The high strength low alloy structural steel plates A572 grade 42, A572 grade 50, A572 grade 55 are intended for riveted, bolted, or welded structures. A572 grade 60 and A572 grade 65 steel plates are intended for riveted or bolted construction of bridges, or for riveted, bolted, or welded construction in other applications.
ASTM A572 Gr 50 steel equivalent grades: GB Q355B (Q345B), ASME SA572 grade 50, DIN ST52-3, JIS SM490A, EN S355JR, FE510B, E36-2, etc.
ASTM A572 | Thickness | C | Mn | P | S | Si |
A572 grade 42 [290] | ≤150mm | 0.21 | 1.35 | 0.030 | 0.030 | 0.40 |
A572 grade 50 [345] | ≤100mm | 0.23 | 1.35 | 0.030 | 0.030 | 0.40 |
A572 grade 55 [380] | ≤50mm | 0.25 | 1.35 | 0.030 | 0.030 | 0.40 |
A572 grade 60 [415] | ≤32mm | 0.26 | 1.35 | 0.030 | 0.030 | 0.40 |
A572 grade 65 [450] | 13-32mm | 0.23 | 1.65 | 0.030 | 0.030 | 0.40 |
A572 grade 65 [450] | ≤13mm | 0.26 | 1.35 | 0.030 | 0.030 | 0.40 |
ASTM A572 | Maximum | Yield Strength | Tensile Strength | Elongation in | Elongation in |
Steel Grade | Thickness | min. ksi [Mpa] | min. ksi [Mpa] | 8in. [200mm] | 2in. [50mm] |
A572 Gr 42 [290] | 6in. [150mm] | 42 [290] | 60 [415] | ≥20% | ≥24% |
A572 Gr 50 [345] | 4in. [100mm] | 50 [345] | 65 [450] | ≥18% | ≥21% |
A572 Gr 55 [380] | 2in. [50mm] | 55 [380] | 70 [485] | ≥17% | ≥20% |
A572 Gr 60 [415] | 1.25in. [32mm] | 60 [415] | 75 [520] | ≥16% | ≥18% |
A572 Gr 65 [450] | 1.25in. [32mm] | 65 [450] | 80 [550] | ≥15% | ≥17% |
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