The parent pipe had a yield strength of 568MPa and UTS of 615MPa. (W 7) (1)

Yield strength = Limite de elasticidade

The ultimate tensile strength (UTS) of the parent metal was between 584 and 586MPa, exceeding the specified minimum tensile strength value from API 5L X70 of 570MPa. (W 34) (2)

Tensile strength = Resistência à tração

The fatigue strength and fatigue limit of the plain material increase with increase in tensile strength whereas those for welded joints are independent of tensile strength. W (16) (3)

Fatigue strength = Teste de fadiga

(1) Optimisation of SENT test specimen design

Phillipa Moore 

TWI Ltd, Granta Park Great Abington, Cambridge, CB21 6AL, UK

Paper presented at Eurojoin 9. 20-22 May 2015. Bergen, Norway.

(2) The effect of inclusions on the fracture toughness of local brittle zones in the HAZ of girth welded line pipe

Philippa Moore and Joanna Nicholas 

TWI Ltd, 

Cambridge, UK.

Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering 

June 9-14, 2013, Nantes, France

(3) Estimating long-endurance fatigue strength of girth-welded pipes using local stress approach

Yanhui Zhang and Steve J Maddox 

TWI Ltd, Granta Park, Great Abington, Cambridge CB21 6AL, UK

Paper presented at Proceedings 33rd International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2014) June 8-13, 2014, San Francisco, USA