AISI 1010 / S10c Carbon Steel Tube – Mechanical Tubing – Seamless Steel Pipe
1020 / S20C Hydraulic Cylinder Tube , High Precision Skiving Pipe – Honed Steel Tubing
27SiMn seamless cold drawn steel tube, with black annealed out surface
4145H Modified Alloy Steel Round Bar, Hot Rolled Steel Bar
AISI 4130 75K P+X Alloy Steel Bar
Categories:Steel tubes
Model No.:JIS G3472
Surface condition:smooth
The tubes shall be manufactured from hot finished welded tubes by cold drawing. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled atmosphere.All non-destructive testing (NDT) activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel authorised to operate.
Higher Strength & Hardness Properties
Size Accuracy
Enhanced Appearance
Uniform Micro-structure
Easier To Machine
Superior Finish In Subsequent Manipulations
1.Hydraulic Cylinders
2.Auto and Truck Axles
3.Suspension parts and shock absorbers
4.High Speed Shafts and rollers
5.Bearings and Spacers
6.Roll cages
7.Agricultural components and many other machined tubular parts.
Specified outside diameter with tolerance: 4 (+/-0,08) to 300 (+/-0,35) mm
Specified inside diameter with tolerance: 2 (+/-0,15) to 100 (+/-0,35) mm
Lengths: standard length of 6 m ; exact length ; other length
Straightness: The deviation from straightness of any tube length L shall not exceed 0,0015 L. Deviations from straightness over any one metre length shall not exceed 3 mm.
JIS G3472 Electric Resistance Welded Carbon Steel Tubes for Automobile
Symbol of grade | C | Si | Mn | P | S |
STAM290GA | 0.12 max. | 0.35 max. | 0.60 max. | 0.035 max. | 0.035 max. |
STAM290GB | 0.12 max. | 0.35 max. | 0.60 max. | 0.035 max. | 0.035 max. |
STAM340G | 0.20 max. | 0.35 max. | 0.60 max. | 0.035 max. | 0.035 max. |
STAM390G | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.035 max. | 0.035 max. |
STAM440G | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.035 max. | 0.035 max. |
STAM440H | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.035 max. | 0.035 max. |
STAM470G | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.035 max. | 0.035 max. |
STAM470H | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.035 max. | 0.035 max. |
STAM500G | 0.30 max. | 0.35 max. | 0.30 to 1.00 | 0.035 max. | 0.035 max. |
STAM500H | 0.30 max. | 0.35 max. | 0.30 to 1.00 | 0.035 max. | 0.035 max. |
STAM540H | 0.30 max. | 0.35 max. | 0.30 to 1.00 | 0.035 max. | 0.035 max. |
The internal and external surface finish of the tubes shall be typical of the manufacturing process and the heat treatment, and it shall be such that any surface imperfections such as ridges, dents or shallow grooves requiring dressing can be identified. It shall be permissible to dress, by grinding or machining, surface imperfections provided that, after doing so, the dimensions are within the specified tolerances. All dressed areas shall blend smoothly into the contour of the tube. Surface imperfections which encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this part of EN 10305.The tubes shall have smooth outer and inner surfaces with a roughness Ra 4 um, unless a reduced roughness of Ra 2 um is specified for the inner surface is specified.
The tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs.
Chemical analysis
Tensile test
Flattening test
Drift expanding test
Dimensional inspection
Visual examination
NDT for verification of leak tightness
The tubes shall be delivered with a temporary protection against corrosion.
The tubes shall be phosphatized before temporary protection.
The tube ends shall be protected with plugs or caps.
1:reduced internal roughness of 2 um
2:lengths other than 6 m
3: alternative marking
4: protection by phosphatization
5:protection by galvanization and chromatization type blue-white
6:protection by galvanization and chromatization type yellow
7:protection by galvanization and chromatization type olive green
8:protection of tube ends
9:special packaging
1 Cutting: Small pieces
2 End: Plaint or Beveled or threaded
3 CNC Machine: Produce as your drawing
4 Package: Bare/Nylon/Canvas/Wooden
5 Payment:T/T, L/C, O/A(request credit)
6 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)
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