Chapel Steel stocks A709 Grade 36, A709 Grade 50 and A709 Grade 50W. These grades are often specified with Charpy tests referencing the specific zone or lowest anticipated service temperature. The Charpy tests are specified as non-fracture critical, which is a per-heat test (frequency "H"), or fracture critical, which is a per-plate test
ASME SA633 Gr. E/SA633 Grade E high strength low alloy ASME SA633 Gr. E/SA633 Grade E high strength low alloy HSLA steel plates provide a minimum yield point of 60 ksi [415 MPa] in thicknesses up to 4.0 in. [100 mm], inclusive and 55 ksi [380 MPa] in thicknesses over 4 in. to 6 in. [100 to 150 mm], inclusive. For the thickness above 75mm, SA633 Grade E steel plates need to be done double normalized.