শিল্প অ্যাপ্লিকেশনের জন্য ইস্পাত পাইপ এবং ইস্পাত আবরণ ব্যবহারের সুবিধাগুলি
টেনসিল এবং হার্ডনেস রিকোয়ারমেন্টস
| গ্রেড | |||||||||
| ইল্ড স্ট্রেন্থ এমপিএ | টেনসিল | শক্তি কঠোরতা | a,c নির্দিষ্ট দেয়ালের বেধ | অনুমোদিত কঠোরতা | প্রকরণ b | ||||
| প্রকার | লোডের অধীনে মোট প্রসারণ | মিন এমপিএ | সর্বোচ্চ | ||||||
| মিন | সর্বোচ্চ | HRC | HBW | mm | HRC | H40 | |||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 0.5 | 276 | 552 | 414 | J55 | |||||
| 0.5 | 379 | 552 | 517 | K55 | |||||
| 0.5 | 379 | 552 | 655 | N80 | |||||
| 1 | 0.5 | 552 | 758 | 689 | N80 | ||||
| প্রশ্ন | 0.5 | 552 | 758 | 689 | R95 | ||||
| 0.5 | 655 | 758 | 724 | l80 L80 | |||||
| 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | L80 | ||
| 9Cr 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | |||
| 0.5 | 552 | 655 | 655 | 23 | 241 | C90 | |||
| 12.70 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | 3 | |
| 12.71 থেকে 19.04 | 4 | ||||||||
| 19.05 থেকে 25.39 | 5 | ||||||||
| 25.40 | T95 | 6 | |||||||
| 12.70 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | 3 | |
| 12.71 থেকে 19.04 | 4 | ||||||||
| 19.05 থেকে 25.39 | 5 | ||||||||
| 25.40 | C110 | 6 | |||||||
| 12.70 | 0.7 | 758 | 828 | 793 | 30 | 286 | 3 | ||
| 12.71 থেকে 19.04 | 4 | ||||||||
| 19.05 থেকে 25.39 | 5 | ||||||||
| 25.40 | P110 | 6 | |||||||
| 0.6 | 758 | 965 | 862 | প্রশ্ন125 | |||||
| b | 1 | 0.65 | 862 | 1034 | 931 | 12.70 | 3 | ||
| 12.71 থেকে 19.04 19.05 | 4 | ||||||||
| a বিরোধের ক্ষেত্রে, পরীক্ষাগার রকওয়েল সি কঠোরতা পরীক্ষা রেফারি পদ্ধতি হিসাবে ব্যবহার করা হবে। | 5 | ||||||||
| b কোন কঠোরতার সীমা নির্দিষ্ট করা নেই, তবে সর্বাধিক বৈচিত্রটি 7.8 এবং 7.9 অনুসারে একটি উত্পাদন নিয়ন্ত্রণ হিসাবে সীমাবদ্ধ। | |||||||||
| c গ্রেড L80 (সকল প্রকার), C90, T95 এবং C110-এর মাধ্যমে দেয়ালের কঠোরতা পরীক্ষার জন্য, HRC স্কেলে বর্ণিত প্রয়োজনীয়তাগুলি সর্বাধিক গড় কঠোরতা নম্বরের জন্য। | |||||||||
| c For through-wall hardness tests of grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number. | |||||||||
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