ASTM A622 Boiler Vessel Plate

ASTM A662 specification covers three grades, Grades A, B, and C, it is a kind of carbon-manganese-silicon steel plates intended primarily for service in welded pressure vessels where improved low temperature notch toughness is important. It is mostly used to manufacture middle or low temperature pressure vessels.

ASTM A622 boiler vessel plates are divided into 3 levels: Level A, Level B, and Level C. The main difference in chemical composition among the 3 levels is the manganese content. Increased manganese content can improve the yield and tensile strength of steel plates.

The upper thickness limit for ASTM A622 boiler vessel plates is limited only by the ability of the chemical composition to meet the specified mechanical property requirements. ASTM A622 Boiler Vessel Plate shall be normalized when thickness exceeds 40mm. When the thickness does not exceed 40 mm, Class B and Class C ASTM A622 boiler vessel plates are usually supplied in the rolled state, and can also be ordered as normalized or stress-relieved, or normalized and stress-relieved.

About ASTM A662 Steel Plate

Thickness: 5mm-100mm

Length: 4000mm- 12000mm

Width: 1000mm- 4000mm

Application: Low temperature pressure vessel plate, boiler steel plate

Supplementary Technology: Heat Treatment: Normalized, Quenched, Tempered, HIC, Impact Test, NDT, PWHT, NACE0175, Third Party Test.

Surface: Coated or Shot Blasting and Painting.

Delivery state: Hot Rolled, Cold Rolled

Steel Grade: Grade A, Grade B, Grade C

ASTM A662 Chemical Composition:

Steel Grade	ASTM A662 Chemical Composition Max (%)
Steel Grade	C	Si	Mn	P	S	Al	N
Grade A	0,17	0.13-0.45	0.84-1.46	0.035	0.035	-	-
Grade B	0,22	0.13-0.45	0.79-1.62	0.035	0.035	-	-
Grade C	0,24	0.13-0.55	0.92-1.72	0.035	0.035	-	-

ASTM A662 Mechanical Property:

Steel Grade		ASTM A662 Mechanical Property
Steel Grade	Thickness	Yield	Tensile	Elongation
Grade A	mm	Min Mpa	Mpa	Min %
	6-50	275	400-540	23%
	50-200	275	400-540	20%
Grade B	6-50	275	450-585	23%
Grade B	50-200	275	450-585	20%
Grade C	6-50	295	480-620	22%
Grade C	50-200	295	480-620	18%