/-0.03 mm
      31-40mm       +/-0.15 mm           +/-0.15 mm      +/-0.05 mm       +/-0.03 mm
      41-50mm       +/-0.20 mm           +/-0.20 mm      +/-0.05 mm       +/-0.03 mm
      51-60mm       +/-0.25 mm           +/-0.25 mm      +/-0.08 mm       +/-0.03 mm
      61-65mm       +/-0.30 mm           +/-0.30 mm      +/-0.10 mm       +/-0.05 mm
     Thickness       +/-0.12 mm           +/-0.10 mm      +/-0.05 mm       +/-0.03 mm



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