A204 Grade A molybdenum-alloy steel plate equivalent

 ASTM A204 Grade A (A204Gr.A) steel is a molybdenum-alloy steel plate, intended particularly for welded boilers and other pressure vessels. The minimum yield strength of A204Gr.A steel is 255 MPa,tensile strength within 450-585 MPa.

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ASTM A204 Grade A steel chemical composition (%)

Material	C	Si	Mn	P	S	Mo
A204 Grade A	0.18-0.25	0.15-0.40	0.90 max.	0.025	0.025	0.45–0.60

ASTM A204 Grade A boiler steel plate mechanical properties

Item	A204 Grade A
Tensile strength, kis [MPa]	65-85 [450-585]
Yield strength, min, kis [MPa]	37 [255]
Elongation in 8 in. [200 mm], min, %	19
Elongation in 2 in. [50 mm], min, %	23

A204 Grade A equivalent grades

ASTM	DIN17155	EN 10028-2
A204 Grade A	15Mo3	16Mo3

ASTM A204 boiler steel plate size
Thickness: 3-250mm
Width: 1220-4200mm
Length: 3000-18000mm
Notes: coil thickness ≤ 25mm