ASTM A592 / A592M

This specification2 covers high-strength quenched and tempered low-alloy steel forged parts for pressure vessels. The maximum thickness of forgings under this specification shall be 11⁄2 in. [38 mm] for Grade A, and 4 in. [100 mm] for Grades E and F.Although no provision is made for supplementary requirements in this standard, the supplementary requirements in Specification A788/A788M may be considered by the purchaser. Welding technique is of fundamental importance and it is presupposed that welding procedures will be in accordance with approved methods for the class of material used.

Chemical Properties

Grade	Carbon	Manganese	Phosphorus	Sulphur	Silicon	Nickel	Chromium	Molybdenum	Vanadium	Titanium	Zirconium	Copper	Boron
Grade AA	0.15–0.21	0.80–1.10	0.025	0.025	0.40–0.80	...	0.50–0.80	0.18–0.28	...	...	0.05–0.15	...	0.0025 max
Grade EA	0.12–0.20	0.40–0.70	0.025	0.025	0.20–0.35	...	1.40–2.00	0.40–0.60	B	0.04–0.10	...	0.20–0.40	0.0015–0.005
Grade FA	0.10–0.20	0.60–1.00	0.025	0.025	0.15–0.35	0.70–1.00	0.40–0.65	0.40–0.60	0.03–0.08	...	...	0.15–0.50	0.002–0.006

Note:
A Similar to Specification A517/A517M Grades A, E, and F, respectively.
B May be substituted for part or all of titanium content on a one for one basis.

Mechanical Properties

Size	Tensile strength, psi (MPa)	Yield strength (0.2 % offset), min,psi [MPa]	Elongation in 2 in. [50 mm],min, %	Reduction of area, min, %
Up to 2 1⁄2 in. [65 mm], incl	115 000 to 135 000 [795 to 930]	100 000 [690]	18	45
Over 2 1⁄2 in. to 4 in. [65 to 100 mm], incl	105 000 to 135 000 [725 to 930]	90 000 [620]	17	40