JIS G3444 STK490 carbon steel pipe adopts seamless manufacturing process, has good mechanical properties and processing performance, and is widely used in various occasions requiring high strength and good weldability. It is suitable for various structural parts such as civil engineering, construction, iron towers, scaffolding, pillars, anti-slide steel piles, etc.
Products Data
JIS G3444 STK490 steel pipes/tubes Chemical Composition
| Symbol of class | C | Si | Mn | P | S |
| STK490 | 0.18 max | 0.55 max | 1.50 max | 0.040 max | 0.040 max |
JIS G3444 STK490 steel pipes/tubes Mechanical Properties
| Mechanical properties | Tensile strength N/mm2 | Yield point or proof stress N/mm2 | Elongation % | Bendability | Flattening | Tensile strength in welded zone N/mm2 | ||
| No.11 and No.12 test pieces | No.5 test piece | Bend angle | Inside radius (D: outside diameter of tube) | Distance between flattening plates (H) (D: outside diameter of tube) | ||||
| Longitudinal direction | Transverse direction | |||||||
| Method of manufacture | Seamless, butt-welding, electric resistance welding and arc welding process | Seamless, butt-welding, electric resistance welding process | Seamless, butt-welding, electric resistance welding process | Arc welding process | ||||
| Outside diameter | Full range | Full range | Over 40 mm | 50 mm or under | Full range | Over 350 mm | ||
| STK490 | 490 min | 315 min | 23 min | 18 min | 90° 6D | 7/8D | 490 min | |
Products display
JIS G3444 STK490 Carbon Steel Tube

Why Choose GNEE
GNEE has been engaged in the steel industry for more than 16 years. It has two steel pipe and plate series production and processing factories and three storage warehouses. Our annual production scale can reach 500,000 tons, and the warehouse inventory exceeds 20,000 tons per year.
In addition, we can also provide processing procedures for steel products, such as rust prevention, cutting and chamfering, connection, heat treatment, bending, galvanizing, polishing, beveling, pickling, spraying, CNC machining, etc.
If you would like to know more about our company or our products, please feel free to contact us. sales@gneetube.com
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FAQ
Q: Do you have quality control?
A: Yes, we have gained BV, SGS authentication.
Q: Can you arrange the shipment?
A: Sure, we have permanent freight forwarder who can gain the best price from most ship company and offer professional service.
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 25-45 days if the goods are not in stock, it is according to quantity.
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