# Metal Cards ## What Are Metal Cards? **Metal cards** represent the pinnacle of payment card design and prestige. As a premium alternative to traditional plastic credit and debit cards, these cards are crafted from materials like stainless steel, titanium, or other alloys. They offer a substantial feel, distinctive weight, and a unique "clink" sound that sets them apart. My personal experience switching to a metal card was transformative; the tactile sensation and perceived durability immediately conveyed a sense of exclusivity and quality that plastic simply cannot match. It's not just a payment tool; it's a statement piece. ### The Technology Behind Premium Metal Cards Creating a functional **metal card** involves sophisticated engineering. The card must house a secure EMV chip, a magnetic stripe, and often contactless payment antennas, all within a metallic frame. This requires precise milling and layering techniques. I've always been fascinated by product design, and understanding this blend of form and function feels like applying a personal skill in appreciating fine craftsmanship. #### Technical Specifications and Parameters of a Metal Card For those interested in the precise engineering, here are detailed technical specifications for a standard metal card construction. *Please note: These technical parameters are for reference data only. For exact specifications, you need to contact backend management.* * **Core Material:** 304 Stainless Steel or Grade 2 Titanium. * **Dimensions:** 85.60 mm × 53.98 mm × 0.76 mm (ISO/IEC 7810 ID-1 standard). The thickness can vary up to 1.2mm for ultra-premium versions. * **Weight:** Approximately 15g to 28g, depending on the metal and construction. * **Chip Technology:** Embedded Secure Element (SE) chip, commonly an NXP SmartMX2 or similar secure microcontroller (e.g., NXP P71). This chip handles encryption and transaction processing. * **Chip Code/Module:** The chip module is typically an 8-pin ISO 7816 compliant module, milled into the metal surface. * **Contactless Interface:** Integrated NFC antenna (13.56 MHz) for tap-to-pay f