Aslida, material uchun maxsus tartibga solish yo'q8,8 darajali murvatlar, faqat kimyoviy tarkibning ruxsat etilgan diapazoni ko'rsatilgan. Materiallar ushbu belgilangan diapazondagi talablarga javob bersa, u 8,8-sinfdagi yuqori quvvatli murvatlar uchun material sifatida ishlatilishi mumkin. Biroq, ko'plab mutaxassislar hali ham 8,8-sinf murvatlari uchun standartni material tanlash uchun muhim ma'lumotnoma sifatida ko'rib chiqadilar.
Turli xil talablarga ega 8,8 gradusli murvatlarning ishlash talablariga javob berish uchun material quyidagi xususiyatlarga erishish uchun maxsus issiqlik bilan ishlov berishdan o'tishi kerak:
1. Bolt materialining nominal kuchlanish kuchi 640MPa darajasiga etadi;
2. Bolt materialining oquvchanlik nisbati 0,8;
3. Bolt materialining nominal oquvchanligi 640 × 0.8=800MPa darajasiga etadi;
4. Materiallarni tanlashda,8,8-darajali olti burchakli murvatlar1035ACR (M10 va undan past uchun) va 1040ACR (M12 va undan yuqori uchun), CH38F, 1045ACR, 1039, 10B21, 10B33, 10B38 va boshqalar kabi materiallardan foydalanishi mumkin;
5. 8,8 toifali olti burchakli murvatlar CH38F, 1039, 10B21 (M10-M12 uchun), 10B33 (M14 uchun), 10B38 (M12-M24 uchun), 1035ACR (quyida M10 uchun) kabi materiallardan foydalanishi mumkin. ), va 1040ACR (yuqoridagi M12 uchun);
6. Karbonli po'latdan yasalgan mahsulotlarda ishlatiladigan disk elementlari har xil turdagi materiallarga ko'ra tanlanishi mumkin. Masalan, 4,8 toifali olti burchakli murvatlar 1008K, 1010 va 1015K kabi materiallardan tayyorlanishi mumkin, 6,8 gradusli olti burchakli murvatlar 1032, 1035, 1040, CH38F va 1039, 8,8 kabi materiallardan tayyorlanishi mumkin.olti burchakli murvatlar1035ACR (M10 va undan past uchun) va 1040ACR (M12 va undan yuqori), CH38F, 1045ACR, 1039, 10B21, 10B33 va 10B38 kabi materiallardan va 8,8 toifali ichki olti burchakli murvatlar, masalan, CH38F kabi materiallardan tayyorlanishi mumkin. , 1039, 10B21 (M10-M12 va undan yuqori uchun) va 10B38. B33 (M14 uchun), 10B38 (M{27}}M24 uchun), 1035ACR (quyida M10 uchun) va 1040ACR (yuqoridagi M12 uchun) kabi materiallar 10,9-darajali olti burchakli murvat uchun ishlatilishi mumkin. 1045ACR va 10B38 kabi materiallar 8-sinf va undan yuqori yong'oqlar uchun ishlatilishi mumkin. 1015 (M<16) and CH38F (M ≥ 16) can be used for grade 10 nuts. Materials such as CH38F, 1039, 10B21, and 10B33 can be used for grade 12 nuts. Materials such as 1039, 10B21, 10B33, and 10B38 can be used for carriage screws. 1015 and other materials can be used for hexagonal protruding bolts, CH38F, 1039, 10B21, 10B33, 10B38 and other materials can be used. Hexagonal wood screws can be made of 1008K, 1010 and other materials, including self tapping nails, wall panel nails, drill tail nails, etc Plywood nails can be made of materials such as 1018, 1022, CH22A, etc.
8.8-sinfning materiali va ishlash talablarini to'liq tushunishmurvatlarmuhandislik ehtiyojlarini qondirish uchun mos materiallarni yaxshiroq tanlashga yordam berishi mumkin.
