ASTM A204/ ASME SA-204 Pressure Vessel Plate

August 16, 2020

Standard, Grades & Thicknesses

Pressure vessel plates made of ASTM A204 (identical with ASME SA-204) steels are typical molybdenum-alloy steel plates intended particularly for welded boilers and other pressure vessels. The steel grades covered by ASTM A204/ ASME SA-204 are all carbon-molybdenum alloy steels with nominal composition of C-0.5Mo. Plates under this standard specification are available in three grades having different strength levels as follows:

Grade	Tensile Strength ksi [MPa]
A	65-85 [450-585]
B	70-90 [485-620]
C	75-95 [515-655]

The maximum thickness of ASTM A204 plates is limited only by the capacity of the composition to meet the specified mechanical property requirements; however, current practice normally limits the maximum thicknesses of plates made of Grade A, Grade B and Grade C steel to 6″ [150 mm], 6″ [150 mm], 4″ [100 mm], respectively.

Manufacture & Heat Treatment

ASTM A204 Grade B C-0.5Mo alloy steel pressure vessel plates in stock, normalized.

The ASTM A204 plates shall be made from killed steels. Plates 1-1/2″ [40 mm] and under in thickness are normally supplied in the as-rolled condition. The plates may be ordered normalized or stress relieved or both. Plates over 1-1/2″ [40 mm] in thickness shall be normalized.

Chemical Composition Requirements

Element	t	Composition, %
Element	t	Gr. A	Gr. B	Gr. C
C	t≤1"	≤0.18	≤0.20	≤0.23
	1"	≤0.21	≤0.23	≤0.26
	2"	≤0.23	≤0.25	≤0.28
	t>4"	≤0.25	≤0.27	≤0.28
Mn	All	≤0.90	≤0.90	≤0.90
P	All	≤0.025	≤0.025	≤0.025
S	All	≤0.025	≤0.025	≤0.025
Si	All	0.15-0.40	0.15-0.40	0.15-0.40
Mo	All	0.45-0.60	0.45-0.60	0.45-0.60

*All values shall be applied to heat analysis.

Mechanical Properties

ASTM A204	Gr. A	Gr. B	Gr. C
T.S. MPa [ksi]	450-585 [65-85]	485-620 [70-90]	515-655 [75-95]
Y.S. min. MPa [ksi]	255 [37]	275 [40]	295 [43]
El. in 8" min. %	19	17	16
El. in 2" min. %	23	21	20

*T.S.: tensile strength; *Y.S.: yield strength; El.: elongation.

Optional Testing

Additional tension test, Charpy V-Notch test, drop weight test, high-temperature tension test, ultrasonic examination, magnetic particle examination.

Maybe you like also

» ASTM B265 Grade 2 Titanium Strips & Coils

» ASTM B348 Titanium Bars and Billets

» ASTM A240 Type 316Ti Plates

» ASTM A240 304/304L, 316/316L | Plate, Sheet, Strip

» ASTM A204/ ASME SA-204 Pressure Vessel Plate

» ASTM A203 Nickel-Alloy Steel Plates

Knife Gate Valves for Ash Handling Systems in Power Plants

Pneumatic Actuated Knife Gate Valves

Twin Sphere Rubber Expansion Joints

Knife Gate Valves for Antamina Copper Mine Slurry Transport

Knife Gate Valves for Copper Slurry Pipeline Systems

We have been dedicating ourselves to piping and pipeline engineering since the inception. The company provides integrated solution to package supply of various piping & pipeline materials, components, and equipment.

Products
About Us
Contact Us
Sitemap
Application
Technical

Room 502, No.448 Heping West Road, Shijiazhuang, Hebei Province, China
Tel: +86-311-67906676
Fax: +86-311-67906676
Email: sales@pipingpipeline.com
Whatsapp: 0086-15076331069