ASME SA572 steel standard covers five grades of high-strength low-alloy structural steel shapes, plates, sheet piling, and bars. SA572 Grades 42 [290], 50 [345], and 55 [380] are intended for riveted, bolted, or welded structures. SA572 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.
ASME SA572 equivalent: EN S355JR (1.0045), DIN St52-3, GB Q345B.
ASME SA572 low alloy steel plates and sheets size
Shapes: steel plate, steel sheet, steel bar, angle steel, steel section
Thickness: 1.2-380mm
Width: 1220-4200mm
Length: 5000-18000mm
Notes: coil thickness ≤ 25mm
Chemical composition (%) for ASME SA572 low alloy steel
| Grades | Max. inches | Carbon, max | Manganese, max | Phosphorus, max | Sulfur, max | Silicon, max |
| SA572 Grade 42 | 6 | 0.21 | 1.35 | 0.030 | 0.030 | 0.40 |
| SA572 Grade 50 | 4 | 0.23 | 1.35 | 0.030 | 0.030 | 0.40 |
| SA572 Grade 55 | 2 | 0.25 | 1.35 | 0.030 | 0.030 | 0.40 |
| SA572 Grade 60 | 1-1/4 | 0.26 | 1.35 | 0.030 | 0.030 | 0.40 |
| SA572 Grade 65 | ½ to 1-1/4 | 0.23 | 1.65 | 0.030 | 0.030 | 0.40 |
| Grade 65 | Below ½ | 0.26 | 1.35 | 0.030 | 0.030 | 0.40 |
Tensile requirement of ASME SA572 low alloy steel
| Grade | Yield strength Re | Tensile strength Rm | Minimum elongation % | |
| MPa [ksi] min. | MPa min. | min. 200 mm[8 in.] | min. 50 mm[2 in.] | |
| Grade 42 | 290 [42] | 415 | 20 | 24 |
| Grade 50 | 345 [50] | 450 | 18 | 21 |
| Grade 55 | 380 [55] | 485 | 17 | 20 |
| Grade 60 | 415 [60] | 520 | 16 | 18 |
| Grade 65 | 450 [65] | 550 | 15 | 17 |
As a professional low alloy steel plate and sheet supplier in China, we can supply hot rolled ASME SA572 Grade 50 [345] plates, SA572 Grade 55 [380] low alloy steel sheets and SA572 Grade 65 plate price. For ASME SA572 low alloy steel applications, such as welded bridge construction, where notch toughness is important, notch toughness requirements are to be negotiated between the purchaser and the producer.
Leave a Comment