Q235B S235JR SS400 L Beam Equal/Unequal Angle Steel
Types of Angle Steel
Equal Angle Steel: Both legs of the angle are of equal length.
Unequal Angle Steel: The legs of the angle are of different lengths.
| Angle Steel | |
| Material | Q235B, Q345B, SS400, SS540, S235JR, S235JO, S235J2, S275JR, S275JO, etc. |
| Packing | with bundle, as per standard seaworthy package or as customer's requirement |
| Technique | hot rolled/cold rolled/galvanized |
| Thickness | 3-24mm |
| Length: | 1-12 m, or as requirements |
| Application | widely used in various building structure and engineering structure, such as the beam, bridges, transmission tower, lifting transportation machinery, ship, industrial furnace, reaction tower and container frame etc. |
Standards and Grades
| Region | Standard | Grades | Yield Strength (MPa) | Application |
| USA | ASTM A36 | A36 | 250 | General-purpose structural steel |
| ASTM A572 | 42, 50, 60, 65 | 290–450 | High-strength structural steel | |
| ASTM A992 | A992 | 345 | Building frames | |
| Europe | EN 10025-2 | S235, S275, S355, S420, S460 | 235–460 | General structural use |
| EN 10210 | S235, S275, S355 | 235–355 | Structural hollow sections | |
| China | GB/T 11263 | Q235, Q345, Q390, Q420, Q460 | 235–460 | Structural use |
| GB/T 1591 | Q345, Q390, Q420, Q460 | 345–460 | High-strength structural steel | |
| Japan | JIS G3101 | SS330, SS400, SS490, SS540 | 215–355 | General structural use |
| JIS G3106 | SM400, SM490, SM520, SM570 | 245–355 | Welded structural steel |
Summary Table: Common Applications by Grade
| Q235 | Good weldability,moderate strength | Building frames,light structural supports, machinery frames. |
| Q345 | High strength,excellent toughness | Bridges,heavy machinery,vehicle chassis. |
| SS400 | Good strength,formability | Building frameworks,transmission towers, industrial equipment. |
| A36 | Excellent weldability,ductility | Building frames,bridges,machinery bases. |
| A572 | High strength,corrosion resistance | Heavy construction,truck trailers,heavy-duty equipment. |
| S235JR | Moderate strength,impact resistance | Building frameworks,guardrails,machinery components. |
| S355JR | High strength,excellent toughness | Bridges,heavymachinery,vehicle chassis. |
Choosing the Right Grade
When selecting a steel angle grade, consider the following factors:
Load requirements: Higher strength grades (e.g., Q345, A572) for heavy loads.
Environmental conditions: Stainless steel or galvanized for corrosive environments.
Budget: Carbon steel grades (e.g., Q235, A36) for cost-effective solutions.
Normal Size
| Equal Angle Bar---Specification (mm) | Unequa Angle Bar---Specification (mm) | ||||||
| 25*3 | 75*5 | 100*12 | 140*16 | 25*16*3 | 70*45*5 | 100*63*7 | 140*90*10 |
| 25*4 | 75*6 | 100*14 | 160*10 | 32*20*3 | 70*45*6 | 100*63*8 | 140*90*12 |
| 30*3 | 75*7 | 100*16 | 160*12 | 32*20*4 | 70*45*7 | 100*63*10 | 140*90*14 |
| 30*4 | 75*8 | 110*7 | 160*14 | 40*25*3 | 75*50*5 | 100*80*6 | 160*100*10 |
| 40*4 | 75*10 | 110*8 | 160*16 | 40*28*3 | 75*50*6 | 100*80*7 | 160*100*12 |
| 40*5 | 80*6 | 110*10 | 180*12 | 45*28*4 | 75*50*8 | 100*80*8 | 160*100*14 |
| 50*5 | 80*8 | 110*12 | 180*14 | 50*32*3 | 75*50*10 | 100*80*10 | 160*100*16 |
| 50*6 | 80*10 | 110*14 | 180*16 | 50*32*4 | 80*50*5 | 110*70*6 | 180*110*10 |
| 63*5 | 90*8 | 125*8 | 180*18 | 56*36*3 | 80*50*6 | 110*70*7 | 180*110*12 |
| 63*6 | 90*10 | 125*10 | 200*14 | 56*36*4 | 80*50*7 | 110*70*8 | 180*110*14 |
| 63*8 | 90*12 | 125*12 | 200*16 | 56*36*5 | 80*50*8 | 110*70*10 | 180*110*16 |
| 70*5 | 100*6 | 125*14 | 200*18 | 63*40*4 | 90*58*5 | 125*80*7 | 200*125*12 |
| 70*6 | 100*7 | 140*10 | 200*20 | 63*40*5 | 90*58*6 | 125*80*8 | 200*125*14 |
| 70*7 | 100*8 | 140*12 | 200*24 | 63*40*6 | 90*58*7 | 125*80*10 | 200*125*16 |
| 70*8 | 100*10 | 140*14 | 63*40*7 | 90*56*8 | 125*80*12 | 200*125*18 | |
| 70*45*4 | 100*63*6 | 140*90*8 | |||||
Applications of Steel L Beams
Construction: Building frames, roof trusses, bridges, towers, and other structural applications.
Manufacturing: Machinery frames, equipment supports, conveyor systems, and storage racks.
Infrastructure: Transmission towers, signboards, and highway guardrails.
Other Applications: Furniture, trailers, and decorative purposes.
Comparison with Other Structural Beams
| Feature | H Beam | I Beam | C Channel |
| Shape | H-shaped | I-shaped | C-shaped |
| Load Capacity | High | Moderate | Low |
| Weight | Lightweight | Heavier than H beams | Lightweight |
| Applications | Heavy structures | Medium structures | Light structures |
Packaging and Shipping
Standard export packing. The modes of transportation include containerized sea freight, bulk sea freight, air freight, land transportation, and multi-modal transportation.
fAQ
Q: What are the common specifications of angle steel?
A: The specifications of angle steel are usually expressed in terms of edge width and edge thickness, such as 25 × 25 × 3mm. Common specifications can range from 20 × 20mm to 200 × 200mm.
Q: What are the materials of angle steel?
A: Common materials for angle steel include carbon steel, stainless steel, galvanized steel, etc. The specific material selection should be based on the requirements of the application scenario, such as corrosion resistance, strength, and cost.
Q: Is angle steel suitable for high temperature environments?
A: Ordinary carbon steel angle steel will lose some strength in high temperature environments and is not suitable for environments exceeding 400 ℃. Stainless steel angle steel can maintain stability at higher temperatures.
Q: Does the production process of angle steel have an impact on the environment?
A: The production of angle steel consumes a large amount of energy and generates certain carbon dioxide emissions. To reduce environmental impact, many manufacturers are using more energy-efficient equipment and processes, and extending the service life of angle steel through galvanizing processes to reduce resource waste.
Q: How to determine the quality of angle steel?
A: The surface of high-quality angle steel should be smooth and free of cracks, with uniform dimensions and tolerances in accordance with standards. Quality inspection includes chemical composition analysis, mechanical performance testing (such as stretching and bending), and inspection of surface anti-corrosion treatment.
Q: How to choose the appropriate specifications and thickness for angle steel?
A: The selection of angle steel specifications is usually determined by the load-bearing requirements and installation environment. Engineers will choose angle steel of different sizes and materials based on the load requirements and environmental corrosiveness of the project.