Use plasma cutters for thick sections (≥20mm) or abrasive saws for cleaner edges. Mark cuts with chalk and guide rails to prevent deviations. Cool the beam with air/water to minimize heat distortion. For mass production, CNC cutting ensures precision. Always wear PPE against sparks and metal fumes.
What are the tolerances for HEA 280 beams per EN 10034?
Flange width tolerance: ±3mm; Web height: ±2mm; Straightness: ≤1mm per meter. Weight tolerance is ±5% per batch. These ensure compatibility with bolt holes and other components. Manufacturers use laser scanning for QA. Non-compliant beams are rejected or reprocessed.
How do you prevent corrosion on stainless steel H beams?
Type 316 stainless steel resists saltwater corrosion with 2–3% molybdenum content. Passivation with nitric acid removes surface iron particles. Regular cleaning prevents chloride buildup. Avoid carbon steel contact to prevent galvanic corrosion. Inspect welds for carbide precipitation.
What are the cost factors for custom H beams?
Material grade (A36 vs. A992), quantity (economies of scale), and processing (cutting/drilling) affect pricing. Shipping heavy beams incurs freight surcharges. Lead times stretch for alloys like A572 Grade 50. Compare quotes from mills versus fabricators.
How are H beams recycled at end-of-life?
Scrap H beams are melted in electric arc furnaces, reducing CO2 emissions by 60% vs. virgin steel. Magnetic sorting ensures purity. Recycled steel meets same ASTM/EN standards. Many mills offer buy-back programs. Recycling 1 ton saves 1.5 tons of iron ore.