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F1554 Grade 36/55 Substitution Clause

Grade Tensile Strength, ksi (MPa) Description Yield Strength, min, ksi (MPa) Size Range, in. (mm)
36A 58 – 80 (400 – 558) 36 (248) 14 – 4 (6.4 – 102)
55 75 – 95 (517 – 655) 55 (380) 14 – 4 (6.4 – 102)
105 125 – 150 (862 – 1034) 105 (724) 14 – 3 (6.4 – 76.2)
Class
1A anchor bolts with Class 1A threads
2A anchor bolts with Class 2A threads
A When Grade 36 is specified, a weldable Grade 55 may be furnished at the supplier’s option.

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