Q:What are the characteristics and applications of equilateral angle steel?
A:Small size (side length ≤ 50mm): commonly used for interior decoration, light shelves, furniture support, electrogalvanizing can meet the anti-corrosion requirements.
Medium size (side length 63-90mm): suitable for outdoor steel structures and building frames, hot-dip galvanizing is required to enhance corrosion resistance.
Large size (side length ≥ 100mm): used in heavy industrial scenes (such as bridges and tower cranes), the material is mostly Q355B or higher strength steel, and the thickness of the hot-dip galvanized layer is ≥ 85μm.
Q:What are the characteristics and applications of unequal angle steel (∠long side × short side × thickness)?
A:Small side thickness ratio (such as ∠45×28): suitable for scenarios with limited space and unilateral force (such as narrow channel brackets).
Large side thickness ratio (such as ∠125×80): The long side has strong bearing capacity and is used in scenarios that require unidirectional high-strength support (such as heavy machinery bases).
Q:How to choose angle steel with suitable galvanizing process and specifications?
A:1. Electrogalvanized Angle Steel
Specification range: usually ≤∠63×63×6 (equal angle steel) or ≤∠75×50×6 (unequal angle steel).
Reason: Small-sized angle steel has a small surface area, low electrogalvanizing cost and good uniformity; thick-walled angle steel may have insufficient zinc layer adhesion when electrogalvanized.
2. Hot-dip galvanized angle steel
Specification range: full range of specifications, especially suitable for medium and large sizes ≥∠50×50×5.
Reason: The hot-dip galvanized layer is thick and has strong bonding strength, which can cover the grooves and welds of the angle steel, and is suitable for outdoor and high-load scenarios.
Q:How to choose customized angle steel for non-standard specifications?
A:Side length range: Equal angle steel side length can reach 200mm×200mm, unequal angle steel long side length can reach 250mm.
Thickness range: Common 2-20mm, special needs can reach 25mm (hot rolling process required).
Note: Customized specifications need to confirm the steel plant's production capacity, the price may be 10%-30% higher than standard parts, and the delivery cycle will be extended by 1-2 weeks.
Q:What are the reference suggestions for selecting galvanized angle steel?
A:1. Select specifications according to load: Light load (≤1kN): ∠30×30×3~∠50×50×4.
Medium load (1-5kN): ∠63×63×5~∠90×90×8.
Heavy load (≥5kN): ∠100×100×8 and above.
2. Select process according to environment: Indoor dry: electrogalvanizing; Outdoor/humid: hot-dip galvanizing; High corrosion: stainless steel or zinc-aluminum alloy coating.
3. Check standards: Confirm the implementation standards before purchasing (such as GB/T 13912-2020 "Metal Covering Hot-Dip Galvanizing of Steel Parts") to avoid non-standard and inferior products.