Aluminum Extrusion Profile Tolerances: GB/T 5237 vs ISO 6361 vs ASTM B221 Explained", category: "Technical Guide", date: "May 5, 2026", readTime: "9 min read", image: IMG.factory, excerpt: "Dimensional tolerances for aluminum extrusion profiles vary between Chinese, European, and American standards. Understanding these differences is critical for specifying profiles correctly and avoiding costly rework.", tags: ["tolerance", "GB/T 5237", "ISO 6361", "ASTM B221", "dimensional accuracy"], relatedSlugs: ["6063-vs-6061-alloy-selection

May 5, 2026", readTime: "9 min read", image: IMG.factory, excerpt: "Dimensional tolerances for aluminum extrusion profiles vary between Chinese, European, and American standards. Understanding these differences is critical for specifying profiles correctly and avoiding costly rework.", tags: ["tolerance", "GB/T 5237", "ISO 6361", "ASTM B221", "dimensional accuracy"], relatedSlugs: ["6063-vs-6061-alloy-selection", "how-to-select-t-slot-profile-size | Technical Guide", date: "May 5, 2026", readTime: "9 min read", image: IMG.factory, excerpt: "Dimensional tolerances for aluminum extrusion profiles vary between Chinese, European, and American standards. Understanding these differences is critical for specifying profiles correctly and avoiding costly rework.", tags: ["tolerance", "GB/T 5237", "ISO 6361", "ASTM B221", "dimensional accuracy"], relatedSlugs: ["6063-vs-6061-alloy-selection", "how-to-select-t-slot-profile-size

Dimensional tolerances for aluminum extrusion profiles vary between Chinese, European, and American standards. Understanding these differences is critical for specifying profiles correctly and avoiding costly rework.", tags: ["tolerance", "GB/T 5237", "ISO 6361", "ASTM B221", "dimensional accuracy"], relatedSlugs: ["6063-vs-6061-alloy-selection", "how-to-select-t-slot-profile-size