Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel
Heat-treated carbon-manganese-silicon steel plates meant for fusion-welded pressure vessels and structures.
Plates furnished under this specification are available in the following three classes:
| Class | Heat Treatment | Thickness | Yield Strength, min, ksi [MPa] | Tensile Strength, min, ksi [MPa] |
| 1 | Normalized | 21/2 in. and under [65 mm and under] Over 21/2 to 4 in. [Over 65 to 100 mm] | 50 [345] 45 [310] | 70 [485] 65 [450] |
| 2 | Quenched and tempered | 21/2 in. and under [65 mm and under] Over 21/2 to 4 in. [Over 65 to 100 mm] Over 4 to 6 in. [Over 100 to 150 mm] | 60 [415] 55 [380] 46 [315] | 80 [550] 75 [515] 70 [485] |
| 3 | Quenched and tempered | 21/2 in. and under [65 mm and under] Over 21/2 to 4 in. [Over 65 to 100 mm] | 55 [380] 50 [345] | 80 [550] 75 [515] |
| 4 | Over 4 to 6 in. [Over 100 to 150 mm] | 40 [275] | 70 [485] | |
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