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 G3473
Surface condition:polished or honed
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.
Symbol of grade | Manufacturing method | Symbol of manufacturing method | Heat treatment |
STC370 | Hot-finished seamless process | S-H | As manufactured |
STC440 | Cold-finished electric resistance welding | E-C | As cold drawn or stress relief annealing |
STC510A | Cold-finished seamless process | S-C | As cold drawn or stress relief annealing |
Cold-finished electric resistance welding | E-C | As cold drawn or stress relief annealing | |
STC510B | Cold-finished seamless process | S-C | Stress relief annealing |
Cold-finished electric resistance welding | E-C | Stress relief annealing | |
STC540 | Hot-finished seamless process | S-H | As manufactured |
STC590A | Cold-finished seamless process | S-C | As cold drawn or stress relief annealing |
STC590B | Cold-finished seamless process | S-C | Stress relief annealing |
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 G3473 Carbon Steel Tubes for Cylinder Barrels
Symbol of grade | C | Si | Mn | P | S | Nb or V |
STC370 | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.040 max. | 0.040 max. | — |
STC440 | ||||||
STC510A | ||||||
STC510B | 0.18 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. | — |
STC540 | 0.25 max. | 0.55 max. | 1.60 max. | 0.040 max. | 0.040 max. | 0.15 max. |
STC590A | 0.25 max. | 0.35 max. | 0.30 to 0.90 | 0.040 max. | 0.040 max. | — |
STC590B | 0.25 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. | — |
Symbol of grade | Tensile strength N/mm2 | Yield point or proof stress N/mm2 | Elongation % |
Test piece No. 11 or test piece No. 12 | |||
Direction parallel to tube axis | |||
STC370 | 370 min. | 215 min. | 30 min. |
STC440 | 440 min. | 305 min. | 10 min. |
STC510A | 510 min. | 380 min. | 10 min. |
STC510B | 510 min. | 380 min. | 15 min. |
STC540 | 540 min. | 390 min. | 20 min. |
STC590A | 590 min. | 490 min. | 10 min. |
STC590B | 590 min. | 490 min. | 15 min. |
NOTE : 1 N/mm2 = 1 MPa |
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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