... . 30 3-1/2 E, X, G, S IU or EU 3-1/2 15. 50 3-1/2 ... 4-1/2 E, X, G, S EU or IU 4-1/2 20. 00 4-1/2 E, X ... 5 25. 60 5 X, G, S EU or IU 5-1/2 21. 90 5-1/2 E, X ... , G, S IU and EU 5-1/2 24. 70 5-1/2 ... E, X, G, S IU and EU 6-5/8 25. 20 6-5/8 ... E, X, G, S IU and EU 6-5/8 27. 70 6-5/8 ... E, X, G, S IU and EU Tensile Performance Requirement GRADE YIELD STRENGTH (psi) TENSILE ...