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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.
Product Description
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).
Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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