This article describes a test procedure for evaluating the sulfide corrosion cracking resistance of high strength, low alloy steels. The proposed test specimen is a double cantilever beam, fracture mechanics specimen. Sulfide cracking resistance is described in terms of the critical stress intensity for environmentally induced slow crack growth (Klt). Data presented show that the proposed test is highly sensitive to a steel's sulfide cracking resistance. Large differences in cracking resistance are found between nominally identical steels supplied by different producers.