ASME/ASTM A387

ASTM Standard Logo .

Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum to ASTM A 387 Standard

Use:

ASTM A387 grade steel plates are intended for welded boilers and pressure vessels designed for elevated temperature environments.

ASTM A387 Chemical Properties (Cast Analysis)

 

C

Mn

P

S

SI

Cr

Mo

Grade 5

0.15 max

0.3 - 0.6

0.035

0.03

0.5 max

4.00 - 6.00

0.45 - 0.65

Grade 9

0.15 max

0.30 - 0.6

0.03

0.03

1.0 max

8.0 - 10.0

0.9 - 1.1

Grade 11

0.05 - 0.17

0.4 - 0.65

0.035

0.035

0.5 - 0.80

1.0 - 1.5

0.45 - 0.65

Grade 12

0.05 - 0.17

0.4 - 0.65

0.035

0.035

0.15 - 0.4

0.8 - 1.15

0.45 - 0.6

Grade 22

0.05 - 0.15

0.3 - 0.6

0.035

0.035

0.5 max

2.0 - 2.5

0.9 - 1.1

ASTM A387 Mechanical Properties

 

Tensile Strength

(ksi)

Tensile Strength

(MPa)

Yield Strength

(ksi)

Yield Strength (MPa)

Elongation

in 2 inches (%)

A 387 Grade 5

Class 1

60-85

415-585

30

205

18

Class 2

75-100

515-690

45

310

18

A 387 Grade 9

Class 1

60-85

415-585

30

205

18

Class 2

75-100

515-690

45

310

18

A 387 Grade 11

Class 1

60-85

415-585

35

240

22

Class 2

70-90

485-620

45

310

22

A 387 Grade 12

Class 1

50-80

380-550

33

230

22

Class 2

65-85

450-585

40

275

22

A 387 Grade 22

Class 1

60-85

415-585

30

205

18

Class 2

75-100

515-690

45

310

18

We can supply:

Thickness from 6mm to 150mm (although thicker plates might be manufactured under special order)
Width: from 1,500mm to 4,100mm
Length: from 6,000mm to 20,000mm

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