ASTM A572 A high-strength low-alloy steel plate that is utilized in a variety of structural applications. This specification is produced in Grades 42, 50, 55, 60 & 65, the grades representing the yield strength. Plates that are 4 and thicker are made to a 42 KSI yield, although material can be modified to reach the 50 KSI min yield. ASTM A572 / A572M - 15 Standard Specification for High 1.1 This specification covers five grades of high-strength low-alloy structural steel shapes, plates, sheet piling, and bars. Grades 42 , 50 , and 55  are intended for riveted, bolted, or welded structures. Grades 60  and 65  are intended for riveted or bolted construction of bridges, or for riveted, bolted, or welded construction in other applications.
Wide-flange shapes are available in grade ASTM A992, which has generally replaced the older ASTM grades A572 and A36. Ranges of yield strength:A36:36,000 psi (250 MPa) A572:42,00060,000 psi (290410 MPa), with 50,000 psi (340 MPa) the most common. A588:Similar to A572. ASTM A572 Grade 50 Steel Equivalent, Gr 65, 60 Properties ASTM A572 Grade 50 Steel ASTM A572 grade 50 steel is a low-alloy high-strength structural steel with a yield strength of 50 ksi (345 MPa) and a tensile strength of 65 ksi (450 MPa). It has better mechanical properties than ASTM A36 steel. ASTM A572 contains 5 yield point grades:Grade 42, Grade 50, Grade 55, Grade 60 and Grade 65. ASTM Structural Steel Standards Infra-Metals Co.This grade has an ultimate tensile strength of 65,300 psi and a high tensile yield strength of 50,000 psi. It is used in a broad array of structural applications, some of which include buildings, transmission towers, bridges, construction equipment, and truck frames.
This specifiation covers the standard requirements for Grades 42 , 50 , 55 , 60 , and 65  of high-strength low-alloy columbium-vanadium structural steel shapes, plates, sheet piling, and bars for applications in bolted, welded, and riveted structures in bridges and buildings. Steel DesignA572 high strength low-alloy use for some beams Fy = 60 ksi, F u = 75 ksi, E = 29,000 ksi A992 for building framing used for most beams Fy = 50 ksi, F u = 65 ksi, E = 29,000 ksi (A572 Grade 50 has the same properties as A992) ASD where Ra = required strength (dead or live; force, moment or stress) Rn = nominal strength specified for ASD Steel Reference GuideWIDE FLANGE BEAMS Designated as W shapes, wide flange shapes are generally used as beams or columns. They are doubly-symmetric with substantially parallel inside flange surfaces. Depth sizes range from 4 to 36, and lengths from 20 to 60. Available in A992/A572-50 (Grade
S75. Maximum Yield Point to Tensile Strength Ratio - Grade 50 . S75.1 The maximum yield point shall be 65 ksi [450 MPa]. S75.2 The maximum yield to tensile ratio shall be 0.85. S77. Reduced Sulphur Grade 65 * S77.1 The Grade 65  shall be furnished with a WIDE FLANGE SHAPESYield Strength (MPa) min/max Tensile Strength (MPa) min/max Yield to Tensile Ratio (%) max A36 A572 Gr.50 250/ 345/ 400/550 450/-* *:For wide flange shapes with flange thickness over 3 in. [75mm], the 80 ksi [550MPa] maximum tensile strength does not apply.ASTM A992 Steel Beam & Channel A572 Grade 50 Steel In most cases it can be dual certified to A572 grade 50, exhibiting the high strength and improved weight-to-strength found in A572 carbon steel. A992 welds easily. It is often used to fabricate structural steel components where high corrosion resistance is required. Properties. Tensile Strength - 65 ksi. Yield Point - 65 ksi.