Q: What does "CE marking" require for S235JR angles?
A: Compliance with CPR 305/2011: Factory Production Control (FPC) per EN 1090-1, testing per EN 10025-2, and Notified Body oversight for EXC2+. CE label includes: manufacturer ID, EXC class, harmonized standard (e.g., EN 1090), and declared performance. Documentation must be retained for 10 years.
Q: How does EN 1993-1-1 govern structural design?
A: It defines partial safety factors (γ_M0=1.0, γ_M1=1.0, γ_M2=1.25), buckling curves, and load combinations. Ultimate Limit State (ULS) checks prevent collapse; Serviceability Limit State (SLS) ensures deflection limits. National Annexes (e.g., UK NA) adapt rules regionally.
Q: What is EN 1090 Execution Class EXC2?
A: EXC2 covers structures with moderate consequences of failure (e.g., residential buildings). Requires: Welder certification (EN ISO 9606), WPS qualification (EN ISO 15614), and traceability. Mandatory for CE-marked structural steelwork in the EU.
Q: How do ISO 9001 and ISO 3834 interact?
A: ISO 9001 certifies quality management systems; ISO 3834 specifies welding quality requirements. Combined certification ensures consistent fabrication. Audits verify: procedure qualifications, personnel competence, and inspection records. Non-compliances trigger corrective actions.
Q: What testing validates S235JR properties?
A: Tensile tests per EN ISO 6892-1: Yield (ReH), tensile (Rm), elongation (A). Charpy impact at +20°C per EN ISO 148-1. Bend tests per EN ISO 7438 validate ductility. Chemical analysis via optical emission spectrometry. Reports must align with EN 10204 requirements.
