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A738 Grade A

ASTM A738 Grade A steel plate/sheet

ASTM A738 Grade A is a kind of low Carbon, age-hardening, Ni-Cu-Cr-Mo alloy steel plates material used to fabric pressure vessels. A738 is divided into two grades or levels:A738 Grade A,A738 Grade B and A738 Grade C.

This specification ASTM A738 covers two grades of low-carbon age-hardening alloy steel plates for welded pressure vessels and piping components.

Standard: ASTM A738/A738M

Dimension range : 3mm -500mm * 1000mm-4000mm * 1000mm-18000mm

ASTM A738 Grade A steel plate/sheet Mechanical Properties :


Mechanical Properties

Grade

Thickness

Yield
Strength

Tensile Strength

Elongation

Charpy V Notch Impact Test

Degree

Min Value

A738 Grade A

mm

Min Mpa

Mpa

Min %

-

J

5≤t≤50

275

450-585

23%

-

50≤t≤150

275

450-585

20%

 

-

Note: Impact energy for impact test is on longitudinal

A738 Grade A Boiler steel plate Chemical Composition :


Chemical Composition

A738 Grade A

The Element Max (%)

C

Si

Mn

P

S

Ni

Mo

Heat analyse

0.07

0.40

0.40~0.70

0.025

0.025

0.70~1.00

0.15~0.25

Product analyse

0.09

0.45

0.35~0.78

-

-

0.67~1.03

0.12~0.28

Delivery Status : Normalizing + tempering

ASTM A738 Grade A pressure vessel steel application :
A738 Grade A steel plate is mainly used in petroleum, chemical industry, power station, boiler and other industries, for the production reactor, heat exchanger, separator, spherical tank, oil tank, liquefied gas tank, nuclear reactor pressure shell, boiler drum, liquefaction Oil cylinders, high-pressure water pipe hydropower station, turbine volute and other equipment and components.

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