Heat-Treated, Carbon-Manganese-Silicon Pressure Vessel Plates
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This specification covers heat-treated carbon-manganese-silicon steel plates intended for fusion welded pressure vessels and structures. Plates furnished under this specification are available in three classes, where ASTM A537 Class 3 shall be quenched and tempered. The tempering temperature for Class 3 plates shall not be less than 1150°F [620°C].

Range

Plates (thickness)

min

1/2" [6.35mm]

max

6" [152mm]

Range

C

Mn < 1 1⁄2 in. [40 mm]

Mn > 1 1⁄2 in. [40 mm]

P

S

Si

Cu

Ni

Cr

Mo

min

-

0.70

1.00

-

-

0.15

-

-

-

-

max

0.24

1.35

1.60

0.025

0.025

0.50

0.35

0.25

0.25

0.08

Yield Strength < 2 1⁄2"

Yield Strength 2 1⁄2" to 4"

Yield Strength 4" to 6"

Tensile Strength < 2 1⁄2"

Tensile Strength 2 1⁄2" to 4"

Tensile Strength 4" to 6"

min

55 Ksi [380 MPa]

50 Ksi [345 MPa]

40 Ksi [275 MPa]

80 Ksi [550 MPa]

75 Ksi [515 MPa]

70 Ksi [485 MPa]

max

-

-

-

-

-

-

Simone Woods

Simone Woods