Subject: Details of proposed alternative material for [part / drawing revision]

Thank you for advising that a “304 equivalent” is available. Our requirement is [specified grade, product standard and revision] for [part / quantity]. Please identify the exact material offered, manufacturer, product form, dimensions, supplied condition and surface finish.

Please provide a comparison against the specified requirements, including applicable chemical and mechanical requirements, guaranteed values and supporting documents. Identify differences and items not yet confirmed. Our intended fabrication and service conditions are [forming / welding / final treatment / environment]. Please explain any implications for those conditions and any further evaluation you propose.

Please quote the original specification and the proposed alternative separately where possible, stating the price and lead-time basis and any exclusions. This inquiry requests information for review and does not authorize substitution or release of the affected work. Please identify the approval needed before proceeding.