Haiyan Hager Fastener Co., Ltd. |
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Stud Bolt DIN975 976 Metric Size L7 L7M L43 "Thread to Thread" M16-2.0~M100-6.0
High strength products processed by domestic materials 4140 alloy steel, net belt furnace or medium frequency furnace heat treatment, high temperature resistance, products are widely used in oil, power plants, offshore exploration, tower and various high temperature and low temperature resistance environment
The mechanical performance of the product shall meet the following standards, and the specification is less than or equal to 2-1 / 2 inches
TENSILE STRENGTH ≥690/mm2
YIELD STRENGTH ≥550/mm2
ELONGATION ≥18%
REDUCE ≥50%
TEMPERING ≥620℃
QUENCHING 850-950℃
HARDNESS HRB 93-99
CHARPY V NOTCH IMPACT VALUE (J) -73℃