What is A588 Corten Steel Angle?
A588 carbon steel angle is a weather-resistant structural steel profile that meets ASTM standards. A588 Angle Steel contains alloying elements such as 0.20–0.40% copper (Cu), 0.40–0.65% chromium (Cr), and up to 0.40% nickel (Ni), enabling it to develop a dense, stable protective patina that provides atmospheric corrosion resistance approximately 4–8 times greater than conventional carbon steel.
With a minimum yield strength of 345 MPa (50 ksi), A588 angle steel delivers excellent structural performance and load-bearing capacity. Its self-protecting surface can reduce maintenance and repainting costs by 30–50% over the structure's lifecycle, while extending service life to more than 50 years in suitable atmospheric environments.
Widely used in bridges, transmission towers, railway structures, and architectural projects, A588 angle steel is an ideal material for exposed applications requiring both high strength and exceptional weather resistance.
What is A588 Angle Steel material equivalent to?
A588 Angle Steel is an ASTM weathering structural steel grade in the United States, which is commonly equivalent to European standard EN 10025-5 S355J2W / S355J0W, and Japanese standard JIS SPA-H weathering steel.
It also has close correlation with ASTM A242 in the ASTM system. These equivalent grades all belong to weathering steels and develop a protective rust patina. In typical outdoor environments, they can reduce maintenance and repainting requirements by approximately 30% to 50% over their service life.
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A588 steel angle Specification
Steel grade: A588.
Specification: ASTM A588.
Technology: hot rolled.
Type: equal & unequal.
Length: 6 m, 9 m, 12 m or per your request.
Equal angle:
Size: 20 × 20 mm - 200 × 200 mm.
Thickness: 3 to 22 mm.
Length: 6 m, 9 m, 12 m or per your request.
Unequal angle:
Size: 20 × 30 to 90 mm × 250 mm.
Thickness: 3 to 15 mm.
Length: 6 m, 9 m, 12 m or per your request.
Note: Special angle steel sizes are available if your order quantity surpasses the minimum.
| Element | Grade A | Grade B | Grade C | Grade K |
|---|---|---|---|---|
| Carbon (C) | ≤0.19 | ≤0.20 | ≤0.15 | ≤0.17 |
| Silicon (Si) | 0.15–0.40 | 0.15–0.50 | 0.15–0.40 | 0.25–0.50 |
| Manganese (Mn) | 0.80–1.25 | 0.75–1.25 | 0.80–1.25 | 0.50–1.20 |
| Phosphorus (P) | ≤0.035 | ≤0.040 | ≤0.035 | ≤0.030 |
| Sulfur (S) | ≤0.040 | ≤0.050 | ≤0.040 | ≤0.030 |
| Chromium (Cr) | 0.40–0.65 | 0.40–0.65 | 0.30–0.50 | 0.50–1.00 |
| Copper (Cu) | 0.25–0.40 | 0.25–0.40 | 0.20–0.40 | 0.30–0.50 |
| Nickel (Ni) | ≤0.40 | ≤0.50 | ≤0.25 | 0.40–1.00 |
| Vanadium (V) | 0.02–0.10 | 0.02–0.10 | - | - |
| Niobium (Nb) | - | - | 0.01–0.05 | - |
| Titanium (Ti) | - | - | - | ≤0.02 |
| Weathering Index | ≥6.0 | ≥6.0 | ≥6.0 | ≥6.0 |
| Property | Thickness ≤ 100 mm | Thickness 100–150 mm | Test Standard |
|---|---|---|---|
| Minimum Yield Strength | 345 MPa (50 ksi) | 315 MPa (46 ksi) | ASTM A370 |
| Tensile Strength | 485–620 MPa (70–90 ksi) | 460–620 MPa (67–90 ksi) | ASTM A370 |
| Minimum Elongation (200 mm gauge) | 18% | 18% | ASTM A370 |
| Minimum Elongation (50 mm gauge) | 21% | 21% | ASTM A370 |
We can provide chemical composition analysis, mechanical property testing, dimensional inspection, weight verification, and surface quality examination for A588 Angle Steel before shipment.
Third-party inspections are available upon request. We guarantee genuine ASTM A588 material, strict quality control, competitive pricing, and reliable service.
ASTM A588 Equal Angle Steel Size:
| Item | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) | Item | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|---|---|---|
| EA588001 | 20 | 20 | 3 | 0.889 | EA588045 | 80 | 80 | 7 | 8.525 |
| EA588002 | 20 | 20 | 4 | 1.145 | EA588046 | 80 | 80 | 8 | 9.658 |
| EA588003 | 25 | 25 | 3 | 1.124 | EA588047 | 80 | 80 | 10 | 11.874 |
| EA588004 | 25 | 25 | 4 | 1.459 | EA588048 | 90 | 90 | 6 | 8.35 |
| EA588005 | 30 | 30 | 3 | 1.373 | EA588049 | 90 | 90 | 7 | 9.656 |
| EA588006 | 30 | 30 | 4 | 1.786 | EA588050 | 90 | 90 | 8 | 10.946 |
| EA588007 | 35 | 35 | 3 | 1.578 | EA588051 | 90 | 90 | 10 | 13.476 |
| EA588008 | 35 | 35 | 4 | 2.072 | EA588052 | 90 | 90 | 12 | 15.94 |
| EA588009 | 35 | 35 | 5 | 2.551 | EA588053 | 100 | 100 | 6 | 9.5296 |
| EA588010 | 40 | 40 | 3 | 1.852 | EA588054 | 100 | 100 | 7 | 10.83 |
| EA588011 | 40 | 40 | 4 | 2.422 | EA588055 | 100 | 100 | 8 | 10.276 |
| EA588012 | 40 | 40 | 5 | 1.976 | EA588056 | 100 | 100 | 10 | 15.12 |
| EA588013 | 44 | 44 | 3 | 2.002 | EA588057 | 100 | 100 | 12 | 17.898 |
| EA588014 | 44 | 44 | 4 | 2.638 | EA588058 | 100 | 100 | 14 | 20.611 |
| EA588015 | 38 | 38 | 3 | 1.719 | EA588059 | 100 | 100 | 16 | 23.257 |
| EA588016 | 38 | 38 | 4 | 2.261 | EA588060 | 110 | 110 | 7 | 11.928 |
| EA588017 | 48 | 48 | 3 | 2.19 | EA588061 | 110 | 110 | 8 | 13.532 |
| EA588018 | 48 | 48 | 4 | 2.889 | EA588062 | 110 | 110 | 10 | 16.69 |
| EA588019 | 48 | 48 | 5 | 3.572 | EA588063 | 110 | 110 | 12 | 19.782 |
| EA588020 | 50 | 50 | 3 | 2.332 | EA588064 | 110 | 110 | 14 | 22.809 |
| EA588021 | 50 | 50 | 4 | 3.059 | EA588065 | 125 | 125 | 8 | 15.504 |
| EA588022 | 50 | 50 | 5 | 3.77 | EA588066 | 125 | 125 | 10 | 19.133 |
| EA588023 | 50 | 50 | 6 | 4.465 | EA588067 | 125 | 125 | 12 | 22.692 |
| EA588024 | 56 | 56 | 3 | 2.624 | EA588068 | 125 | 125 | 14 | 26.193 |
| EA588025 | 56 | 56 | 4 | 3.446 | EA588069 | 140 | 140 | 10 | 21.488 |
| EA588026 | 56 | 56 | 5 | 4.251 | EA588070 | 140 | 140 | 12 | 25.522 |
| EA588027 | 56 | 56 | 6 | 6.568 | EA588071 | 140 | 140 | 14 | 29.49 |
| EA588028 | 63 | 63 | 4 | 3.907 | EA588072 | 140 | 140 | 16 | 33.393 |
| EA588029 | 63 | 63 | 5 | 4.822 | EA588073 | 160 | 160 | 10 | 24.724 |
| EA588030 | 63 | 63 | 6 | 5.721 | EA588074 | 160 | 160 | 12 | 29.391 |
| EA588031 | 63 | 63 | 8 | 7.469 | EA588075 | 160 | 160 | 14 | 33.987 |
| EA588032 | 63 | 63 | 10 | 9.151 | EA588076 | 160 | 160 | 16 | 38.518 |
| EA588033 | 70 | 70 | 4 | 4.372 | EA588077 | 180 | 180 | 12 | 33.159 |
| EA588034 | 70 | 70 | 5 | 5.397 | EA588078 | 180 | 180 | 14 | 35.383 |
| EA588035 | 70 | 70 | 6 | 6.406 | EA588079 | 180 | 180 | 16 | 43.452 |
| EA5880529 | 70 | 70 | 7 | 7.398 | EA588080 | 180 | 180 | 18 | 48.634 |
| EA588037 | 70 | 70 | 8 | 8.373 | EA588081 | 200 | 200 | 14 | 42.894 |
| EA588038 | 75 | 75 | 5 | 5.818 | EA588082 | 200 | 200 | 16 | 48.56 |
| EA588039 | 75 | 75 | 6 | 6.905 | EA588083 | 200 | 200 | 18 | 54.501 |
| EA588040 | 75 | 75 | 7 | 7.976 | EA588084 | 200 | 200 | 20 | 60.056 |
| EA588041 | 75 | 75 | 8 | 9.03 | EA588085 | 200 | 200 | 22 | 71.168 |
| EA588042 | 75 | 75 | 10 | 11.089 | Length = 6 - 12 meters | ||||
| EA588043 | 80 | 80 | 5 | 6.211 | |||||
| EA588044 | 80 | 80 | 6 | 7.376 | |||||
ASTM A588 Unequal Angle Steel Size
| Item no. | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) | Item no. | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|---|---|---|
| UEA588001 | 30 | 20 | 3 | 1.14 | UEA588045 | 100 | 50 | 6 | 6.98 |
| UEA588002 | 30 | 20 | 4 | 1.49 | UEA588046 | 100 | 50 | 8 | 9.16 |
| UEA588003 | 40 | 20 | 3 | 1.38 | UEA588047 | 100 | 50 | 10 | 11.3 |
| UEA588004 | 40 | 20 | 3 | 1.8 | UEA588048 | 100 | 65 | 7 | 8.96 |
| UEA588005 | 40 | 25 | 4 | 1.97 | UEA588049 | 100 | 65 | 8 | 10.2 |
| UEA588006 | 45 | 30 | 4 | 2.3 | UEA588050 | 100 | 65 | 9 | 11.3 |
| UEA588007 | 45 | 30 | 5 | 2.82 | UEA588051 | 100 | 65 | 10 | 12.5 |
| UEA588008 | 50 | 30 | 5 | 3.02 | UEA588052 | 100 | 75 | 7 | 9.52 |
| UEA588009 | 50 | 30 | 6 | 3.58 | UEA588053 | 100 | 75 | 8 | 10.8 |
| UEA588010 | 50 | 40 | 4 | 2.77 | UEA588054 | 100 | 75 | 9 | 12.1 |
| UEA588011 | 50 | 40 | 5 | 3.42 | UEA588055 | 100 | 75 | 10 | 13.3 |
| UEA588012 | 50 | 40 | 6 | 4.03 | UEA588056 | 100 | 75 | 11 | 14.6 |
| UEA588013 | 60 | 30 | 5 | 3.43 | UEA588057 | 100 | 75 | 12 | 15.8 |
| UEA588014 | 60 | 30 | 6 | 4.06 | UEA588058 | 120 | 80 | 8 | 12.4 |
| UEA588015 | 60 | 30 | 7 | 4.68 | UEA588059 | 120 | 80 | 10 | 15.3 |
| UEA588016 | 60 | 40 | 5 | 3.83 | UEA588060 | 120 | 80 | 12 | 18.2 |
| UEA588017 | 60 | 40 | 6 | 4.54 | UEA588061 | 130 | 65 | 8 | 12.1 |
| UEA588018 | 60 | 40 | 7 | 5.24 | UEA588062 | 130 | 65 | 10 | 14.9 |
| UEA588019 | 65 | 50 | 5 | 4.43 | UEA588063 | 130 | 65 | 12 | 17.7 |
| UEA588020 | 65 | 50 | 6 | 5.26 | UEA588064 | 130 | 75 | 8 | 12.7 |
| UEA588021 | 65 | 50 | 7 | 6.08 | UEA588065 | 130 | 75 | 10 | 15.7 |
| UEA588022 | 65 | 50 | 8 | 6.88 | UEA588066 | 130 | 75 | 12 | 18.6 |
| UEA588023 | 75 | 50 | 5 | 4.83 | UEA588067 | 130 | 90 | 10 | 17 |
| UEA588024 | 75 | 50 | 6 | 5.75 | UEA588068 | 130 | 90 | 12 | 20.1 |
| UEA588025 | 75 | 50 | 7 | 6.65 | UEA588069 | 150 | 75 | 9 | 15.7 |
| UEA588026 | 75 | 50 | 8 | 7.53 | UEA588070 | 150 | 75 | 10 | 17.4 |
| UEA588027 | 75 | 50 | 9 | 8.4 | UEA588071 | 150 | 75 | 11 | 18.9 |
| UEA588028 | 75 | 55 | 5 | 5.04 | UEA588072 | 150 | 75 | 12 | 20.6 |
| UEA588029 | 75 | 55 | 7 | 6.93 | UEA588073 | 150 | 90 | 10 | 18.6 |
| UEA588030 | 75 | 65 | 6 | 6.49 | UEA588074 | 150 | 90 | 12 | 22 |
| UEA588031 | 75 | 65 | 8 | 8.48 | UEA588075 | 150 | 90 | 15 | 27.1 |
| UEA588032 | 75 | 65 | 10 | 10.5 | UEA588076 | 150 | 100 | 10 | 19.3 |
| UEA588033 | 80 | 40 | 6 | 5.51 | UEA588077 | 150 | 100 | 12 | 23 |
| UEA588034 | 80 | 40 | 8 | 7.21 | UEA588078 | 150 | 100 | 14 | 26.6 |
| UEA588035 | 80 | 60 | 6 | 6.49 | UEA588079 | 160 | 80 | 10 | 18.5 |
| UEA5880529 | 80 | 60 | 7 | 7.5 | UEA588080 | 160 | 80 | 12 | 22 |
| UEA588037 | 80 | 60 | 8 | 8.48 | UEA588081 | 160 | 80 | 14 | 25.4 |
| UEA588038 | 80 | 65 | 6 | 6.73 | UEA588082 | 200 | 100 | 10 | 23.4 |
| UEA588039 | 80 | 65 | 8 | 8.82 | UEA588083 | 200 | 100 | 12 | 27.8 |
| UEA588040 | 80 | 65 | 10 | 10.9 | UEA588084 | 200 | 100 | 15 | 34.4 |
| UEA588041 | 90 | 65 | 6 | 7.22 | UEA588085 | 250 | 90 | 10 | 26.6 |
| UEA588042 | 90 | 65 | 7 | 8.32 | Material: ASTM A588 Length = 6 - 12 meters | ||||
| UEA588043 | 90 | 65 | 8 | 9.44 | |||||
| UEA588044 | 90 | 65 | 10 | 11.7 | |||||
What is the difference between A588 Angle Steel and A572 Grade 50 Angle Steel?
Both A588 Angle Steel and A572 Grade 50 Angle Steel have a minimum yield strength of 345 MPa (50 ksi). However, A588 contains additional weathering elements such as approximately 0.20%–0.40% copper (Cu) and 0.40%–0.65% chromium (Cr), allowing it to form a self-protective rust patina.
As a result, its atmospheric corrosion resistance is approximately 4–8 times higher than that of ordinary carbon steel, making it more suitable for outdoor and exposed environments.
What is the difference between A588 Angle Steel and A36 Angle Steel?
A588 Angle Steel offers a minimum yield strength of 345 MPa (50 ksi), compared to 250 MPa (36 ksi) for A36 steel. In addition, A588 provides approximately 4–8 times greater atmospheric corrosion resistance and can reduce maintenance and repainting costs by about 30%–50% over the service life of a structure, making it a preferred choice for long-term outdoor applications.
Supplier of A588 Angle Steel
Our A588 Angle Steel is manufactured in strict accordance with ASTM A588 and related international standards. We offer a wide range of sizes, including equal and unequal angle sections, with leg sizes typically ranging from 25 mm to 250 mm, thicknesses from 3 mm to 35 mm, and lengths from 6 m to 12 m.
We offer a variety of processing services for A588 Angle Steel, including cutting, drilling, punching, welding, beveling, bending, surface cleaning, rust acceleration treatment (pre-weathering), and custom fabrication according to drawings.
Contact now to get the A588 Corten Steel Angle Quote
All processing is carried out with strict dimensional control to meet the requirements of construction, bridge, transmission tower, and infrastructure projects.
