JIAXING HAINA FASTENER CO.,LIMITED
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Views: 46 Author: Site Editor Publish Time: 2017-04-24 Origin: Site
| Mechanical Requirements | ||||||||
| Class and Grade | Diameter,in | Heat Treatment | Minimum Tempering Temperature °F | Tensile Strength, min,ksi | Yield Strength,min,ksi (0.2% offset) | Elongation in 2 in. Min,% | Reduction of Area, min,% | Hardness max |
| Ferritic Steels | ||||||||
| L7,L7A,L7B L7C,L70, L71,L72,L73 | 2-1/2 and under | quenched and tempered | 1100 | 125 | 105 | 16 | 50 | 321 HBW or 35 HRC |
| L43 | 4 and under | quenched and tempered | 1100 | 125 | 105 | 16 | 50 | 321 HBW or 35 HRC |
| L7M | 2-1/2 and under | quenched and tempered | 1150 | 100 | 80 | 18 | 50 | 235 HBW or 99 HRB |
| L1 | 1 and under | quenched and tempered | 125 | 105 | 16 | 50 | … | |
| Austenitic Steels | ||||||||
| Class 1:B8, B8C,B8M, B8P,B8F, B8T,B8LN, B8MLN | all diameters | carbide solution treated | 75 | 30 | 30 | 50 | 223 HBW or 96 HRB | |
| Class 1A: B8A,B8CA, B8MA,B8PA, B8FA,B8TA, B8LNA, B8MLNA | all diameters | carbide solution treated in the finished condition | 75 | 30 | 30 | 50 | 192 HBW or 90 HRB | |
| Class 2:D8, B8C,B8P, B8F,B8T | 3/4 and under over 3/4 to 1,incl over 1 to 1-1/4,incl over 1-1/4 to 1-1/2,incl | carbide solution treated in strain hardened | 125 115 105 100 | 100 80 65 50 | 12 15 20 28 | 35 30 35 45 | 321 HBW or 35 HRC 321 HBW or 35 HRC 321 HBW or 35 HRC 321 HBW or 35 HRC | |
| Class 2:B8M | 3/4 and under over 3/4 to 1,incl over 1 to 1-1/4,incl over 1-1/4 to 1-1/2,incl | carbide solution treated in strain hardened | 110 100 95 90 | 95 80 65 50 | 15 20 25 30 | 45 45 45 45 | 321 HBW or 35 HRC 321 HBW or 35 HRC 321 HBW or 35 HRC 321 HBW or 35 HRC | |
