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ASTM A572 Specification refers to High-Strength Low-Alloy Steel Plate for structural building, among the 5 steel grades of 42, 50, 55, 60 and 65, Grade 50 is one most common steel in applications where need more strength and less weight, use steel plate of this grade other than ordinary carbon steel will make the steel structure with same steel strength but lighter weight.
ASTM A572 steel plate is a popular grade of high-strength low-alloy (HSLA) steel that is typically used in structural applications. A572 steel contains chemical alloys that enhance the material’s hardness and ability to bear weight, and this material is lightweight relative to steel grades with similar compositions.
There are five different grades of A572 steel plate: Grade 42, Grade 50, Grade 55, Grade 60 and Grade 65. Each of these grades have slight differences in their mechanical properties and chemical compositions, which may make them more fitting for certain applications. A572-50, however, is the most common A572 grade.?
ASTM A572 steel plate is a popular grade of high-strength low-alloy (HSLA) steel that is typically used in structural applications. A572 steel contains chemical alloys that enhance the material’s hardness and ability to bear weight, and this material is lightweight relative to steel grades with similar compositions.
There are five different grades of A572 steel plate: Grade 42, Grade 50, Grade 55, Grade 60 and Grade 65. Each of these grades have slight differences in their mechanical properties and chemical compositions, which may make them more fitting for certain applications. A572-50, however, is the most common A572 grade.
A572 steel plate is lightweight, yet offers great strength, ductility and machinability, making it ideal for use in structural applications. These properties make A572 relatively simple to shape into different structures while also maintaining the ability to bear great stresses and loads. A572 is also one of the most economically priced grades of steel plate.
The chemical composition and mechanical properties of A572 steel plate are governed by ASTM code. While ASTM regulations are widely accepted around the world, some countries or projects may require steel plate materials that meet other standards. For projects requiring EN standard steel plate, S355 may be able to be used in place of A572-50, as these grades are generally considered equivalent and have various applications, including use in wind energy projects.
While not exact equivalents, other mild carbon or HSLA plate grades – such as ASTM A36 – may also be suitable for similar applications, as these grades often have similar chemical and mechanical properties.
A572 steel plate is typically used in various structural applications due to its ability to bear heavy weight while still being relatively light and machinable. Some of the most common infrastructure applications for A572 plate include bridge construction and building construction.
While most commonly used in the infrastructure sector, A572 plate is also widely used in other industries, including:
Energy, for use in constructing transmission towers and wind turbine structures and componentsConstruction, for use in producing construction equipmentIndustrial manufacturing, for use in producing machinery and truck partsRoad plate applications
| Thru 47" | 48 to 59" | 60 to 71" | 72 to 83" | 84 to 95" | 96 to 107" | 108 to 119" | 120 to 131" | 132 to 143" | 144 to 167" | |
|---|---|---|---|---|---|---|---|---|---|---|
| To under 1/4 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 | - |
| 1/4 to under 5/16 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 | 0.04 | - |
| 5/16 to under 3/8 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 | 0.04 | 0.05 |
| 3/8 to under 5/8 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 | 0.04 | 0.05 | 0.06 |
| 3/4 to under 1 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 | 0.04 | 0.05 | 0.05 | 0.06 | 0.07 |
| 1 to under 2 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.07 | 0.08 | 0.10 | 0.10 | 0.11 |
| 2 to under 3 | 0.09 | 0.09 | 0.09 | 0.10 | 0.10 | 0.11 | 0.12 | 0.13 | 0.14 | 0.15 |
| 3 to under 4 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.13 | 0.14 | 0.14 | 0.14 | 0.15 |
| 4 to under 6 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.20 |
| Standards | Grades | Chemical Element | ||||
|---|---|---|---|---|---|---|
| C max. % | Mn % | S% | P max% | Si | ||
| ASTM A572 | Grade 42 | 0.21 | ≤1.35 | 0.05 | 0.04 | ≤0.04 |
| Grade 50 | 0.23 | ≤1.35 | 0.05 | 0.04 | ≤0.04 | |
| Grade 55 | 0.25 | ≤1.35 | 0.05 | 0.04 | ≤0.04 | |
| Grade 60 | 0.26 | ≤1.35 | 0.05 | 0.04 | ≤0.04 | |
| Grade 65 | 0.23 | ≤1.65 | 0.05 | 0.04 | ≤0.04 | |
| Standard | Grade | Yield strength Re | Tensile strength Rm | Minimum elongation % | |
|---|---|---|---|---|---|
| MPa [ksi] | MPa [ksi] | min. 200 mm[8 in.] | min. 50 mm[2 in.] | ||
| ASTM A572 | Grade 42 | ≥290 [42] | ≥415 [60] | 20 | 24 |
| Grade 50 | ≥345 [50] | ≥450 [65] | 18 | 21 | |
| Grade 55 | ≥380 [55] | ≥485 [70] | 17 | 20 | |
| Grade 60 | ≥415 [60] | ≥520 [75] | 16 | 18 | |
| Grade 65 | ≥450 [65] | ≥550 [80] | 15 | 17 | |
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