Buying S690QL or S890QL? Start with the certificate, not the number in the grade name.
Published
EN 10025-6 requirements change with plate thickness, and the right choice also depends on welding, cutting, impact performance and the fabrication procedure. These structural grades are not interchangeable with SA387 pressure-vessel plate.
Read the article for a practical guide to checking certificates and choosing between S690QL and S890QL for cranes, bridges and heavy fabrications.
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