Structural Steel Plate · structural plate for industrial and commercial building structures, crane booms, machine frames, and general welded fabrication
1.1 This specification covers five grades of high-strength low-alloy structural steel shapes, plates, sheet piling, and bars. Grades 42 [290], 50 [345], and 55 [380] are intended for riveted, bolted, or welded structures. Grades 60 [415] and 65 [450] are intended for riveted or bolted construction of bridges, or for riveted, bolted, or welded construction in other applications. 1.2 For applications, such as welded bridge construction, where notch toughness is important, notch toughness requirements are to be…
Specification text excerpt, reproduced for reference. Read the full ASTM A572/A572M text →
| Item | Diameter, Thickness, or Distance Between Parallel Faces, in. [mm] |
|---|---|
| Diameter, Thickness, or Distance Between Parallel Faces, in. [mm] | 4 [100]E |
| Structural Shape Flange or Leg Thickness, in. [mm] | all |
| Carbon, max, % | 0.23 |
| Manganese,B max, % | 1.35D |
| Phosphorus, max, % | 0.030 |
| Sulfur, max, % | 0.030 |
| Silicon | 0.40 |
Limits as specified in ASTM A572/A572M. Where the standard sets different values by thickness or product analysis, each band is shown separately.
| Grade | Yield Point, min ksi [MPa] | Tensile Strength, min ksi [MPa] | Minimum Elongation, % / in 8 in. [200 mm] | Minimum Elongation, % / in 2 in. [50 mm] |
|---|---|---|---|---|
| 50 [345] | 50 [345] | 65 [450] | 18 | 21 |
| A See specimen orientation under the Tensile Tests section of Specification A6/A6M. / B Elongation not required to be determined for floor plate. / C For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19% minimum applies. / D For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grades 42, 50, and 55 [290, 345, and 380], and three percentage points for Grades 60 and 65 [415 and 450]. See elongation requirements adjustments in the Tensile Tests section of Specification A6/A6M. | A See specimen orientation under the Tensile Tests section of Specification A6/A6M. / B Elongation not required to be determined for floor plate. / C For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19% minimum applies. / D For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grades 42, 50, and 55 [290, 345, and 380], and three percentage points for Grades 60 and 65 [415 and 450]. See elongation requirements adjustments in the Tensile Tests section of Specification A6/A6M. | A See specimen orientation under the Tensile Tests section of Specification A6/A6M. / B Elongation not required to be determined for floor plate. / C For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19% minimum applies. / D For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grades 42, 50, and 55 [290, 345, and 380], and three percentage points for Grades 60 and 65 [415 and 450]. See elongation requirements adjustments in the Tensile Tests section of Specification A6/A6M. | A See specimen orientation under the Tensile Tests section of Specification A6/A6M. / B Elongation not required to be determined for floor plate. / C For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19% minimum applies. / D For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grades 42, 50, and 55 [290, 345, and 380], and three percentage points for Grades 60 and 65 [415 and 450]. See elongation requirements adjustments in the Tensile Tests section of Specification A6/A6M. | A See specimen orientation under the Tensile Tests section of Specification A6/A6M. / B Elongation not required to be determined for floor plate. / C For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19% minimum applies. / D For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grades 42, 50, and 55 [290, 345, and 380], and three percentage points for Grades 60 and 65 [415 and 450]. See elongation requirements adjustments in the Tensile Tests section of Specification A6/A6M. |
Mechanical requirements for the thickness ranges shown. Impact testing is carried out at the temperature specified for the grade.
A572 Gr.50 is normally specified for industrial and commercial building structures, crane booms, machine frames, and general welded fabrication.
We supply it cut to size by plasma, laser or waterjet, with edges machined or flame-cut to your drawing, and can deliver in the heat-treatment condition your fabrication procedure requires.
As-rolled, normalized, normalized rolled or thermomechanically rolled (TMCP), following the delivery condition coded in the grade designation.
Z15 / Z25 / Z35 to EN 10164 on request; UT to EN 10160; EN 10204 3.1 / 3.2 mill test certificate; Third-party inspection by SGS / BV / TÜV
Seaworthy packing — bottom skids, steel strapping, VCI film and edge protection — is standard for sea freight. Container loading plans with piece weights are issued before shipment.
Send the grade or the standard you specify, the thickness range, quantity and destination port. We reply with price, lead time, delivery term and the applicable certificate within 12 hours (Mon–Sat, GMT+8).
