Salzgitter AG has secured extended material approvals for its SECURE 500® security-grade steel and obtained new approval for SECURE 450. Both products are designed for security-critical applications where enhanced resistance to forced entry, ballistic impact, or explosive loading is required. The approvals expand the group's technical documentation for structural steels in applications including perimeter protection, safes, and critical infrastructure. Security-grade steels typically feature modified microstructures and alloy compositions that deliver higher energy absorption while maintaining weldability and formability according to EN 1090 requirements.