Low Carbon Plates

Low Carbon Plates

Carbon Steel Low Intermediate Tensile Steel Plates

ASTM A 285 Grade A/B/C, A 283 Grade A/B/C

This specification covers carbon steel plates of low- and intermediate-tensile strengths which may be made by killed, semi-killed, capped, or rimmed steel. These plates are intended for fusion-welded pressure vessels. Plates are normally supplied in the as-rolled condition. The steel shall conform to the required chemical compositions. The plates, as represented by the tension test specimens, shall conform to the mechanical property requirements.

Plates under this specification are available in three grades having different strength levels as follows:

Grade	Tensile Strength, ksi (MPa)
A	45-65 (310-450)
B	50-70 (345-485)
C	55-75 (380-515)

The maximum thickness of plates under this specification, for reasons of internal soundness, is limited to a maximum thickness of 2 in. [50 mm] for all grades.

ASTM A 537 Class 1 & 2

This specification covers the standard for heat-treated carbon manganese-silicon steel plates intended for fusion welded pressure vessels and structures. The steel shall be killed and undergo normalization, quenching and tempering. Heat and product analyses shall be performed on the materials and results shall conform to the required values in chemical composition in carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium and molybdenum. Mechanical testing like tension test shall be done on the plates and shall conform to the required tensile strength, yield strength, and elongation.

The maximum thickness of plates furnished under this specification is 4 in. [100 mm] for Class 1 and 6 in. (150 mm) for Class 2 and Class 3.

Carbon Steel Low & Intermediate Tensile Steel Plates

ASTM A 285 Grade A/B/C, A 283 Grade A/B/C, ASTM A 537 Class 1 & 2