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Section Shape:triangular/hexagonal/triangular
Application:Mechanical tubing,Automotive steel tubes
Materials:STKM11A,STKM12ABC,STKM13ABC,SCM430,St52.3,SAE1020,SAE4130
Standard:JIS G3445
Hexagon Seamless Carbon and Alloy Steel Mechanical Tubing by cold drawing or cold rolling process
Size range: O.D.:6-168mm W.T.:1-15mm L:max12000mm
DOM Steel Tube Delivery Condition:
HR CW SR A N HF
HR:hot rolled
CW:cold worked
SR:stress relieved
A:annealed
N:normalized
HF: hot formed.
Drawn Over Mandrel Steel Tube Mechanical properties:
Tensile strength min470Mpa
Yield Strength min275 Mpa
Elongation min 22%
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Tolerances on OD |
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Division |
Tolerance on OD |
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No.1 |
under 50mm ±0.5mm
50mm or over ±1%
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No.2 |
under 50mm ±0.25mm
50mm or over ±0.5%
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No.3 |
under 25mm ±0.12mm
25mm or over to and excel.40mm ±0.15mm
40mm or over to and excel.50mm ±0.18mm
50mm or over to and excel.60mm ±0.20mm
60mm or over to and excel.70mm ±0.23mm
70mm or over to and excel.80mm ±0.25mm
80mm or over to and excel.90mm ±0.30mm
90mm or over to and excel.100mm ±0.40mm
100mm or over ±0.50%
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Note:1. For hot finished seamless steel tube, the outside diameter tolerance No.1 shall be applied.
2.The tolerance on outside diameter of quenched and tempered tubes shall be as agreed upon by the purchaser and manufacturer.
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Tolerances on WT |
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Division |
Tolerance on WT |
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No.1 |
under 4mm +0.6mm -0.5mm
4mm or over +15%-12.5%
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No.2 |
under 3mm ±0.3mm
3mm or over ±10%
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No.3 |
under 2mm ±0.15mm
2mm or over ±8%
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Main Product:
Seamless Bearing Tubes,
Mining Drill Pipes,
Boiler Steel Tubes ,
Alloy Mechanical Tubing,
Precision Steel tubes,
Stainless Steel tubes
