ASTM A572 steel properties - ASTM A572 chemical composition and mechanical property

ASTM A572 steel is high strength structural steel with industry leading tolerance, concentricity, and straightness due to the addition of strong carbide and nitride formers that produce a small and fine grain, giving the best notch toughness.

Under ASTM A572 standard, there are 5 steel grades totally: A572 Gr 42, A572 Gr 50, A572 Gr 55, A572 Gr 60, A572 Gr 65. Below is ASTM A572 steel properties - ASTM A572 chemical composition and mechanical property.

ASTM A572 steel properties - ASTM A572 chemical composition:

Standard	Grs	Chemical Element
		C max. %	Mn %	S%	P max%	Si
ASTM A572	Gr 42	0.21	≤1.35	0.05	0.04	≤0.04
	Gr 50	0.23	≤1.35	0.05	0.04	≤0.04
	Gr 55	0.25	≤1.35	0.05	0.04	≤0.04
	Gr 60	0.26	≤1.35	0.05	0.04	≤0.04
	Gr 65	0.23	≤1.65	0.05	0.04	≤0.04

ASTM A572 steel properties - ASTM A572 mechanical property:

Standard	Gr	Yield strength	Tensile strength	Minimum elongation %
		MPa [ksi]	MPa [ksi]	min. 200 mm[8 in.]	min. 50 mm[2 in.]
ASTM A572	Gr 42	≥290 [42]	≥415 [60]	20	24
	Gr 50	≥345 [50]	≥450 [65]	18	21
	Gr 55	≥380 [55]	≥485 [70]	17	20
	Gr 60	≥415 [60]	≥520 [75]	16	18
	Gr 65	≥450 [65]	≥550 [80]	15	17

ASTM A572 chemical composition and mechanical property are distinct among different steel grades. Among the five ASTM A572 steel grades, A572 Gr 50 is the most popular one and widely used in bridges, buildings, construction equipment, freight cars, machinery, truck parts and transmission towers, etc.