ASTM A841 boiler steel plate pressure vessel steel sheet

ASTM A841 boiler steel plate pressure vessel steel sheet is produced by the thermo-mechanical control process (TMCP), and is intended primarily for use in welded pressure vessels. ASTM A841 steel covers gardes of A841 grade A, A841 grade B, A841 grade C, A841 grade D, A841 grade E, A841 grade F. The maximum permitted nominal thickness of ASTM A841 boiler steel plate pressure vessel steel is 4 in. [100 mm] for A841 grades A, B, and C; and 1.5 in. [40 mm] for A841 grades D, E, and F.

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Steel Properties

ASTM A841 boiler steel plate pressure vessel steel sheet chemical composition:

Element Composition %	Grade A	Grade B	Grade C	Grade D	Grade E	Grade F
Carbon, max	0.20	0.15	0.10	0.09	0.07	0.10A
Manganese t ≤1.5 in. [40 mm]	0.70–1.35B	0.70–1.35B	0.70–1.60	1.00–2.00	0.70–1.60	1.10–1.70A
t > 1.5 in. [40 mm]	1.00–1.60	1.00–1.60	1.00–1.60	C	C	C
Phosphorus, max	0.030	0.030	0.030	0.010	0.015	0.020
Sulfur, max	0.030	0.025	0.015	0.005	0.005	0.008
Silicon	0.15–0.50	0.15–0.50	0.15–0.50	0.05–0.25	0.05–0.30	0.10–0.45
Copper, max	0.35	0.35	0.35	0.5	0.35	0.4
Nickel	0.25 max	0.60 max	0.25 max	1.0–5.0	0.60 max	0.85 max
Chromium, max	0.25	0.25	0.25	0.3	0.3	0.3
Molybdenum, max	0.08	0.3	0.08	0.4	0.3	0.5
Columbium, max	0.03	0.03	0.06	0.05	0.08	0.1
Vanadium, max	0.06	0.06	0.06	0.02	0.06	0.09
Titanium	D	D	0.006–0.02	0.006–0.03	D	E
Boron	...	...	...	0.0005–0.002	0.0007 max	0.0007 max
Aluminum, min	0.020 total or 0.015 acid solubleD	0.020 total or 0.015 acid solubleD	...	...	0.020 total or 0.015 acid solubleD	0.020 total or 0.015 acid solubleD

ASTM A841 boiler steel plate pressure vessel steel sheet mechanical properties:

ASTM A841	Grade A, B and C		Grade D	Grade E		Grade F
ASTM A841	Class 1	Class 2	Class 3	Class 4	Class 5	Class 6	Class 7	Class 8
Yield strength, min. ksi [MPa]
to 1.5 in. [40 mm] incl	50 [345]	60 [415]	100 [690]	70 [485]	75 [515]	70 [485]	75 [515]	80 [550]
over 1.5 in. [40 mm] to 2.5 in. [to 65 mm]	50 [345]	60 [415]	A	A	A	A	A	A
over 2.5 in. [over 65 mm]	45 [310]	55 [380]	A	A	A	A	A	A
Tensile strength, ksi [MPa]
to 1.5 in. [40 mm] incl	70–90 [480–620]	80–100 [550–690]	145–170 [1000–1170]	84–104 [580–715]	88–108 [605–745]	82–102 [565–705]	86–106 [590–730]	90–110 [620–760]
over 1.5 in. [40 mm] to 2.5 in. [to 65 mm]	70–90 [480–620]	80–100 [550–690]	A	A	A	A	A	A
over 2.5 in. [over 65 mm]	65–85 [450–585]	75–95 [515–655]	A	A	A	A	A	A
Elongation in 2 in. [50 mm], min, %
to 1.5 in. [40 mm] incl	22	22	13	20	19	20	19	18
over 1.5 in. [40 mm] to 2.5 in. [to 65 mm]	22	22	A	A	A	A	A	A
over 2.5 in. [over 65 mm]	22	22	A	A	A	A	A	A
Elongation in 8 in. [200 mm], min, %
to 1.5 in. [40 mm] incl	18	...	...	16	15	16	15	14
over 1.5 in. [40 mm] to 2.5 in. [to 65 mm]	18	...	A	A	A	A	A	A
over 2.5 in. [over 65 mm]	18	...	A	A	A	A	A	A

Application

ASTM A841 boiler steel plate pressure vessel steel sheet application:
ASTM A841 boiler steel plate pressure vessel steel sheets are 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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