Warranty period 1 year.
Shelf life (service life) 4 years.
Reliability: the average MTBF for UBTS is 400 screwing - unscrewing.
Average service life before the first re-cutting of the UBTS is not less than 3000 hours, taking into account re-cutting not less than 18000 hours.
Mechanical properties:
UBTS with outer diameter up to 175 mm
Tensile strength not less than 965 MPa
Yield strength not less than 758 MPa;
Relative elongation not less than 13 %
Impact toughness KCU not less than 600 J/sq. m
Impact work KV value not less than 54 J
UBTS with outer diameter over 175 mm
Tensile strength not less than 931 MPa
Yield strength not less than 689 MPa;
Relative elongation not less than 13 %
Impact toughness KCU not less than 600 J/sq. m
Impact work KV value not less than 54 J
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