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ASTM A588 / A588M - 15
ASTM A588 / A588M - 15
ASTM A588 / A588M - 15
ASTM A588 / A588M - 15

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.
Product introduction
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.
Technical Data
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%

Plate Properties
 
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.
 
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