ASTM A588 / A588M steel

Standard specification for high-strength low-alloy structural steel, up to 50 ksi [345 MPa] minimum yield point, with atmospheric corrosion resistance.
The required ASTM G101 Corrosion Resistance Index must be ≥ 6.0.    In addition to the typical application in welded bridges and buildings, the specification is also commonly used in passenger rail cars.

The specifications:
Thickness: 3mm--150mm
Width: 30mm--4000mm
Length: 1000mm--12000mm
Standard: ASTM EN10025 JIS GB

ASTM A588 Chemical Composition

A588 Steel Composition
	Grade A	Grade B	Grade K		Grade C
Carbon	0.19%	0.2%	0.17%		0.17%
Manganese	0.8-1.25%	0.75-1.35%	0.50-1.20%		0.50-1.20%
Phosphorus	0.03%	0.03%	0.03%		0.03%
Sulfur	0.03%	0.03%	0.03%		0.03%
Silicon	0.30-0.65%	0.15-0.50%	0.25-0.50%		0.25-0.50%
Nickel	0.4%	0.5%	0.4%		0.4%
Chromium	0.4-0.65%	0.4-0.7%	0.4-0.7%		0.4-0.7%
Molybdenum	...	...	0.1%		0.1%
Copper	0.25-0.4%	0.2-0.4%	0.3-0.5%		0.3-0.5%
Vanadium	0.02-0.10%	0.01-0.10%	...
Columbium	...	...	0.005-0.05%		0.005-0.05%

Grade A588 Properties

GRADE	THICKNESS	TENSILE KSI	YIELD KSI	% ELONG. MIN
				8"	2"
A588	.75"THRU 4"	70MIN	50 YP MIN	16	19
	>4"THRU 4"	67MIN	46 YP MIN	-
	>5"THRU 8"	63MIN	42 YP MIN

Properties
Tensile: 70 ksi min (4 inch and under), 67 ksi min (4-5) 63 ksi min (Over 5-8)
Yield: 50 ksi min (4 and under), 46 ksi min (4- 5) 42 ksi min (Over 5-8)
Elongation: 16 percent min in 8 inch 19 percent min in 2 inch (for plates wider than 24 inch)in sheet.
Typical Uses
This steel can be left unpainted making it ideal application including bridges, buildings, and other structures.