The chemical composition of American Standard A588 Grades A, B, and C weathering steel is outlined in the ASTM A588 specification. The following are the general chemical composition requirements for these grades:
A588 Grade A:
Carbon: 0.19% max
Manganese: 0.80-1.25%
Phosphorus: 0.05% max
Sulfur: 0.05% max
Silicon: 0.30-0.65%
Chromium: 0.40-0.65%
Nickel: 0.25% max
Copper: 0.25% max
A588 Grade B:
Carbon: 0.20% max
Manganese: 0.75-1.35%
Phosphorus: 0.04% max
Sulfur: 0.05% max
Silicon: 0.15-0.50%
Chromium: 0.40-0.70%
Nickel: 0.40% max
Copper: 0.25% max
A588 Grade C:
Carbon: 0.15% max
Manganese: 0.80-1.35%
Phosphorus: 0.04% max
Sulfur: 0.05% max
Silicon: 0.15-0.50%
Chromium: 0.40-0.70%
Nickel: 0.40% max
Copper: 0.25% max
The application range of A588 Grades A, B, and C weathering steel is quite broad, as they are suitable for various types of outdoor structures, including bridges, buildings, and other infrastructure projects. The high-strength low-alloy structural steel is well-suited for environments with high levels of atmospheric corrosion, and it is also used in industries where a high level of resistance to atmospheric corrosion is required.
American Standard A588 Grades A, B, and C weathering steel have specific chemical composition requirements outlined in the ASTM A588 specification. These grades are suitable for a wide range of outdoor structures, and they provide excellent resistance to atmospheric corrosion.
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