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ASTM A542 Grade E alloy steel plates for pressure vessels

A542 Grade E

A542 Grade E in the standard A-542/A-542M is a kind of Mo-V alloy steel plates material used to fabric high temperature pressure vessels. A542 have Five grades or levels. They are : grade A, grade B, grade C, grade D, grade E . A542 Grade E need to be done the (Quenching + Tempering ) heat-treatment to meet the property requirement in the standard ASTM A-542/A-542M.

ASTM A542 Grade E steel chemical composition :

Composition

Grade B

C

Heat analyse

0.10~0.15

Product analyse

0.06~0.18

Mn

Heat analyse

0.30~0.60

Product analyse

0.25~0.66

P ≤

Heat analyse

0.010

Product analyse

0.010

S ≤

Heat analyse

0.010

Product analyse

0.010

Si ≤

Heat analyse

0.15

Product analyse

0.15

Ni ≤

Heat analyse

0.25

Product analyse

0.28

Cr

Heat analyse

2.85-3.25

Product analyse

2.63-3.37

Mo

Heat analyse

0.90~1.10

Product analyse

0.85~1.15

B

Heat analyse

-

Product analyse

-

V

Heat analyse

0.20-0.30

Product analyse

0.18-0.33

Ti

Heat analyse

-

Product analyse

-

Ca②

 

0.005-0.0015

 

-

Cu≤

Heat analyse

0.25

Product analyse

0.28

Nb

Heat analyse

0.015-0.070

Product analyse

0.010-0.075

Note : ① In A 542/A 542M-82 standard and the earlier standard, the steel plates whose thickness ≤ 125mm, C must be ≤ 0.15%
② Ca can be replace by REM as the agreement with manufacturer and buyer, if like this, then the total amount of REM should be stated.

ASTM A542 Grade E steel mechanical properties :

ASTM A542 Grade E

Class 4

Class 4a

Tensile strength ksi(Mpa)

85-110(585-760)

85-110(585-760)

Yield strength , Min , ksi(Mpa)

55(380)

60(415)

Elongation 2in(50mm),%,A

20

18

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