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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.
cape verde ASTM A501 Grade B Tube
Category:
Product Description
Scope
ASTM A501 Grade B is a standard specification for hot-formed welded and seamless carbon steel structural tubing with a minimum yield strength of 40 ksi (280 MPa). It is commonly used in construction, bridges, and general structural applications where high strength and weldability are required.
ASTM A501 Grade B Tube
Grade: GR.B
Size:
SQUARE: 20MM * 20MM - 1200MM * 1200MM
RECTANGULAR: 20MM * 30MM - 1500MM * 1200MM
Wall thickness: 1.3MM - 50MM
Wall Thickness Tolerance: Control within the standard limits.
Length: 1 - 12M, normally 5.8M,6M, 12M, also depends on the requirements
Surface treatment: Galvanizing, Black vanish, Carving, Slightly oil painting, PVC clothes cover each bundle etc.
Production capacity: 300000 tons per year.
Production delivery time:15 -- 30 days acc to order quantity and sizes.
Shipping: Bulk vessel shipment & Container shipment.
Brand: LEFIN STEEL
Chemical Composition
The chemical composition (max % by weight) for A501 Grade B is as follows:
| Composition,% | ||
| Grade B | ||
| Element | Heat analysis | Product analysis |
| Carbon,max | 0.22 | 0.26 |
| Manganese,max | 1.4 | 1.45 |
| Phosphorus,max | 0.03 | 0.04 |
| Suffur,max | 0.02 | 0.03 |
| Copper,when copper steel is specified,min | 0.2 | 0.18 |
Note: Unlike ASTM A500 (cold-formed tubing), A501 allows for higher carbon and manganese content, improving weldability and strength.
Mechanical Properties
| Property | Requirement |
|---|---|
| Tensile Strength | 65 ksi min (450 MPa) |
| Yield Strength | 40 ksi min (280 MPa) |
| Elongation (in 2") | 24% min |
Impact Testing: Not typically required unless specified by the purchaser.
Manufacturing Process
Hot-formed (seamless or welded)
Can be produced via electric resistance welding (ERW), continuous welding, or seamless process.
Typically supplied in round, square, or rectangular shapes.
Applications And Advantages
Applications
Structural frameworks (buildings, bridges)
Construction machinery (cranes, scaffolding)
Transmission towers & poles
Heavy equipment & trailers
Advantages
Higher strength-to-weight ratio than A500
Better weldability due to controlled chemistry
Cost-effective for structural applications
Comparison With ASTM A500
| Feature | A501 Gr. B | A500 Gr. B |
|---|---|---|
| Forming Process | Hot-formed | Cold-formed |
| Carbon Content | Higher (0.26% max) | Lower (0.23% max) |
| Yield Strength | 50 ksi (345 MPa) | 46 ksi (317 MPa) |
| Weldability | Better due to higher Mn | Slightly less favorable |
| Common Shapes | Round, Square, Rectangular | Same |
Conclusion
ASTM A501 Grade B is a high-strength, hot-formed structural tubing ideal for welded construction projects requiring durability and ease of fabrication. It offers a balance of strength, weldability, and cost efficiency, making it a preferred choice over A500 in certain structural applications.
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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