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Basic Information

JIS G3466 STKR490 TUBE (Carbon steel pipe for mechanical construction)
Standard: JIS G3466
Grade: STKR490 ("STK" means steel pipe for mechanical structures, "R" means cold working or hot working, "490" means minimum tensile strength of 490 MPa).
Outside Diameter: 20*20-1200-*200mm Wall Thickness:1.3-50mm
Outside Diameter: 20*30-1200*1500mm Wall Thickness:1.2-50mm
Length: 5.8,m, 6m, 12m or as your requirement
Surface Treatment: Painting, Oiling, Galvanized, 3lpe,3pe

Chemcial Composition
Grade Chemical Composition
C
max. Si
max. Mn
max. P
max. S
max.
STKR 400 0.25 - - 0.04 0.04
STKR 490 0.18 0.55 1.50 0.04 0.04
Physical Requirement

Grade Mechanical Properties
Tensile strength
Mpa Yield strength MPa Elongation
%
min
STKR 400 400 245 23
STKR 490 490 325 23

Application

JIS G3466 STKR490 steel pipe is a kind of high-strength carbon steel pipe, widely used in construction, machinery, automotive and other fields.

Main applications:

1. Building structure

- Use: Used in high-rise buildings, Bridges, towers, etc.

- Advantages: high strength, good weldability and workability.

2. Mechanical manufacturing

- Use: Manufacturing engineering machinery, agricultural machinery, mining equipment, etc.

- Advantages: wear resistance, impact resistance, suitable for heavy load environment.

3. The automobile industry

- Use: Used for frame, chassis, drive shaft, etc.

- Advantages: High strength and good fatigue performance, improve safety and durability.

4. The energy sector

- Application: Used for oil and natural gas pipeline and support.

- Advantages: high pressure resistance, corrosion resistance, suitable for harsh environment.

5. Other areas

- Use: Used in the manufacture of cranes, ships, railway vehicles, etc.

- Advantages: high strength and good processability, suitable for a variety of needs.

Core advantages

High strength:
Tensile strength ≥490 MPa, suitable for load-bearing and impact resistance scenarios.

Good machinability:
It is easy to weld, bend, cut, to meet the needs of complex structures.

Economy:
Compared with alloy steel, carbon steel has lower cost and high cost performance.

Standardization
It is in line with JIS standards, stable quality, easy to global procurement.

Correlation standard comparison:

JIS G3445: Alloy steel tubes for mechanical structures (such as STKM series, higher strength but higher cost);
ASTM A500: Carbon steel tube for American standard construction (similar in performance to JIS G3466, but different in standard system).

Matters needing attention

Welding requirements:
The welding process should be controlled to avoid a decrease in the strength of the heat affected zone.

Anti-corrosion treatment:
exposure to damp or corrosive environment needs to be galvanized, coating and other treatment.

Quality certification:
The material complies with JIS G3466 standard and is tested (e.g. tensile test, impact test).