JIS G3473 Carbon Steel Tubes for Cylinder Barrels
- Model
- JIS G3473
Item specifics
- Delivery condition
- +A or +N
- Surface condition
- polished or honed
Review
Description
JIS G3473 Carbon Steel Tubes for Cylinder Barrels
Benefits Of G3473 Steel Tubes
Higher Strength & Hardness Properties
Size Accuracy
Enhanced Appearance
Uniform Micro-structure
Easier To Machine
Superior Finish In Subsequent Manipulations
G3473 Steel Tubes Applications
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.
G3473 Steel Tubes Manugacturing method and heat treatment
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 |
G3473 Steel Tubes Sizes and tolerances
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.
Standards
JIS G3473 Carbon Steel Tubes for Cylinder Barrels
G3473 Steel Tubes Chemical Component
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. | — |
G3473 Steel Tubes Mechanical Property
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 | |||
G3473 Steel Tubes Appearance
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.
Preparation of ends
The tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs.
G3473 Steel Tubes Inspection
Chemical analysis
Tensile test
Flattening test
Drift expanding test
Dimensional inspection
Visual examination
NDT for verification of leak tightness
G3473 Steel Tubes Protection
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.
G3473 Steel Tubes Option
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
Other Services
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)
